Cracked BuckeyeCracked Buckeye

Mason

Warren County · 57,153 residents

Tap water here comes from Ohio River intake, treated at Richard Miller Treatment Plant. The water here

Open on the map Compare with another place
Warren County

45040 in 10 facts

The 10 things that stand out about this ZIP against the other 1,232 in Ohio, each with its source.

  1. Where the water comes from Where the water here comes from: Ohio River intake at the plant's riverfront on Kellogg Ave in the California neighborhood, east Cincinnati. Source: EPA SDWIS
  2. Local history 1803 The town here was settled around 1803, earlier than 66% of the Ohio ZIPs with a researched town. Source: Ohio History Connection
  3. Homes and income $440,000 Home values run high here: a median of $440,000, more than 97% of Ohio ZIPs. Source: Census ACS
  4. Health 12.6% Self-reported health runs better here: 12.6% of adults report fair or poor health, lower than 97% of Ohio ZIPs. Source: CDC PLACES
  5. People 63% Educational attainment runs high here: 63% of adults 25 and over hold a bachelor's degree or higher, more than 97% of Ohio ZIPs. Source: Census ACS
  6. Life expectancy 83.4 years Life expectancy runs high here: 83.4 years at birth, estimated from deaths in 2010 to 2015, more than 97% of Ohio ZIPs. Source: CDC USALEEP
  7. Soils Septic systems here face few limits: the dominant soil is Russell-Miamian-Urban land complex, 2 to 6 percent slopes, moderately eroded, rated less limited than 94% of Ohio ZIPs for a conventional leach field. Source: USDA Soil Data Access
  8. School ratings 5.0 stars The main school district here rates well: 5.0 stars on the Ohio Report Card, higher than 93% of Ohio ZIPs. Source: Ohio school report cards
  9. Dams 11 This ZIP has a lot of high-hazard dams nearby: 11 within 10 miles, more than 95% of Ohio ZIPs. Source: National Inventory of Dams
  10. Traffic 97,616 vehicles a day Traffic runs heavy here: the busiest counted road carries 97,616 vehicles a day, more than 90% of Ohio ZIPs. Source: ODOT TIMS traffic count segments

Local events in 45040

26 events in the next 90 days from 5 public calendars. All local events in 45040

  1. Spaghetti a Plenty

    10:30 a.m. to 10 p.m. · Mason LaRosa's, Drive Mason · From Mason Deerfield Chamber

  2. Seat at the Table

    7 to 8 p.m. · Mason Community Center · From City of Mason

  3. Rotary Club of Mason Deerfield - Weekly Meeting

    7:30 to 8:30 a.m. · Manor House, Mason · From Mason Deerfield Chamber

Checked October 20; the events page is refreshed daily.

Your ballot

Who represents 45040, and what is on its ballot for the November 3, 2026 general election.

Locator: Warren County and Warren's U.S. House, Ohio Senate and Ohio House districtsLocator: Warren County and Warren's U.S. House, Ohio Senate and Ohio House districts.Warren CountyU.S. House district 1: Greg Landsman (D)Ohio Senate district 7: Steve Wilson (R)Ohio House district 56: Adam Mathews (R)
Warren County and 45040's U.S. House, Ohio Senate and Ohio House districts.
ChamberDistrictMemberParty
U.S. HouseDistrict 1——
Ohio SenateDistrict 7Steve WilsonR
Ohio HouseDistrict 56Adam MathewsR

U.S. House districts were redrawn for 2026 (Ohio Redistricting Commission, October 31, 2025). The district shown is the one on the November 3, 2026 ballot, which may differ from the district of your current representative.

Statewide races:

45040's district races:

Local questions and issues on 45040's 2026 ballot
JurisdictionTypeQuestion
Warren CountyTax Levy (Renewal)Renews a 1.21-mill property tax levy for the provide & maintain senior citizens services or facilities of Warren County for 5 years, beginning in 2026.

Matched to this ZIP by jurisdiction name: Deerfield Township, Deerfield Township Township, Mason, Mason City, Turtle Creek Township, Turtle Creek Township Township.

Last day of early in-person voting — 2026-11-01. Early in-person voting at county boards of elections ends on Sunday, November 1; the hours that day are 1 p.m. to 5 p.m. in the table above. By October 29, nearly 1.3 million Ohioans had already voted early in person or returned absentee ballots (Journal-News; Signal Ohio's counts from the Secretary of State's daily absentee file add to 1,289,090). The 2022 midterm saw 1.47 million early votes, then a record.

What's on my ballot in 45040 · Election 2026

Where does the tap water come from?

Where the tap water comes from and what is in it: the lake, river, reservoir or aquifer behind every tap, the plant that treats it, and what the compliance record and the lab results say about it.

Where the water comes from

Ohio River

Ohio River intake at the plant's riverfront on Kellogg Ave in the California neighborhood, east CincinnatiRichard Miller Treatment Plant · Cincinnati Public Water System · +1 more

Source: U.S. EPA SDWIS and Community Water System Service Area Boundaries (v3, 2026), Ohio EPA primacy data, 2020 census blocks: the system serving most residents, traced through purchases to the treating utility; Ohio EPA 2023 Sewer and Water… · EPA SDWIS · EPA service area boundaries · Ohio EPA drinking water · Ohio EPA rate survey

Elevation 587–956 ft, averaging 819 ft · Mason 592–923 ft, averaging 796 · Warren County 564–1,078 ft (USGS 3DEP)

Ohio River
Ohio River · via Cincinnati Public Water System
Drawn from: Ohio River intake at the plant's riverfront on Kellogg Ave in the California neighborhood, east Cincinnati
Treated at Richard Miller Treatment Plant, 5651 Kellogg Ave, Cincinnati, OH 45230 · plant boundary estimated
  • primaryCalifornia (Kellogg Ave) Ohio River intake · Ohio River · ~88%
    Intake pier on the Kentucky side of the channel; a tunnel over 100 ft under the riverbed feeds the pump station
  • storageReservoir No. 1 · Ohio River (raw water settling basin)
    Raw-water reservoir at the California site where pumped river water sits 2-4 days so grit settles out
  • storageReservoir No. 2 · Ohio River (raw water settling basin)
    Second raw-water settling reservoir at the California site, working alongside Reservoir No. 1
Show everything served from this plant

Cincinnati Public Water System as a whole draws on: Ohio River (Miller Plant, ~88%) plus Great Miami Buried Valley Aquifer wells (~12%).

Cincinnati Public Water System is owned by a local government, with 244,716 service connections serving 750,200 people; it has substantially implemented source water protection under Ohio's program. Office: 513-591-7968 (SDWIS).

Bills, 2023: a household using 5,000 gallons a month paid about $378 a year for water ($32 a month; $239 at 2,500 gallons, $545 at 8,000) (Ohio EPA rate survey, inside-city rates).

Ohio EPA loans since 2016 for projects inside this ZIP: $621,000 across 1 project (drinking water $621K); largest: Cox Smith Road Water Main (Cincinnati, 2019, $621K).

Water bodies
Ohio River
Raw intakes
Cincinnati Miller Ohio River
Cincinnati Miller Ohio River S
Active wells
13
Serves
750,200 people · Hamilton County
EPA ID
OH3102612
cincinnati-oh.gov

About this area's water

Entrance to the River Pumping Station at Cincinnati Water Works' Kellogg Avenue Ohio River intake
Entrance to the River Pumping Station at Cincinnati Water Works' Kellogg Avenue Ohio River intakePhoto: https://www.loc.gov/pictures/item/oh0105.photos.127321p, Public domain · Wikimedia Commons
Did you know
  • The Richard Miller plant is one of only a few in the country that pairs granular activated carbon with ultraviolet disinfection, and the GAC is regenerated on site in the plant's own reactivation furnace.
  • Cincinnati's 1839 purchase of a private water company for $300,000 made it Ohio's first municipally owned water system.
  • Rather than bury the problem in a storage tunnel, MSD dug up a mile of the long-buried Lick Run stream as green infrastructure, cutting about 400 million gallons of overflow a year.
  • The city's two plants could hardly be more different: Miller filters river water through carbon and UV, while Bolton simply softens well water with lime.
History5
  • 1821The Front Street Pumping Station begins operating for the private Cincinnati Manufacturing Company, chartered in 1817; it served until Nov. 1907.
  • 1839On June 25 the City of Cincinnati buys the water works for $300,000, becoming Ohio's first municipally owned water utility.
  • 1907On Oct. 22 the 'New Works' on Kellogg Ave., begun in 1898 about ten miles upstream, starts continuous rapid-sand filtration.
  • 2009MSD begins implementing its federal Clean Water Act wet weather program, one of the largest public works efforts in the region's history.
  • 2024PFOA and PFOS at the Bolton groundwater plant test above EPA's new 4 ppt limits, starting a compliance push ahead of the 2029 deadline.
Treatment & pressure

How it is treated

About 88% of supply is Ohio River water treated at the Richard Miller plant by coagulation, flocculation, sedimentation, rapid sand filtration, granular activated carbon, UV light and chlorine, with fluoride. The other 12% is Bolton well water, lime softened and chlorinated, with no GAC.

Water pressure

Not published as a system average. GCWW serves a hilly, multi-elevation area with numerous pressure districts, pump stations and storage tanks.

What it costs

GCWW publishes an annual 'Cost of Your Water' residential rate sheet; we found no per-1,000-gallon rate or effective year on its website.

Water quality & impurities7
ContaminantLevelLimitYear
TTHM
Range 14.0-60.3. Below MCL, no violation.		49.6 ppb802024
HAA5
Range 2.0-13.2. Far below MCL, helped by GAC treatment.		9.9 ppb602024
Lead (90th percentile)
Two monitoring periods; well below the action level, though 1 of 107 first-period samples exceeded it.		1.12-2.32 ppb152024
Copper (90th percentile)
No sites above the action level in either monitoring period.		0.019-0.024 ppm1.32024
PFOA
Bolton groundwater plant only; above the new EPA MCL. Miller plant stays below.		up to 4.7 ppt42024
PFOS
Bolton plant only; above the new EPA MCL, compliance required by 2029.		up to 6.1 ppt42024
Fluoride
Range 0.72-0.96; added for dental health, well under the MCL.		0.90 ppm42024

EPA compliance record

Lead at the tap: 90th-percentile result 2.1 ppb in 2026 (action level 15 ppb).

EPA record: no health-based violations since 2015.

Projects & plans3

Recent and current work

  • Lick Run Greenway · 2021 · completed
    Daylighted a buried stream in South Fairmount; eliminates roughly 400 million gal/yr of combined sewer overflow to Mill Creek.
  • MSD Wet Weather Program (consent decree) · 2009-present · under construction
    Has cut annual sewer overflow volume from about 14 billion to 5.9 billion gallons systemwide.

Planned or needed

  • Bolton plant PFAS treatment · planned
    GCWW has grant money to study treatment options and says it will install whatever is needed to meet the 2029 PFAS standards.
Supply stress

The Ohio River source is high-volume and drought-resilient, and the Miller plant's GAC gives it a strong barrier against spills and PFAS. The live concern is the Bolton groundwater plant, where PFOA and PFOS exceed the new federal limits for roughly 12% of GCWW customers ahead of the 2029 deadline.

Sewers

Sanitary

The Metropolitan Sewer District of Greater Cincinnati (MSD), a county-city partnership, provides sanitary sewers and wastewater treatment. MSD works under a federal Clean Water Act consent decree and has been implementing its wet weather program since 2009 to cut combined sewer overflows into Mill Creek and other waterways.

Storm

Much of the older urban core uses combined sanitary/storm sewers. MSD's wet weather plan mixes green infrastructure like the Lick Run Greenway with conventional separation and storage to reduce overflow-driven flooding.

Sourcesverified
cincinnati-oh.govcincinnati-oh.govcincinnati-oh.govmsdgc.orgcincinnatimagazine.com

Compiled from the utility's own reports and public records, then independently re-checked against primary sources.

Water systems in this ZIP

13% of residents live outside every mapped system, most likely on private wells.

Source: U.S. EPA SDWIS and Community Water System Service Area Boundaries (v3, 2026), Ohio EPA primacy data, 2020 census blocks: the system serving most residents, traced through purchases to the treating utility; Ohio EPA 2023 Sewer and Water Rate Survey (Ohio State, May 2025) for household bills; Ohio EPA DEFA loan awards since 2016 for the loans paragraph · EPA SDWIS · EPA service area boundaries · Ohio EPA drinking water · Ohio EPA rate survey

Violationsnone since 2015, lead 2.1 ppbRadon3.8 pCi/L avg, 34% above 4Stream health79% of land drains to streams failing aquatic lifeNearest sewage plantCity of Lebanon Regional Wwtp, 4.3 mi, 1/12 quarters in violationGroundwaterDRASTIC 95, 235 well logsElectricDuke Energy OhioGas pipelinenearest transmission line 7.2 miNearest power plantMiddletown Energy Center 8.2 mi, 468 MW gasGasDuke Energy Ohio, 58% on gasSchool districtMason CitySocial vulnerability24th percentile in OhioUpward mobilityrank 48.2 for low-income childrenPeople63% with a degree, 20.8% born abroadJobs40K jobs hereSchool tax31.0 mills, ~$2,168 on a $200K homePhoneBrightspeedFlood1.6% in floodplainInternet100% served, fiber 87%Hazard risk46, above 46% of US tractsOil and gas wells1 in the ZIP, 0 producingSoilsRussell, septic not limitedAbandoned minesnone mappedSpills20 reported since 2021, mostly diesel and fuel oilDisasters7 tornado tracks within 5 mi, 16 FEMA declarationsDams11 high-hazard within 10 mi, nearest 0.8 miTraffic98K a day on I-71Bridges0 of 31 rated poorRail crossings10 public crossings, no daily trains reportedTransit1% within half a mile of a stopWalkability7.9 of 20, below averageAirportCVG 27.9 mi, Amtrak 20.3 miClimate14" snow, 54°F averageAlgal toxinsraw water up to 0.46 µg/LPFASnone detected at the Richard Miller Treatment PlantLead2.1 ppb at the 90th-percentile tap, 34,717 lead or galvanized lines, 45 unknownByproductsTTHM 39 µg/L (2019)Fluoridefluoridated, 8 treatment stepsWatershedLittle Miami, Muddy CreekLocal governmentMason (city)Cell signal5G on 100% of landU.S. HouseOH-1 Greg Landsman (D)Life expectancy83.4 yearsHealth13% fair or poor health, obesity 30%Nearest hospitalWest Chester Medical Center, 2.8 mi, 3★Toxic sitesSuperfund 4 mi away, 13 TRIToxic releases79,147 lb on site, 5 facilitiesAirPM2.5 6 µg/m³, monitor 5.5 miFire/EMSCity of Mason Fire Station 52, 1.3 miLibraryMason Public Library, 0.8 miGroceries52% over 1 mi from a supermarketEV chargersfast charger 2.9 mi, 7 stations hereHistorysettled 1803Historic placesnearest King, Ahimaaz, House, 3.8 miWetlands1.5% of land, 273 acresLand cover77% developed, 14% tree canopyParks6.6% public land, Stonelick State Park 15.2 miNursing homeMCV HEALTH CARE FACILITIES, INC, 0.9 mi, 5★PoliceMason Police Department, 0.6 miCrime0.4 violent per 1,000, Mason PoliceAquifer51% sensitive setting, karst-prone rockCollegeAveda Fredric's Institute-Cincinnati, 2.4 miSchool ratings5 stars, Mason CityHome prices$503K typical, +108% in ten yearsBuilding permits1,082 units 2016 to 2025 in MasonHomes and income$440K home, $133K incomeHouses17,831 homes (appraisal records)

Infrastructure in this ZIP

11.9 mi of highway (US 42, I-71, SR 741) · 5.86 mi of railroad (Indiana & Ohio Railway) · 1 transit route (Cincinnati Metro (SORTA)) · 23.4 mi of electric transmission line (Duke Energy, Duke Energy Ohio) · 83.2 mi of large water mains mapped (Greater Cincinnati Water Works, Warren County Water & Sewer) · 4.42 mi of interceptor sewer mapped (Warren County Water & Sewer) · 1 airfield or heliport (Mercy Kings Mills) · 4 dams (Samanna Dam, Pine Hill Lake Dam, Water's Edge Dam) · 8 substations · 11 grade crossings (Indiana & Ohio Railway) · 7 registered towers · 8 public EV charger listings · 1 landfill or waste site, open and closed (Klasmulch) · 3 hospitals (Lindner Center of Hope, Cincinnati Children's Hospital Medical Center at T, Mercy Health - Kings Mill Hospital) · 5 fire or EMS stations · 1 police station · 1 post office · 9 mapped water tanks, towers or pump stations (Socialville-Fosters Tank, Pine Hill Tank, Bethany Road Tank) · 11 water towers or tanks in OpenStreetMap · 1 water works or pumping station in OpenStreetMap · 1 data center (CyrusOne Cincinnati-Mason CIN3) · 5.15 mi of trail and bike route · 3 transit stops · 32 bridges and culverts in the inventory · 22 sites with underground fuel tanks in use · 2 open leaking-tank releases · 2 other permitted dischargers (Petrochoice Lubrication Solutions, Shadow Lake Mobile Home Park) · 2 source water protection zones (Kings Island PWS, Warren County) · 7 stormwater (MS4) permit areas (City of Lebanon, City of Mason, Turtlecreek Township) · 27 biosolids application fields (sludge from Mason WWTP No 2, Middletown WWTP) · 5 brownfield or cleanup sites · 4 broadcast transmitters (WFTK, WLW, W238BJ) · 4 tire or battery drop-off sites · 18 traffic signals.

Draw them34 layers on the map

Intakes and plants

Ohio River

Ohio River intake at the plant's riverfront on Kellogg Ave in the California neighborhood, east CincinnatiRichard Miller Treatment Plant · Cincinnati Public Water System · +1 more

Source: U.S. EPA SDWIS and Community Water System Service Area Boundaries (v3, 2026), Ohio EPA primacy data, 2020 census blocks: the system serving most residents, traced through purchases to the treating utility; Ohio EPA 2023 Sewer and Water… · EPA SDWIS · Ohio EPA source water protection

Full detail

Loading the full detail… Or open it on the map.

Violations

No health-based violations since 2015

No health-based violations since 2015Cincinnati Public Water System · lead 2.1 ppb (2026)

Source: EPA SDWIS (Envirofacts, pulled September 2026): health-based violations since 2015, all violations since 2020, lead and copper 90th-percentile results, for the system serving most of the ZIP · EPA SDWIS (Envirofacts) · EPA ECHO

Full detail

Loading the full detail… Or open it on the map.

Disinfection byproducts

20 to 40

TTHM 39 µg/L (2019)Cincinnati Public Water System · HAA5 9 · worst year 40

Source: EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019: total trihalomethanes and haloacetic acids (HAA5) sampled in the distribution system, nitrate, arsenic, combined radium, gross alpha and uranium at entry points; yearly means…

Full detail

Loading the full detail… Or open it on the map.

PFAS

No PFAS detected

No PFAS detectedCincinnati Public Water System · Richard Miller Treatment Plant · UCMR 5, 7 samples · Ohio EPA 2020

Source: EPA UCMR 5 occurrence data (final release, August 2026: 29 PFAS and lithium at 347 Ohio systems) and Ohio EPA statewide PFAS sampling 2019 to 2021 (1,479 systems), for the system serving most of each ZIP; Ohio EPA water treatment plant… · Ohio EPA PFAS

Full detail

Loading the full detail… Or open it on the map.

Lead

Under 5 ppb

Lead 2.1 ppb at the 90th-percentile tapCincinnati Public Water System · period ending 2026-06 · 34,717 of 238,335 service lines lead or galvanized, 45 unknown

Source: SDWIS lead and copper 90th-percentile tap results (Envirofacts) and EPA's service line inventory dashboard (2026 Q2 submissions), for the system serving most of each ZIP; Ohio Department of Health high-risk ZIP code list for childhood… · ODH childhood lead testing · ODH high-risk ZIP list (CCBH PDF) · Ohio EPA lead and copper · H2Ohio

Full detail

Loading the full detail… Or open it on the map.

Fluoride and treatment

Fluoridated

FluoridatedCincinnati Public Water System · corrosion control, coagulation and settling, chlorine disinfection, iron and manganese removal

Source: CDC My Water's Fluoride (fluoridation status of each system as reported by the Ohio Department of Health, fetched 2026-09-10); SDWIS treatment table (Envirofacts): each system's registered treatment steps, inherited from the supplier for… · EPA SDWIS search

Full detail

Loading the full detail… Or open it on the map.

Algal toxins

Under 5 µg/L in raw water

Raw water up to 0.46 µg/L microcystinCincinnati Public Water System · 2019-10

Source: Ohio EPA public water system harmful algal bloom monitoring (geo.epa.ohio.gov DrinkingWater/HAB): microcystin results in raw and treated water since 2016 for surface-water systems, for the system serving most of each ZIP · Ohio EPA HAB information for public water systems

Full detail

Loading the full detail… Or open it on the map.

Groundwater

DRASTIC index under 100

DRASTIC 95 · Limestone and Shale235 well logs · median 70 ft deep · 2 karst and spring points

Source: ODNR Division of Geological Survey: DRASTIC groundwater vulnerability polygon at each ZIP's population center, mapped karst features, and the state water well log inventory (about 655,000 logs) counted inside each ZIP; ODNR glacial… · ODNR Geological Survey · Ohio EPA GIS services · USGS water data

Full detail

Loading the full detail… Or open it on the map.

Aquifer

30 to 60%

51% sensitive geologic settingkarst-prone bedrock at the center · 1 verified sinkhole · under 0.5% wellhead protection

Source: Ohio EPA Sensitive Geologic Settings (geology/Geology layer 0) intersected with ZCTA polygons; ODNR karst geology at the ZIP center (layer 7, point query) and karst and spring points (layer 5); Ohio EPA source water protection areas… · Ohio EPA geology layers · Ohio EPA source water protection (SWAP) · ODNR Geological Survey

Full detail

Loading the full detail… Or open it on the map.

Sewage plants

1 to 3 quarters with a violation

City of Lebanon Regional Wwtp · 4.3 mi1 of 12 quarters in violation · 6 MGD

Source: EPA ECHO Clean Water Act facilities, Ohio NPDES permits with a publicly owned treatment works component, plants of 0.1 MGD or more or designated major: nearest plant, design flow, significant-noncompliance status, quarters in… · EPA ECHO · EPA CSO inventory · Ohio EPA GIS services · EPA Facility Finder

Full detail

Loading the full detail… Or open it on the map.

Stream health

Three quarters or more

79% of the land drains to streams failing aquatic lifeMuddy Creek · bacteria (pathogens), sediment and silt

Source: EPA ATTAINS, Ohio 2024 Integrated Report assessment units (1,545 watershed polygons) overlaid on ZCTAs in Albers equal-area with the Lake Erie units clipped out: share of land in units not supporting aquatic life, recreation, fish… · EPA ATTAINS · Ohio integrated report · Ohio sport fish advisory · Ohio EPA advisory map

Full detail

Loading the full detail… Or open it on the map.

Watershed

Drains to the Ohio River

Little Miami subbasinMuddy Creek · drains to the Ohio River

Source: USGS Watershed Boundary Dataset: HUC-8 subbasins by resident share (2020 census blocks) and the HUC-12 subwatershed at each ZIP's population-weighted center with its downstream chain; USGS county water use 2015 (Dieter and others 2018) for… · USGS watershed boundaries · EPA EnviroAtlas · Ohio EPA 401 map · ODNR Water Withdrawal Atlas (archived copy) · USGS county water use 2015 · ODNR H2Ohio projects · ODNR Lake Erie Coastal Management Area · Ohio EPA source water protection (SWAP) · Ohio EPA nine-element plans · Ohio EPA 319, GLRI and SWIF project lists · Ohio EPA chloride reduction grants · NOAA Lake Erie water levels

Full detail

Loading the full detail… Or open it on the map.

Home

The houses themselves and what they cost: who lives in them, what a typical one looks like down to the parcel record, how much new housing has gone up, and what a household pays in property tax.

Homes and income

$350,000 and up

Median home $440,000household income $133,240 · rent $1,811 · 78% own

Source: Census ACS 2020-2024 5-year by ZCTA: median home value, median gross rent, median household income, owner share, median year built; Eviction Lab tract estimates 2016 to 2018 (Gromis and others 2022), population-weighted to ZIPs; HUD fiscal… · Census ACS · Eviction Lab · HUD data · IRS ZIP statistics · Mapping Inequality · HUD eGIS open data · FDIC BankFind · NCUA call report data

Full detail

Loading the full detail… Or open it on the map.

House by house

No data

Appraisal records without year built17,831 homes

Source: Residential parcels (Ohio land-use classes 500 to 599, apartments 401 to 403, farmhouses) placed in ZIPs by scripts/join_parcels.py on 2026-09-15, the houses loading on demand; county auditors' appraisal records, house by house (year… · Warren County Auditor

Full detail

Loading the full detail… Or open it on the map.

Building permits

30 to 60

1,082 housing units permitted 2016 to 2025Mason · 31.5 per 1,000 residents · 101 in 2025

Source: Census Bureau Building Permits Survey, annual place files 2016 to 2025: new privately owned housing units, buildings and construction value authorized by each Ohio permit office, given to each ZIP through the jurisdiction where most of its… · Census building permits

Full detail

Loading the full detail… Or open it on the map.

Home prices

100 to 150%

+108% in ten years+69% in five · +4% in 2025

Source: FHFA House Price Index, annual five-digit ZIP all-transactions series (repeat sales and refinance appraisals of conforming-mortgage homes, developmental, not seasonally adjusted): ten-, five- and one-year changes and the level against… · FHFA house price index · Zillow research data · Realtor.com data

Full detail

Loading the full detail… Or open it on the map.

School tax

30 to 40 mills

31.0 effective school millsMason City · about $2,168 a year on a $200,000 home

Source: Ohio Department of Taxation, Aggregate Property Tax Rates by School District, tax year 2025 (DTE 515), joined by IRN and weighted by each ZIP's residents in every district; school levies only; Ohio Department of Taxation The Finder rate… · Ohio tax data series · The Finder

Full detail

Loading the full detail… Or open it on the map.

Utilities and getting around

The companies and networks that keep a house running and a resident moving: electric, gas, phone and internet service, and the roads, transit, rail and airports around it.

Electric

Duke Energy Ohio

Duke Energy OhioInvestor-owned utility

Source: PUCO certified electric territories via ODOT plus HIFLD municipal systems (EIA-861) with ODOT corporate limits; EIA-861 reliability (outages), sales to ultimate customers (residential prices and bills), net metering and advanced meters by… · PUCO electricity · ODOT territories service · EIA-861 · DOE LEAD Tool · HIFLD retail service territories

Full detail

Loading the full detail… Or open it on the map.

Gas

Duke Energy Ohio

Duke Energy OhioPUCO-regulated utility · 58% of homes heat with utility gas

Source: PUCO 2026 county map of gas distribution companies, HIFLD/EIA-176 territory polygons, ACS 2020-2024 heating fuel · PUCO natural gas · HIFLD

Full detail

Loading the full detail… Or open it on the map.

Power plants

5 to 10 miles

Middletown Energy Center · 8.2 migas, 468 MW · 3 plants within 10 miles

Power plants within 10 miles

  1. Middletown Energy Center 100 MW or moreNatural gas · 468 MW · 8.2 mi
    Capacity
    468 MW
    Main source
    Natural gas
    Technology
    Natural Gas Fired Combined Cycle
    Operator
    Ohio Power Partners, LLC
    Sector
    IPP Non-CHP
    Where
    Middletown, Butler County
    Generating units
    2
    Built
    2018
    EIA plant code
    59326

    EIA plant page ↗ EIA-860 (source) ↗ Street map and directions ↗

  2. Dick's Creek 100 MW or moreNatural gas · 136 MW · 8.7 mi
    Capacity
    136 MW
    Main source
    Natural gas
    Technology
    Natural Gas Fired Combustion Turbine
    Operator
    Luminant Dick's Creek
    Sector
    IPP Non-CHP
    Where
    Monroe, Butler County
    Generating units
    4
    Built
    1965 (first unit); newest unit 1969
    EIA plant code
    2831

    EIA plant page ↗ EIA-860 (source) ↗ Street map and directions ↗

  3. Middletown Coke Company, LLCOther · 38 MW · 9.6 mi
    Capacity
    38 MW
    Main source
    Other
    Technology
    Other Gases
    Operator
    SunCoke Energy, Inc.
    Sector
    IPP CHP
    Where
    Middletown, Butler County
    Generating units
    1
    Built
    2011
    EIA plant code
    57822

    EIA plant page ↗ EIA-860 (source) ↗ Street map and directions ↗

Source: EIA-860 power plant inventory via HIFLD (February 2025), with plant codes, units and years from EIA-860 2025. Miles are straight-line from the ZIP's population-weighted center, as the card above measures them.

Source: EIA-860 power plant inventory via HIFLD (202 Ohio plants, February 2025): nearest plant, nearest plant of 100 MW or more, plants and capacity by fuel within 10 miles; USGS U.S. Wind Turbine Database (June 2026) and U.S. Large-Scale Solar… · EIA-860 · HIFLD · USGS wind turbines · USGS solar · NRC emergency planning zones

Full detail

Loading the full detail… Or open it on the map.

Pipelines

3 to 10 miles

Nearest transmission line 7.2 miTexas Gas Transmission Co (interstate)

Source: EIA natural gas interstate and intrastate transmission pipelines via Esri's Federal User Community copy on ArcGIS Online (data last updated July 2025; 1,239 segments in and around Ohio): miles inside each ZIP by operator, distance from the… · EIA U.S. Energy Atlas · ArcGIS Online item

Full detail

Loading the full detail… Or open it on the map.

Phone

Brightspeed (formerly CenturyLink)

BrightspeedIncumbent telephone company

Source: PUCO Telecom map service, layer 7 ILEC Company Service Area (incumbent local exchange carriers, fetched 2026-09-08) by resident share of 2020 census blocks · PUCO telephone

Full detail

Loading the full detail… Or open it on the map.

Internet

Under 2% lack 100/20 service

100% can get 100/20 Mbpsfiber 87% · cable 98% · 17,386 locations

Source: FCC Broadband Data Collection, June 2024, fixed availability by H3 hexagon (Esri Living Atlas, Ohio subset); Census ACS 2020-2024 table B28002 internet subscriptions; Ookla Open Data fixed speed tests 2025 Q2 by tile, averaged inside the… · FCC broadband map · Ookla open data · Census ACS

Full detail

Loading the full detail… Or open it on the map.

Cell signal

5G nearly everywhere

5G on 100% of the land4G or better 100% · AT&T 100% · T-Mobile 100% · Verizon 100%

Source: FCC Mobile Broadband Data Collection, carrier-reported 4G LTE and 5G coverage by H3 hexagon (Esri Living Atlas layer last updated 24 November 2025, most likely the June 30, 2025 filing round), fetched 2026-09-08; FCC Antenna Structure… · FCC broadband map · FCC antenna registration · Ookla open data

Full detail

Loading the full detail… Or open it on the map.

EV chargers

2 to 5 miles

Fast charger 2.9 mi: Innovatures7 public stations in the ZIP (24 Level 2, 0 DC fast ports) · 20 within 5 miles of its center

Public EV charging inside ZIP 45040

  1. City of Mason Public Parking Lot2 Level 2 · Mason · 0.8 mi
    Address
    213 West Main Street, Mason, OH 45040
    Ports
    2 Level 2
    Plugs
    J1772
    Network
    Blink Network
    Hours
    24 hours daily
    Phone
    888-998-2546

    Station Locator (NREL) ↗ Alternative Fuels Data Center (source) ↗ Street map and directions ↗

  2. SCC. SCC MASON SOUTH4 Level 2 · Mason · 2.6 mi
    Address
    5386 Courseview Dr, Mason, OH 45040
    Ports
    4 Level 2
    Plugs
    J1772
    Network
    ChargePoint Network
    Hours
    24 hours daily
    Phone
    888-758-4389

    Station Locator (NREL) ↗ Alternative Fuels Data Center (source) ↗ Street map and directions ↗

  3. Palmera Apartments6 Level 2 · Mason · 3.0 mi
    Address
    6965 Palmera Dr, Mason, OH 45040
    Ports
    6 Level 2
    Plugs
    J1772
    Network
    FLO
    Hours
    24 hours daily
    Phone
    888-356-8911

    Station Locator (NREL) ↗ Alternative Fuels Data Center (source) ↗ Street map and directions ↗

  4. Holiday Inn Express And Suites Cincinnati-Mason - Tesla Destination4 Level 2 · Mason · 3.3 mi
    Address
    5100 Natorp Blvd, Mason, OH 45040
    Ports
    4 Level 2
    Plugs
    J1772
    Network
    Tesla Destination
    Phone
    877-798-3752

    Station Locator (NREL) ↗ Alternative Fuels Data Center (source) ↗ Street map and directions ↗

  5. HP Gov Pointe4 Level 2 · Mason · 3.3 mi
    Address
    4605 Duke Drive, Mason, OH 45040
    Ports
    4 Level 2
    Plugs
    J1772
    Network
    Blink Network
    Hours
    24 hours daily
    Phone
    888-998-2546

    Station Locator (NREL) ↗ Alternative Fuels Data Center (source) ↗ Street map and directions ↗

  6. Latitude - 5265 Natorp2 Level 2 · Mason · 3.4 mi
    Address
    5265 Natrop Blvd, Mason, OH 45040
    Ports
    2 Level 2
    Plugs
    J1772
    Network
    FLO
    Hours
    24 hours daily
    Phone
    888-356-8911

    Station Locator (NREL) ↗ Alternative Fuels Data Center (source) ↗ Street map and directions ↗

  7. Latitude - 5245 Natorp2 Level 2 · Mason · 3.4 mi
    Address
    5245 Natrop Blvd, Mason, OH 45040
    Ports
    2 Level 2
    Plugs
    J1772
    Network
    FLO
    Hours
    24 hours daily
    Phone
    888-356-8911

    Station Locator (NREL) ↗ Alternative Fuels Data Center (source) ↗ Street map and directions ↗

Source: NREL Alternative Fuels Data Center station list (May 2026), public and open stations, the posts at one address counted as one site. Miles are straight-line from the ZIP's population-weighted center.

Source: NREL Alternative Fuels Data Center station list as of May 29, 2026 (USDOT BTS copy: 2,136 Ohio electric stations, of which the 1,850 public and open are used, NREL restricted-access records such as dealer-service and hotel-guest chargers… · Alternative Fuels Data Center · BTS Alternative Fueling Stations (NTAD)

Full detail

Loading the full detail… Or open it on the map.

Transit

Under 10% of residents

1% within half a mile of a stop3 stops in the ZIP · Cincinnati Metro (SORTA)

None inside the ZIP; the nearest station or terminal

  1. curbside bus stopIntercity bus stop · Sharonville · 5.7 mi
    What it is
    Intercity bus stop
    City
    Sharonville
    Coordinates
    39.29197, -84.39397

    BTS Intermodal Passenger Connectivity Database (source) ↗ Street map and directions ↗

Source: BTS Intermodal Passenger Connectivity Database and National Transit Map (2025). Bus stops are counted on the card and drawn on the full map. Miles are straight-line from the ZIP's population-weighted center.

Source: USDOT BTS National Transit Map stops (National Transportation Atlas Database, 2025 vintage, fetched September 2026), plus the Springfield, Lancaster-Fairfield, Knox County Transit, WayGo and BGSU Shuttle GTFS feeds: share of residents… · BTS National Transit Map · BTS transportation atlas · Springfield City Area Transit GTFS feed · Lancaster-Fairfield Public Transit GTFS feed · Knox County Transit GTFS feed · WayGo GTFS feed · BGSU Shuttle GTFS feed

Full detail

Loading the full detail… Or open it on the map.

Walkability

Below average (5.76 to 10.5)

Walkability 7.9 of 2045 intersections per square mile · 8% near transit

Source: EPA National Walkability Index (Smart Location Database 3.0, 2021) by block group, population-weighted to ZIPs through 2020 census block points; car-free household share from Census ACS 2020 to 2024 table B25044, or where missing the Smart… · EPA walkability index · Smart Location Database · Census ACS

Full detail

Loading the full detail… Or open it on the map.

Rail crossings

4 to 10

10 public crossings3 gated · no daily trains reported · Indiana & Ohio Railway

Source: FRA Grade Crossing Inventory (current records, Ohio): open at-grade crossings inside each ZIP, gates, trains a day at the busiest, timetable speed, railroads; nearest crossing to the population-weighted center; FRA highway-rail grade… · FRA crossing inventory (Form 71, current) · FRA crossing incidents (Form 57) · FRA rail equipment accidents (Form 54) · FRA safety data · DOT open data

Full detail

Loading the full detail… Or open it on the map.

Bridges

No bridge rated poor

31 bridges, 0 rated poortypical build year 1994 · busiest Wesrtrn Row Road, 40,198 vehicles a day

Source: FHWA National Bridge Inventory 2025 (26,713 Ohio structures; 26,616 fall inside a ZIP area and are counted, the other 97 land outside every ZIP polygon): bridges inside each ZIP, poor-condition ratings, ages, traffic · FHWA bridge inventory · ODOT TIMS bridge inventory (live)

Full detail

Loading the full detail… Or open it on the map.

Traffic

50,000 to 100,000

97,616 vehicles a day on I-719,079 trucks · 1.2M vehicle-miles a day inside the ZIP

Source: ODOT traffic count segments (2025 annual average daily traffic by road segment, ODOT Transportation Information Mapping System): segments assigned to the ZIP holding their midpoint; NHTSA Fatality Analysis Reporting System 2020 to 2024… · ODOT TIMS traffic count segments · NHTSA FARS

Full detail

Loading the full detail… Or open it on the map.

Airports and Amtrak

15 to 30 miles

CVG · 27.9 miCincinnati / Northern Kentucky International · Amtrak at Cincinnati 20.3 mi

Source: FAA airport facilities (NASR landing-facility record) and Amtrak stations via USDOT BTS National Transportation Atlas Database, fetched September 2026: nearest airport with scheduled airline service (Part 139 class I), nearest public-use… · BTS transportation atlas

Full detail

Loading the full detail… Or open it on the map.

Land, air and risk

The ground itself and what can go wrong on it: radon, flood risk, air quality, old mines and wells, and the parks, wetlands and open land still left.

Radon

2 to 4 pCi/L

3.8 pCi/L average radon5,757 tests · 34% above 4 pCi/L · median 2.5

Source: Ohio Department of Health radon test results by ZIP code since 2010 (pre-mitigation), ZIPs with five or more tests · ODH radon program

Full detail

Loading the full detail… Or open it on the map.

Flood

Under 2% of residents

1.6% of residents in the 1% floodplain3% of the land is floodplain, 1% more in the 0.2% zone · zone AE

Source: FEMA National Flood Hazard Layer, flood hazard zones, fetched 2026-09-08; OpenFEMA NFIP redacted claims for Ohio (frozen June 2026), by reported ZIP; USGS NWIS annual peak flows for the nearest active stream gauge; NOAA Atlas 14… · FEMA flood hazard layer · FEMA Map Service Center · OpenFEMA · NOAA Atlas 14 · USGS stream gauges

Full detail

Loading the full detail… Or open it on the map.

Hazard risk

40 to 60

Risk score 46 · higher than about 46% of US tractsIce storm 89 · Lightning 81

Source: FEMA National Risk Index, census tracts, December 2025 release, population-weighted to ZIPs · FEMA National Risk Index · NRI census tract layer (ArcGIS)

Full detail

Loading the full detail… Or open it on the map.

Climate

Under 20 inches of snow a year

14" of snow a year · 53.8°F averageJanuary low 22° · July high 87° · 45" of precipitation

Source: NOAA NCEI 1991-2020 U.S. Climate Normals, annual and monthly, 261 Ohio stations; each ZIP takes the nearest station reporting each element from its population-weighted center; U.S. Drought Monitor weekly county statistics 2000 to 2026… · NOAA climate normals · NOAA climate at a glance · U.S. Drought Monitor

Full detail

Loading the full detail… Or open it on the map.

Air

Under 7.5 µg/m³ PM2.5

PM2.5 6 µg/m³ at Sycamore, 5.5 miozone 70 ppb at Sycamore · Warren County median AQI 44

Source: EPA Air Quality System 2025 annual summaries: nearest PM2.5 and ozone monitors from each ZIP's population-weighted center, county AQI day counts; EPA ECHO Clean Air Act permitted sources in Ohio (air_rest_services, September 2026); EPA… · EPA air data files · EPA AirToxScreen · EPA Green Book · EPA ECHO

Full detail

Loading the full detail… Or open it on the map.

Toxic sites

3 to 8 miles

Nearest NPL site 4 mi: Peters Cartridge Factory13 toxic-release reporters · 1 Superfund program site in the ZIP

Superfund sites inside ZIP 45040

  1. Mason Road Lead SiteSuperfund program · Mason · 1.5 mi
    Address
    4631 Hickory Woods Drive, Mason, OH 45040
    County
    Warren County
    Status
    Superfund program site, not on the National Priorities List
    EPA program ID
    OHN000509181
    EPA registry ID
    110017945410

    EPA facility record ↗ EPA Facility Registry Service (source) ↗ Street map and directions ↗

Source: EPA Facility Registry Service, Superfund (SEMS) and National Priorities List sites. Many program sites were assessed and needed no cleanup. Miles are straight-line from the ZIP's population-weighted center.

Source: EPA Facility Registry Service: Superfund NPL and SEMS sites, Toxics Release Inventory reporters (EPA geoplatform), fetched 2026-09-08; the nearest NPL site also considers sites in PA, WV, KY, IN and MI within about 20 miles of the border… · EPA Facility Registry · EPA Superfund sites · Ohio EPA cleanup sites · EPA UST Finder · EPA ECHO

Full detail

Loading the full detail… Or open it on the map.

Toxic releases

10,000 to 100,000 lb

79,147 lb released on site in 20245 facilities · Mauser - Mason

Facilities reporting toxic releases inside ZIP 45040

  1. Hamilton Products Group, IncToxics Release Inventory · Mason · 0.5 mi
    Address
    755 Reading Rd, Mason, OH 45040
    County
    Warren County
    Status
    Reports to the Toxics Release Inventory (active)
    EPA program ID
    45040HMLTN755RE
    EPA registry ID
    110006428838

    EPA facility record ↗ EPA Facility Registry Service (source) ↗ Street map and directions ↗

  2. Portion Pac IncToxics Release Inventory · Mason · 1.3 mi
    Address
    7325 Snider Rd., Mason, OH 45040
    County
    Warren County
    Status
    Reports to the Toxics Release Inventory (active)
    EPA program ID
    45040PRTNP7325S
    EPA registry ID
    110000392469

    EPA facility record ↗ EPA Facility Registry Service (source) ↗ Street map and directions ↗

  3. Armor Metal GroupToxics Release Inventory · Mason · 1.6 mi
    Address
    4600 Mason Montgomery Road, Mason, OH 45040
    County
    Warren County
    Status
    Reports to the Toxics Release Inventory (active)
    EPA program ID
    45040MLDCR4600M
    EPA registry ID
    110000815618

    EPA facility record ↗ EPA Facility Registry Service (source) ↗ Street map and directions ↗

  4. Cincinnati Fan and Ventilator CompanyToxics Release Inventory · Mason · 1.6 mi
    Address
    7697 Snider Rd, Mason, OH 45040
    County
    Warren County County
    Status
    Reports to the Toxics Release Inventory (***unchanged***)
    EPA program ID
    4504WCNCNN7697S
    EPA registry ID
    110071140747

    EPA facility record ↗ EPA Facility Registry Service (source) ↗ Street map and directions ↗

  5. Bonsal American Inc This Facility Closed As of 11/30/2010Toxics Release Inventory · Mason · 1.7 mi
    Address
    7300 Indl. Row Dr., Mason, OH 45040
    County
    Warren County
    Status
    Reports to the Toxics Release Inventory (closed)
    EPA program ID
    45040WRBNS7300I
    EPA registry ID
    110002112767

    EPA facility record ↗ EPA Facility Registry Service (source) ↗ Street map and directions ↗

  6. Air Plastics Inc.Toxics Release Inventory · Mason · 1.9 mi
    Address
    1224 Castle Dr., Mason, OH 45040
    County
    Warren County
    Status
    Reports to the Toxics Release Inventory (active)
    EPA program ID
    45040RPLST1224C
    EPA registry ID
    110000392478

    EPA facility record ↗ EPA Facility Registry Service (source) ↗ Street map and directions ↗

  7. Berenfield Containers IncToxics Release Inventory · Mason · 1.9 mi
    Address
    1229 - 1234 Castle Dr, Mason, OH 45040
    County
    Warren County
    Status
    Reports to the Toxics Release Inventory (open)
    EPA program ID
    45040BRNFL1229C
    EPA registry ID
    110000392432

    EPA facility record ↗ EPA Facility Registry Service (source) ↗ Street map and directions ↗

  8. Jw Harris Co Inc Dba Harris Products GroupToxics Release Inventory · Mason · 1.9 mi
    Address
    4501 Quality Pl, Mason, OH 45040
    County
    Warren County
    Status
    Reports to the Toxics Release Inventory (active)
    EPA program ID
    45040JWHRR4501X
    EPA registry ID
    110004735706

    EPA facility record ↗ EPA Facility Registry Service (source) ↗ Street map and directions ↗

  9. L-3 Communications Cincinnati ElectronicsToxics Release Inventory · Mason · 2.0 mi
    Address
    7500 Innovation Way, Mason, OH 45040
    County
    Warren County
    Status
    Reports to the Toxics Release Inventory (open)
    EPA program ID
    45040CNCNN75INN
    EPA registry ID
    110000815404

    EPA facility record ↗ EPA Facility Registry Service (source) ↗ Street map and directions ↗

  10. Cincinnati Electronics CorpToxics Release Inventory · Mason · 2.0 mi
    Address
    7500 Innovation Way, Mason, OH 45040
    County
    Warren County County
    Status
    Reports to the Toxics Release Inventory (***unchanged***)
    EPA program ID
    4504WCNCNN75INN
    EPA registry ID
    110068741552

    EPA facility record ↗ EPA Facility Registry Service (source) ↗ Street map and directions ↗

  11. Reliance Medical Products Inc.Toxics Release Inventory · Mason · 2.0 mi
    Address
    3535 Kings Mills Rd, Mason, OH 45040
    County
    Warren County
    Status
    Reports to the Toxics Release Inventory (active)
    EPA program ID
    45040RLNCM3535K
    EPA registry ID
    110004685029

    EPA facility record ↗ EPA Facility Registry Service (source) ↗ Street map and directions ↗

  12. Mitsubishi Electric Automotive America (1483090295)Toxics Release Inventory · Mason · 2.2 mi
    Address
    4773 Bethany Rd., Mason, OH 45040
    County
    Warren County
    Status
    Reports to the Toxics Release Inventory (open)
    EPA program ID
    45040MTSBS4773B
    EPA registry ID
    110000392450

    EPA facility record ↗ EPA Facility Registry Service (source) ↗ Street map and directions ↗

  13. Epic TechnologiesToxics Release Inventory · Mason · 2.8 mi
    Address
    4240 Irwin Simpson Rd, Mason, OH 45040
    County
    Warren County
    Status
    Reports to the Toxics Release Inventory (active)
    EPA program ID
    4504WPCTCH424IR
    EPA registry ID
    110060261899

    EPA facility record ↗ EPA Facility Registry Service (source) ↗ Street map and directions ↗

Source: EPA Facility Registry Service, Toxics Release Inventory reporters. Reporting a release is required of large users of listed chemicals; it is not by itself a violation. Miles are straight-line from the ZIP's population-weighted center.

Source: EPA Toxics Release Inventory basic data files, Ohio, reporting years 2020 to 2024 (2024 shown, 2020 for the trend); facilities placed in the ZCTA holding their coordinates; dioxin rows reported in grams left out of pound totals · EPA TRI data files

Full detail

Loading the full detail… Or open it on the map.

Dams

11 or more high-hazard dams

11 high-hazard dams within 10 milesNearest: Pine Hill Lake Dam, 0.8 mi, condition satisfactory

High-hazard dams within 10 miles

  1. Pine Hill Lake DamTributary To Muddy Creek · condition: satisfactory · 0.8 mi
    Hazard class
    High: a failure would probably cost a life
    Condition
    Satisfactory (assessed 03/18/2025)
    River or stream
    Tributary To Muddy Creek
    Purpose
    Recreation
    Type
    Earth
    Height
    31 ft
    Storage
    194 acre-feet
    Owner type
    Local Government
    County
    Warren County
    Nearest town (NID)
    Mason
    Last inspection
    04/03/2024
    Emergency action plan
    Yes
    NID ID
    OH00542

    National Inventory of Dams record ↗ National Inventory of Dams (source) ↗ Street map and directions ↗

  2. Landen Farm Lake DamSimpson Creek · condition: satisfactory · 3.1 mi
    Hazard class
    High: a failure would probably cost a life
    Condition
    Satisfactory (assessed 03/13/2025)
    River or stream
    Simpson Creek
    Purpose
    Recreation
    Type
    Earth
    Height
    40 ft
    Storage
    1,400 acre-feet
    Completed
    1975
    Owner type
    Private
    County
    Warren County
    Nearest town (NID)
    Foster
    Last inspection
    05/08/2024
    Emergency action plan
    Yes
    NID ID
    OH00540

    National Inventory of Dams record ↗ National Inventory of Dams (source) ↗ Street map and directions ↗

  3. Sunrise Lake DamTributary To Bear Run · condition: satisfactory · 4.5 mi
    Hazard class
    High: a failure would probably cost a life
    Condition
    Satisfactory (assessed 02/17/2025)
    River or stream
    Tributary To Bear Run
    Purpose
    Recreation
    Type
    Earth
    Height
    54 ft
    Storage
    257 acre-feet
    Completed
    1931
    Owner type
    Private
    County
    Warren County
    Nearest town (NID)
    Foster
    Last inspection
    05/01/2024
    Emergency action plan
    Yes
    NID ID
    OH00533

    National Inventory of Dams record ↗ National Inventory of Dams (source) ↗ Street map and directions ↗

  4. Swan Lake DamTributary To Mill Creek · condition: satisfactory · 5.4 mi
    Hazard class
    High: a failure would probably cost a life
    Condition
    Satisfactory (assessed 06/10/2021)
    River or stream
    Tributary To Mill Creek
    Purpose
    Recreation
    Type
    Earth
    Height
    18 ft
    Storage
    38 acre-feet
    Completed
    1953
    Owner type
    Private
    County
    Butler County
    Nearest town (NID)
    Evendale
    Last inspection
    06/10/2021
    Emergency action plan
    Yes
    NID ID
    OH01294

    National Inventory of Dams record ↗ National Inventory of Dams (source) ↗ Street map and directions ↗

  5. Stonegate Pond DamTributary · condition: fair · 6.0 mi
    Hazard class
    High: a failure would probably cost a life
    Condition
    Fair (assessed 06/10/2021)
    River or stream
    Tributary
    Purpose
    Recreation
    Type
    Earth
    Height
    21 ft
    Storage
    36 acre-feet
    Completed
    1985
    Owner type
    Private
    County
    Butler County
    Nearest town (NID)
    Evendale
    Last inspection
    06/10/2021
    Emergency action plan
    No
    NID ID
    OH01292

    National Inventory of Dams record ↗ National Inventory of Dams (source) ↗ Street map and directions ↗

  6. Kreis DamSharon Creek · condition: fair · 6.0 mi
    Hazard class
    High: a failure would probably cost a life
    Condition
    Fair (assessed 05/20/2021)
    River or stream
    Sharon Creek
    Purpose
    Recreation
    Type
    Masonry
    Height
    37 ft
    Storage
    946 acre-feet
    Completed
    1936
    Owner type
    Local Government
    County
    Hamilton County
    Nearest town (NID)
    Sharonville
    Last inspection
    05/20/2021
    Emergency action plan
    Yes
    NID ID
    OH00191

    National Inventory of Dams record ↗ National Inventory of Dams (source) ↗ Street map and directions ↗

  7. Sharonville Retention DamTributary To Sharon Creek · condition: fair · 7.1 mi
    Hazard class
    High: a failure would probably cost a life
    Condition
    Fair (assessed 05/27/2021)
    River or stream
    Tributary To Sharon Creek
    Purpose
    Flood Risk Reduction
    Type
    Earth
    Height
    46 ft
    Storage
    256 acre-feet
    Completed
    1967
    Owner type
    Local Government
    County
    Hamilton County
    Nearest town (NID)
    Sharonville
    Last inspection
    05/27/2021
    Emergency action plan
    Yes
    NID ID
    OH00991

    National Inventory of Dams record ↗ National Inventory of Dams (source) ↗ Street map and directions ↗

  8. Shaker Run DamShaker Creek · condition: fair · 7.2 mi
    Hazard class
    High: a failure would probably cost a life
    Condition
    Fair (assessed 05/06/2021)
    River or stream
    Shaker Creek
    Purpose
    Recreation;Water Supply
    Type
    Earth
    Height
    90 ft
    Storage
    6,124 acre-feet
    Completed
    1973
    Owner type
    Private
    County
    Warren County
    Nearest town (NID)
    Oakland
    Last inspection
    05/06/2021
    Emergency action plan
    Yes
    NID ID
    OH00553

    National Inventory of Dams record ↗ National Inventory of Dams (source) ↗ Street map and directions ↗

  9. Classicway Farm Lake Dam PoorTributary To Little Miami River · condition: poor · 7.9 mi
    Hazard class
    High: a failure would probably cost a life
    Condition
    Poor (assessed 04/18/2019)
    River or stream
    Tributary To Little Miami River
    Purpose
    Recreation
    Type
    Earth
    Height
    24 ft
    Storage
    73 acre-feet
    Completed
    1965
    Owner type
    Private
    County
    Warren County
    Nearest town (NID)
    South Lebanon
    Last inspection
    05/01/2024
    Emergency action plan
    No
    NID ID
    OH00532

    National Inventory of Dams record ↗ National Inventory of Dams (source) ↗ Street map and directions ↗

  10. Clermont Golf Limited Lake DamBares Run · condition: fair · 8.4 mi
    Hazard class
    High: a failure would probably cost a life
    Condition
    Fair (assessed 04/28/2025)
    River or stream
    Bares Run
    Purpose
    Water Supply;Recreation
    Type
    Earth
    Height
    37 ft
    Storage
    325 acre-feet
    Completed
    1997
    Owner type
    Private
    County
    Clermont County
    Nearest town (NID)
    Edenton
    Last inspection
    09/16/2024
    Emergency action plan
    Yes
    NID ID
    OH00271

    National Inventory of Dams record ↗ National Inventory of Dams (source) ↗ Street map and directions ↗

  11. Marge Schott Lake DamTributary To The Little Miami · condition: satisfactory · 9.5 mi
    Hazard class
    High: a failure would probably cost a life
    Condition
    Satisfactory (assessed 01/24/2025)
    River or stream
    Tributary To The Little Miami
    Purpose
    Recreation
    Type
    Earth
    Height
    140 ft
    Storage
    534 acre-feet
    Completed
    2000
    Owner type
    Private
    County
    Clermont County
    Nearest town (NID)
    Milford
    Last inspection
    06/05/2024
    Emergency action plan
    Yes
    NID ID
    OH03006

    National Inventory of Dams record ↗ National Inventory of Dams (source) ↗ Street map and directions ↗

Source: U.S. Army Corps of Engineers National Inventory of Dams, August 2026. "High hazard" rates what a failure would cost downstream, not how likely one is; the condition is the state's assessment. Miles are straight-line from the ZIP's population-weighted center, as the card above measures them.

Source: U.S. Army Corps of Engineers National Inventory of Dams (1,376 Ohio dams, August 2026; 26 Corps levees and dikes counted with their parent dam): high-hazard dams near each ZIP's population-weighted center, with the state's condition… · National Inventory of Dams

Full detail

Loading the full detail… Or open it on the map.

Disasters

6 to 10

7 tornado tracks within 5 miles since 19504 rated F2/EF2+ · 16 federal declarations for Warren County · 1 quake M2+ within 25 mi

Source: NOAA Storm Prediction Center tornado database 1950-2025 (tracks within 5 miles of each ZIP's population-weighted center), OpenFEMA disaster declarations by county since 1956, USGS earthquake catalog M2+ since 1970 within 25 miles… · NOAA SPC tornado data · OpenFEMA · USGS earthquakes · NOAA storm events · IEM warning archive

Full detail

Loading the full detail… Or open it on the map.

Spills

15 to 39

20 spills reported since 2021mostly diesel and fuel oil · 4 reached water

Spills reported since 2021 inside ZIP 45040

  1. Battery / Batteries Dry Cell2024-05-02 · Mason · 1.0 mi
    Reported
    2024-05-02
    What spilled
    Battery / Batteries Dry Cell
    Where
    Mason, Warren County
    Ohio EPA district office
    SWDO
    Ohio EPA case number
    2405EPA0000732

    Ohio EPA spill reports (source) ↗ Street map and directions ↗

  2. Chemical(S) Unk2023-10-10 · Mason · 1.1 mi
    Reported
    2023-10-10
    What spilled
    Chemical(S) Unk
    Where
    Mason, Warren County
    Ohio EPA district office
    SWDO
    Ohio EPA case number
    2310EPA0001744

    Ohio EPA spill reports (source) ↗ Street map and directions ↗

  3. Drum(S)2024-01-04 · Mason · 1.1 mi
    Reported
    2024-01-04
    What spilled
    Drum(S)
    Largest amount reported
    420 gallons
    Where
    Mason, Warren County
    Ohio EPA district office
    SWDO
    Ohio EPA case number
    2401EPA0000018

    Ohio EPA spill reports (source) ↗ Street map and directions ↗

  4. Fuel Diesel / Diesel Fuel (Vehicle On Or Off Road) Reached water2025-11-03 · Mason · 1.3 mi
    Reported
    2025-11-03
    What spilled
    Fuel Diesel / Diesel Fuel (Vehicle On Or Off Road)
    Reached a waterway
    99 - Unnamed
    Where
    Mason, Warren County
    Ohio EPA district office
    SWDO
    Ohio EPA case number
    2511EPA0001796

    Ohio EPA spill reports (source) ↗ Street map and directions ↗

  5. Fuel Diesel / Diesel Fuel (Vehicle On Or Off Road)2025-09-24 · Mason · 1.3 mi
    Reported
    2025-09-24
    What spilled
    Fuel Diesel / Diesel Fuel (Vehicle On Or Off Road)
    Largest amount reported
    60 gallons
    Where
    Mason, Warren County
    Ohio EPA district office
    SWDO
    Ohio EPA case number
    2509EPA0001599

    Ohio EPA spill reports (source) ↗ Street map and directions ↗

  6. Fuel Gasoline ( 25% Ethanol Not E85)2022-09-23 · Mason · 1.5 mi
    Reported
    2022-09-23
    What spilled
    Fuel Gasoline ( 25% Ethanol Not E85)
    Largest amount reported
    10 gallons
    Where
    Mason, Warren County
    Ohio EPA district office
    SWDO
    Ohio EPA case number
    2209EPA0001458

    Ohio EPA spill reports (source) ↗ Street map and directions ↗

  7. Fuel Diesel / Diesel Fuel (Vehicle On Or Off Road)2025-04-02 · Mason · 1.5 mi
    Reported
    2025-04-02
    What spilled
    Fuel Diesel / Diesel Fuel (Vehicle On Or Off Road)
    Where
    Mason, Warren County
    Ohio EPA district office
    SWDO
    Ohio EPA case number
    2504EPA0000473

    Ohio EPA spill reports (source) ↗ Street map and directions ↗

  8. Oil Transformer Non Pcb2024-03-15 · Mason · 1.6 mi
    Reported
    2024-03-15
    What spilled
    Oil Transformer Non Pcb
    Largest amount reported
    40 gallons
    Where
    Mason, Warren County
    Ohio EPA district office
    SWDO
    Ohio EPA case number
    2403EPA0000417

    Ohio EPA spill reports (source) ↗ Street map and directions ↗

  9. Material Green Reached water2023-05-09 · Mason · 1.7 mi
    Reported
    2023-05-09
    What spilled
    Material Green
    Reached a waterway
    99 - Unnamed
    Where
    Mason, Warren County
    Ohio EPA district office
    SWDO
    Ohio EPA case number
    2305EPA0000752

    Ohio EPA spill reports (source) ↗ Street map and directions ↗

  10. Fuel Diesel / Diesel Fuel (Vehicle On Or Off Road)2025-02-19 · Mason · 1.8 mi
    Reported
    2025-02-19
    What spilled
    Fuel Diesel / Diesel Fuel (Vehicle On Or Off Road)
    Where
    Mason, Warren County
    Ohio EPA district office
    SWDO
    Ohio EPA case number
    2502EPA0000228

    Ohio EPA spill reports (source) ↗ Street map and directions ↗

  11. Mercury / Quicksilver (Hg)2024-06-19 · Deerfield Twp · 1.8 mi
    Reported
    2024-06-19
    What spilled
    Mercury / Quicksilver (Hg)
    Where
    Deerfield Twp, Warren County
    Ohio EPA district office
    SWDO
    Ohio EPA case number
    2406EPA0001035

    Ohio EPA spill reports (source) ↗ Street map and directions ↗

  12. Fuel Diesel / Diesel Fuel (Vehicle On Or Off Road)2026-06-11 · Mason · 2.1 mi
    Reported
    2026-06-11
    What spilled
    Fuel Diesel / Diesel Fuel (Vehicle On Or Off Road)
    Largest amount reported
    75 gallons
    Where
    Mason, Warren County
    Ohio EPA district office
    SWDO
    Ohio EPA case number
    2606EPA0001035

    Ohio EPA spill reports (source) ↗ Street map and directions ↗

  13. Fuel Diesel / Diesel Fuel (Vehicle On Or Off Road)2022-02-02 · Mason · 2.2 mi
    Reported
    2022-02-02
    What spilled
    Fuel Diesel / Diesel Fuel (Vehicle On Or Off Road)
    Largest amount reported
    50 gallons
    Where
    Mason, Warren County
    Ohio EPA district office
    SWDO
    Ohio EPA case number
    2202EPA0000107

    Ohio EPA spill reports (source) ↗ Street map and directions ↗

  14. Sheen Rainbow / Hydrocarbon Reached water2024-07-29 · Mason · 2.4 mi
    Reported
    2024-07-29
    What spilled
    Sheen Rainbow / Hydrocarbon
    Reached a waterway
    99 - Unnamed
    Where
    Mason, Warren County
    Ohio EPA district office
    SWDO
    Ohio EPA case number
    2407EPA0001296

    Ohio EPA spill reports (source) ↗ Street map and directions ↗

  15. Antifreeze Vehicle Cooling2021-09-02 · Deerfield Twp · 2.5 mi
    Reported
    2021-09-02
    What spilled
    Antifreeze Vehicle Cooling
    Largest amount reported
    7 gallons
    Where
    Deerfield Twp, Warren County
    Ohio EPA district office
    SWDO
    Ohio EPA case number
    2109EPA0001395

    Ohio EPA spill reports (source) ↗ Street map and directions ↗

  16. Paint Waste(S)2021-07-12 · Mason · 2.6 mi
    Reported
    2021-07-12
    What spilled
    Paint Waste(S)
    Where
    Mason, Warren County
    Ohio EPA district office
    SWDO
    Ohio EPA case number
    2107EPA0001032

    Ohio EPA spill reports (source) ↗ Street map and directions ↗

  17. Material Unknown2024-10-08 · Deerfield Twp · 3.0 mi
    Reported
    2024-10-08
    What spilled
    Material Unknown
    Where
    Deerfield Twp, Warren County
    Ohio EPA district office
    SWDO
    Ohio EPA case number
    2410EPA0001721

    Ohio EPA spill reports (source) ↗ Street map and directions ↗

  18. Sheen Rainbow / Hydrocarbon2025-02-02 · Deerfield Twp · 3.0 mi
    Reported
    2025-02-02
    What spilled
    Sheen Rainbow / Hydrocarbon; Fuel Diesel / Diesel Fuel (Vehicle On Or Off Road)
    Where
    Deerfield Twp, Warren County
    Ohio EPA district office
    SWDO
    Ohio EPA case number
    2502EPA0000137

    Ohio EPA spill reports (source) ↗ Street map and directions ↗

  19. Oil Transformer Non Pcb2021-06-03 · Mason · 3.5 mi
    Reported
    2021-06-03
    What spilled
    Oil Transformer Non Pcb
    Largest amount reported
    30 gallons
    Where
    Mason, Warren County
    Ohio EPA district office
    SWDO
    Ohio EPA case number
    2106EPA0000784

    Ohio EPA spill reports (source) ↗ Street map and directions ↗

  20. Material Unknown Reached water2026-06-18 · Deerfield Twp · 3.8 mi
    Reported
    2026-06-18
    What spilled
    Material Unknown
    Reached a waterway
    99 - Unnamed
    Where
    Deerfield Twp, Warren County
    Ohio EPA district office
    SWDO
    Ohio EPA case number
    2606EPA0001099

    Ohio EPA spill reports (source) ↗ Street map and directions ↗

Source: Ohio EPA emergency response spill reports, 2021 to September 2026, one point per case where Ohio EPA placed it. A report is what the caller or responder recorded; amounts are often blank or estimated. Miles are straight-line from the ZIP's population-weighted center.

Source: Ohio EPA emergency response spill reports (geo.epa.ohio.gov EmergResponse/Spills2_OpenData): cases with a location inside each ZIP, 2021 to date · Ohio EPA spills data · Ohio EPA Office of Emergency Response

Full detail

Loading the full detail… Or open it on the map.

Oil and gas wells

1 to 10 wells

1 well in the ZIP0 producing · 0 shale · 0 orphan · nearest 2.15 mi

Source: ODNR Division of Oil and Gas Resources public well inventory (242,324 well heads, fetched 2026-09-08): wells inside each ZIP by status, horizontal shale wells, injection wells, orphan-program wells · ODNR oil and gas · ODNR GIS services

Full detail

Loading the full detail… Or open it on the map.

Abandoned mines

No mapped underground mine

No mapped minenearest mapped non-coal mine 37.3 mi

Source: ODNR Mines of Ohio: abandoned underground coal and industrial-mineral mines mapped before 1977 (5,116 polygons), overlaid on ZCTAs in Albers equal-area: share of each ZCTA's total area (land plus inland water) over a mapped mine; ODNR… · ODNR mines of Ohio · ODNR Geological Survey

Full detail

Loading the full detail… Or open it on the map.

Soils

Septic: not limited

Russell-Miamian-Urban land complex, 2 to 6 percent slopes, moderately erodedseptic not limited · well drained

Source: USDA NRCS SSURGO via Soil Data Access: the soil map unit under each ZIP's population-weighted center with its dominant component, drainage, hydric and farmland class, flooding, and the Ohio septic and basement interpretation ratings… · USDA Soil Data Access · Web Soil Survey · Open-Meteo elevation

Full detail

Loading the full detail… Or open it on the map.

Parks

5 to 15%

6.6% public land · 1,199 acresGolf Center · Stonelick State Park 15.2 mi

Source: USGS Protected Areas Database 4.1 (Ohio state package, flattened combined layer, open-access fee, designation and easement polygons plus the six ODNR state parks PAD-US codes closed by default: Buckeye Lake, Forked Run, Hueston Woods, Lake… · USGS PAD-US · ODNR GIS services

Full detail

Loading the full detail… Or open it on the map.

Wetlands

1 to 3%

1.5% wetland · 273 acrespond 242 · forested/shrub wetland 21 · emergent wetland 11

Source: USFWS National Wetlands Inventory, Ohio geodatabase (imagery mostly 2004 to 2007, Lake Erie basin 2021), freshwater wetlands and ponds clipped to each ZIP (lakes and rivers excluded); Ohio EPA potential high-quality vernal pools… · USFWS wetlands inventory · Ohio EPA GIS services

Full detail

Loading the full detail… Or open it on the map.

Land cover

75% or more

77% developed · 14% tree canopypasture 11% · forest 8% · cropland 3%

Source: National Land Cover Database, 2021 edition (USGS and the MRLC consortium; MRLC has since published Annual NLCD and annual tree canopy through 2025, not yet pulled here): land cover, percent impervious surface and tree canopy at 30 m… · NLCD · USDA Cropland Data Layer · ODNR pre-settlement vegetation

Full detail

Loading the full detail… Or open it on the map.

People and health

Who lives here and how well: education, jobs, health and life expectancy, and how far the nearest hospital, police station or grocery store sits.

People

55% or more

63% bachelor's or higher68.2% white · 3.6% Black · 4% Hispanic · 19.7% Asian · 20.8% foreign-born

Source: Census ACS 2020-2024 5-year by ZCTA: educational attainment (B15003), race and Hispanic origin (B03002), nativity (B05002), veterans (B21001); IRS Statistics of Income county migration flows 2022 to 2023 for the county; Census Bureau… · Census ACS · Census population estimates · IRS migration data · USDA ERS county codes · USDA ERS commuting area codes · 2020 Census redistricting data · Census SAIPE · IRS exempt organizations

Full detail

Loading the full detail… Or open it on the map.

Jobs

1 to 2

39,955 jobs · 27,365 employed residentsCompany management leads

Source: Census LEHD LODES 8, 2023, all jobs: workplace and residence counts by census block summed into ZCTAs (workplace-only blocks by block-group or tract majority), origin-destination flows for where residents work; Census ZIP Code Business… · Census LEHD · BLS local unemployment · BLS QCEW · BEA county GDP · USAspending · OSHA enforcement data · Census ZIP Business Patterns · Census ACS · USDA ERS county typology · CDFI Fund Opportunity Zones

Full detail

Loading the full detail… Or open it on the map.

Economic history

Ohio River

Ohio River intake at the plant's riverfront on Kellogg Ave in the California neighborhood, east CincinnatiRichard Miller Treatment Plant · Cincinnati Public Water System · +1 more

Source: Historical economic data: Census Bureau historical county population via the NBER mirror (1900) and Census Bureau population estimates (current and peak), Census County Business Patterns, USDA Census of Agriculture, FHFA House Price Index… · FRED (Federal Reserve Bank of St. Louis) · Census County Business Patterns · USDA Census of Agriculture · FHFA House Price Index · BEA GDP by county · Census American Community Survey · IPUMS NHGIS historical census · Zillow Home Value Index

Full detail

Loading the full detail… Or open it on the map.

Upward mobility

45th to 50th

Percentile rank 48.2income rank at 35 for children of low-income parents · 0.45% incarcerated in 2010

Source: Opportunity Atlas (Chetty, Friedman, Hendren, Jones and Porter, Census Bureau): tract outcomes for children born 1978 to 1983, population-weighted to ZIPs through 2020 census blocks · Opportunity Atlas · Opportunity Insights data

Full detail

Loading the full detail… Or open it on the map.

Social vulnerability

20th to 40th percentile

24th percentile of Ohio tractssocioeconomic 10 · household 48 · minority status 70 · housing and transport 33

Source: CDC/ATSDR Social Vulnerability Index 2022 by census tract (percentile ranks among Ohio tracts), population-weighted to ZIPs through 2020 census blocks · CDC/ATSDR SVI

Full detail

Loading the full detail… Or open it on the map.

Health

12 to 16%

12.6% in fair or poor healthobesity 29.9% · diabetes 10.5% · smoking 9.8% · depression 20.6%

Source: CDC PLACES 2025 release, ZCTA model-based estimates of adult health (BRFSS 2023, ACS): fair or poor health, obesity, diabetes, smoking, depression, lack of health insurance among adults 18-64 and more; County Health Rankings 2025… · CDC PLACES · County Health Rankings · CDC overdose data · NCI cancer profiles · HRSA data

Full detail

Loading the full detail… Or open it on the map.

Life expectancy

82 years or more

83.4 years life expectancy9 tracts, from 77.4 to 87.4

Source: CDC/NCHS U.S. Small-area Life Expectancy Estimates Project (USALEEP, deaths 2010-2015, 2010 census tracts) weighted into ZIPs by 2020 block population · CDC USALEEP

Full detail

Loading the full detail… Or open it on the map.

Hospitals

Under 3 miles

West Chester Medical Center · 2.8 miWest Chester · 216 beds · Level III trauma · 3 within 10 miles

Hospitals within 5 miles

  1. Lindner Center of HopePsychiatric hospital · Mason · 1.7 mi
    What it is
    Psychiatric hospital
    Address
    4075 Old Western Row Road, Mason, OH 45040
    County
    Warren County
    Beds
    34
    Ownership
    Non-profit
    Medicare overall rating
    not rated
    Emergency department (Medicare)
    No
    Phone
    (513) 536-4673
    Medicare ID
    364044

    Medicare Care Compare ↗ Where HIFLD got this record ↗ HIFLD hospitals (source) ↗ Street map and directions ↗

  2. Cincinnati Children's Hospital Medical Center at T Trauma level IPsychiatric hospital · Mason · 1.7 mi
    What it is
    Psychiatric hospital
    Address
    4075 Old Western Row Road, Mason, OH 45040
    County
    Warren County
    Beds
    16
    Trauma center
    Level I Pediatric
    Ownership
    Non-profit
    Phone
    (513) 803-0505

    Where HIFLD got this record ↗ HIFLD hospitals (source) ↗ Street map and directions ↗

  3. West Chester Medical Center Trauma level IIIGeneral hospital · West Chester · 2.8 mi
    What it is
    General hospital
    Address
    7700 University Drive, West Chester, OH 45069
    County
    Butler County
    Beds
    216
    Trauma center
    Level IIi
    Helipad
    Yes
    Ownership
    Non-profit
    Medicare overall rating
    3 of 5 stars
    Emergency department (Medicare)
    Yes
    Medicare reports it as
    West Chester Hospital
    Phone
    (513) 298-3000
    Medicare ID
    360354

    Medicare Care Compare ↗ Where HIFLD got this record ↗ HIFLD hospitals (source) ↗ Street map and directions ↗

  4. The Christ Hospital Medical Center Liberty TownshipSpecialty hospital · Liberty Township · 3.0 mi
    What it is
    Specialty hospital
    Address
    6939 Cox Road, Liberty Township, OH 45069
    County
    Butler County
    Beds
    36
    Helipad
    Yes
    Ownership
    Non-profit
    Phone
    (513) 585-1139

    Where HIFLD got this record ↗ HIFLD hospitals (source) ↗ Street map and directions ↗

  5. Mercy Health - Kings Mill HospitalGeneral hospital · Mason · 3.2 mi
    What it is
    General hospital
    Address
    5440 Kings Island Drive, Mason, OH 45040
    County
    Warren County
    Beds
    60
    Ownership
    Non-profit
    Medicare overall rating
    not rated
    Emergency department (Medicare)
    Yes
    Medicare reports it as
    Mercy Health Kings Mills Hospital Llc
    Phone
    (513) 637-9999
    Medicare ID
    360374

    Medicare Care Compare ↗ Where HIFLD got this record ↗ HIFLD hospitals (source) ↗ Street map and directions ↗

  6. Children's Hospital Medical Center - Liberty CampusChildren's hospital · Liberty Township · 3.3 mi
    What it is
    Children's hospital
    Address
    7777 Yankee Road, Liberty Township, OH 45044
    County
    Butler County
    Beds
    54
    Helipad
    Yes
    Ownership
    Non-profit
    Phone
    (513) 803-0505

    Where HIFLD got this record ↗ HIFLD hospitals (source) ↗ Street map and directions ↗

  7. Liberty Rehabilitation HospitalCritical access hospital · Liberty Township · 3.4 mi
    What it is
    Critical access hospital
    Address
    7810 Bethany Road, Liberty Township, OH 45044
    County
    Butler County
    Beds
    36
    Ownership
    Proprietary
    Phone
    (513) 805-0300

    Where HIFLD got this record ↗ HIFLD hospitals (source) ↗ Street map and directions ↗

Source: HIFLD hospitals inventory via FEMA (closed hospitals it still lists left out, hospitals opened since added), with Medicare Care Compare ratings matched by name and address. Miles are straight-line from the ZIP's population-weighted center, as the card above measures them.

The nearest health centers

  1. HealthSource of Ohio, Inc. PCR LabHealth center · Loveland · 8.9 mi
    Run by
    a federally qualified health center
    Setting
    Clinic
    City
    Loveland
    Coordinates
    39.22272, -84.28490

    Find a Health Center (HRSA) ↗ HRSA data (source) ↗ Street map and directions ↗

  2. HealthSource of Ohio, Inc.Health center · Loveland · 8.9 mi
    Run by
    a federally qualified health center
    Setting
    Clinic
    City
    Loveland
    Coordinates
    39.22195, -84.28451

    Find a Health Center (HRSA) ↗ HRSA data (source) ↗ Street map and directions ↗

Source: HRSA health center service delivery sites, active, September 2026 (school-based sites left out). Health centers see patients whether or not they have insurance, with fees on a sliding scale. Miles are straight-line from the ZIP's population-weighted center, as the card above measures them.

Dialysis centers within 5 miles

  1. Davita West Chester DialysisDialysis · West Chester · 2.3 mi
    Address
    7760 W. Voice of American Park Drive, West Chester, OH 45069
    Dialysis stations
    17
    Medicare star rating
    3 of 5 stars
    Services
    in-center hemodialysis
    Ownership
    for profit
    Chain
    DaVita
    Medicare certified since
    2015-03-19
    Phone
    (513) 755-1510
    Medicare ID
    362824

    Medicare Care Compare ↗ CMS dialysis facility list (source) ↗ Street map and directions ↗

  2. Fmc - Kings MillsDialysis · Kings Mills · 3.4 mi
    Address
    1992 King Avenue, Kings Mills, OH 45034
    Dialysis stations
    12
    Medicare star rating
    1 of 5 stars
    Services
    in-center hemodialysis
    Ownership
    for profit
    Chain
    Fresenius Medical Care
    Medicare certified since
    2008-09-23
    Phone
    (513) 204-5555
    Medicare ID
    362725

    Medicare Care Compare ↗ CMS dialysis facility list (source) ↗ Street map and directions ↗

  3. Davita Loveland DialysisDialysis · Loveland · 3.6 mi
    Address
    8944 Columbia Rd Suite 6, Loveland, OH 45140
    Dialysis stations
    13
    Medicare star rating
    3 of 5 stars
    Services
    in-center hemodialysis
    Ownership
    for profit
    Chain
    DaVita
    Medicare certified since
    2018-05-31
    Phone
    (513) 583-5326
    Medicare ID
    362872

    Medicare Care Compare ↗ CMS dialysis facility list (source) ↗ Street map and directions ↗

Source: CMS dialysis facility list, September 2026, geocoded with the Census Bureau batch geocoder (an address it could not place sits at its ZIP center). Miles are straight-line from the ZIP's population-weighted center, as the card above measures them.

Source: Nearest hospital: miles from each ZIP's population-weighted center to the nearest open general or critical-access hospital in Ohio, or, within 40 miles of the state line in Indiana, Kentucky, West Virginia, Pennsylvania and Michigan, the… · CMS Care Compare data · HIFLD · HRSA data · CMS NPI files

Full detail

Loading the full detail… Or open it on the map.

Nursing homes

Under 1 mile

MCV HEALTH CARE FACILITIES, INC · 0.9 mi5 of 5 stars · 73 beds · 8 within 5 miles

Nursing homes within 3 miles

  1. Mcv Health Care Facilities, Inc5 of 5 stars · Mason · 0.9 mi
    Address
    411 Western Row Road, Mason, OH 45040
    Certified beds
    73
    Residents on an average day
    61
    Medicare overall rating
    5 of 5 stars
    Health inspections
    5 of 5 stars
    Staffing
    5 of 5 stars
    Quality measures
    5 of 5 stars
    Penalties since 2023
    none
    Ownership
    Non profit - Church related
    Continuing care retirement community
    Yes
    Takes
    Medicare and Medicaid
    Phone
    (513) 398-1486
    Medicare ID
    365894

    Medicare Care Compare ↗ CMS nursing home data (source) ↗ Street map and directions ↗

  2. Majestic Care of Cedar Village.2 of 5 stars · Mason · 1.4 mi
    Address
    5467 Cedar Village Drive, Mason, OH 45040
    Certified beds
    162
    Residents on an average day
    153
    Medicare overall rating
    2 of 5 stars
    Health inspections
    1 of 5 stars
    Staffing
    2 of 5 stars
    Quality measures
    5 of 5 stars
    Penalties since 2023
    1 fine totalling $62,205, 1 payment denial (latest 2024-04-03)
    Ownership
    For profit - Limited Liability company
    Chain
    MAJESTIC CARE
    Takes
    Medicare and Medicaid
    Phone
    (513) 754-3100
    Medicare ID
    366120

    Medicare Care Compare ↗ CMS nursing home data (source) ↗ Street map and directions ↗

  3. Mason Health Care Center3 of 5 stars · Mason · 1.7 mi
    Address
    5640 Cox-Smith Road, Mason, OH 45040
    Certified beds
    53
    Residents on an average day
    39
    Medicare overall rating
    3 of 5 stars
    Health inspections
    3 of 5 stars
    Staffing
    2 of 5 stars
    Quality measures
    3 of 5 stars
    Penalties since 2023
    none
    Ownership
    For profit - Partnership
    Takes
    Medicare and Medicaid
    Phone
    (513) 398-2881
    Medicare ID
    366216

    Medicare Care Compare ↗ CMS nursing home data (source) ↗ Street map and directions ↗

  4. Chesterwood Atc5 of 5 stars · West Chester · 2.2 mi
    Address
    7924 Chesterwood Blvd, West Chester, OH 45069
    Certified beds
    125
    Residents on an average day
    120
    Medicare overall rating
    5 of 5 stars
    Health inspections
    4 of 5 stars
    Staffing
    2 of 5 stars
    Quality measures
    5 of 5 stars
    Penalties since 2023
    none
    Ownership
    For profit - Corporation
    Chain
    CARESPRING
    Takes
    Medicare and Medicaid
    Phone
    (513) 777-1400
    Medicare ID
    366080

    Medicare Care Compare ↗ CMS nursing home data (source) ↗ Street map and directions ↗

  5. Heritagespring Healthcare Center of West Chester3 of 5 stars · West Chester · 2.3 mi
    Address
    7235 Heritagespring Drive, West Chester, OH 45069
    Certified beds
    144
    Residents on an average day
    125
    Medicare overall rating
    3 of 5 stars
    Health inspections
    3 of 5 stars
    Staffing
    2 of 5 stars
    Quality measures
    4 of 5 stars
    Penalties since 2023
    2 fines totalling $40,745 (latest 2025-11-19)
    Ownership
    For profit - Corporation
    Chain
    CARESPRING
    Takes
    Medicare and Medicaid
    Phone
    (513) 759-5777
    Medicare ID
    366301

    Medicare Care Compare ↗ CMS nursing home data (source) ↗ Street map and directions ↗

Source: CMS Care Compare nursing home provider and penalties files; Medicare star ratings run 1 to 5. Miles are straight-line from the ZIP's population-weighted center, as the card above measures them.

Source: CMS Care Compare nursing home provider file (922 Ohio homes), addresses geocoded with the Census Bureau batch geocoder (67 unmatched placed at their ZIP center); CMS penalties file (fines and payment denials since 2023, matched by name and… · CMS Care Compare data

Full detail

Loading the full detail… Or open it on the map.

Crime

Under 1 violent offense per 1,000

0.4 violent offenses per 1,000Mason Police · 5.3 property per 1,000 · 12 months · 8% of property cleared

Source: FBI Crime Data Explorer NIBRS incident files for Ohio, 2024 (2023 file for the trend), as downloaded in September 2026; the FBI keeps accepting agency revisions after release, so an agency's live Explorer totals for the same year can… · FBI Crime Data Explorer · USGS structures service

Full detail

Loading the full detail… Or open it on the map.

Police

Under 1 mile

Mason Police Department · 0.6 mi1 station within 3 miles · post office 0.6 mi

Police stations within 3 miles, and the nearest beyond

  1. Mason Police DepartmentMason · 0.6 mi
    Address
    6000 Mason - Montgomery Road, Mason, OH 45040
    Coordinates
    39.35376, -84.30782

    USGS National Map structures (source) ↗ Street map and directions ↗

  2. Loveland Police DepartmentLoveland · 5.7 mi
    Address
    126 South Lebanon Road, Loveland, OH 45140
    Coordinates
    39.27005, -84.28471

    USGS National Map structures (source) ↗ Street map and directions ↗

Source: USGS National Map structures, police stations, corrected and completed by hand (September 2026). The department that answers a call is set by jurisdiction, not by distance. Miles are straight-line from the ZIP's population-weighted center, as the card above measures them.

Source: USGS National Map structures: police stations (772 Ohio points: the inventory's 731 less 4 closed or duplicate records, with 4 wrong names corrected, plus 45 departments and sheriff's offices it lacks, placed from OpenStreetMap or the… · USGS structures service · OpenStreetMap · Census Bureau geocoder

Full detail

Loading the full detail… Or open it on the map.

Fire and EMS

1 to 2 miles

City of Mason Fire Station 52 · 1.3 mi5 stations within 3 miles, 26 within 8

Fire and EMS stations within 3 miles

  1. City of Mason Fire Station 52Mason · 1.3 mi
    Address
    5500 Cedar Village Drive, Mason, OH 45040
    Coordinates
    39.32953, -84.31907

    USGS National Map structures (source) ↗ Street map and directions ↗

  2. City of Mason Fire Station 51Mason · 1.8 mi
    Address
    4420 Mason - Montgomery Road, Mason, OH 45040
    Coordinates
    39.37372, -84.30719

    USGS National Map structures (source) ↗ Street map and directions ↗

  3. Deerfield Township Fire Rescue Station 56Mason · 2.3 mi
    Address
    8395 Snider Road, Mason, OH 45040
    Coordinates
    39.31690, -84.33218

    USGS National Map structures (source) ↗ Street map and directions ↗

  4. Kings Island Fire Department - Warren County Station 55Mason · 2.5 mi
    Address
    6300 Kings Island Drive, Mason, OH 45040
    Coordinates
    39.34133, -84.27222

    USGS National Map structures (source) ↗ Street map and directions ↗

  5. West Chester Fire Station 75West Chester · 3.0 mi
    Address
    7588 Tylers Place Boulevard, West Chester, OH 45069
    Coordinates
    39.35818, -84.37173

    USGS National Map structures (source) ↗ Street map and directions ↗

Source: USGS National Map structures (most Ohio records last updated 2019 to 2022), checked against the Columbus and Cleveland station lists. The department that answers a call is set by jurisdiction and mutual aid, not by distance. Miles are straight-line from the ZIP's population-weighted center, as the card above measures them.

Source: USGS National Map structures inventory (fire and EMS stations; most Ohio records last updated 2019 to 2022): 1,772 Ohio stations after removing duplicate records and checking Columbus- and Cleveland-area stations against the cities'… · USGS structures service · Columbus fire stations · Cleveland fire stations

Full detail

Loading the full detail… Or open it on the map.

Libraries

Under 1 mile

Mason Public Library · 0.8 mi1 within 3 miles, 7 within 8

Public libraries within 3 miles, and the nearest beyond

  1. Mason Public LibraryCentral library · Mason · 0.8 mi
    Address
    200 Reading Rd., Mason, OH 45040
    What it is
    Central library
    Library system
    Mason Public Library
    Open
    672 hours a year, 52 weeks
    Building
    29,974 sq ft
    System's visits, FY2024
    52,000
    System's loans, FY2024
    1,093,140
    People the system serves
    75,139
    Phone
    (513) 398-2711

    IMLS Public Libraries Survey (source) ↗ Street map and directions ↗

  2. Midpointe Library System - LibertyBranch · Liberty Township · 3.3 mi
    Address
    7100 Foundry Row, Liberty Township, OH 45069
    What it is
    Branch
    Library system
    Midpointe Library System
    Open
    2,956 hours a year, 52 weeks
    Building
    3,671 sq ft
    System's visits, FY2024
    663,208
    System's loans, FY2024
    2,107,928
    People the system serves
    202,986
    Phone
    (513) 705-8519

    IMLS Public Libraries Survey (source) ↗ Street map and directions ↗

Source: IMLS Public Libraries Survey FY2024 (outlets and their systems). Any Ohio resident can get a free card at any Ohio public library. Miles are straight-line from the ZIP's population-weighted center, as the card above measures them.

Museums, historical societies, gardens and zoos inside ZIP 45040

  1. Alverta Green MuseumMuseum · Mason · 0.9 mi
    What it is
    Museum
    City
    Mason
    Coordinates
    39.36131, -84.31055

    Search Wikipedia ↗ IMLS Museum Data Files (source) ↗ Street map and directions ↗

    The museum list is IMLS's 2018 file; a museum may have closed or moved since.

  2. Mason Historical SocietyHistorical society · Mason · 0.9 mi
    What it is
    Historical society
    City
    Mason
    Coordinates
    39.36131, -84.31055

    Search Wikipedia ↗ IMLS Museum Data Files (source) ↗ Street map and directions ↗

    The museum list is IMLS's 2018 file; a museum may have closed or moved since.

Source: IMLS Museum Data Files, 2018. Miles are straight-line from the ZIP's population-weighted center.

Source: IMLS Public Libraries Survey FY2024 outlet and system files (720 open Ohio central libraries and branches of 251 systems, plus 62 bookmobiles); straight-line miles from each ZIP's population-weighted center to the nearest Ohio library… · IMLS Public Libraries Survey · IMLS Museum Data Files

Full detail

Loading the full detail… Or open it on the map.

Groceries

No residents in a flagged tract

No residents in a low-income, low-access tract52% over 1 mile from a supermarket · 3% of households on SNAP (ACS)

Source: USDA Food Access Research Atlas 2019 Large Retailer Access Map (2010 tracts, ERS's name for the file since July 2026) weighted by 2020 block population: distance to the nearest supermarket and low-income low-access flags; Census ACS… · USDA ERS Large Retailer Access Map · USDA SNAP retailers · Census ACS

Full detail

Loading the full detail… Or open it on the map.

History, schools and government

How the place began, who governs it now, and the schools that serve it, from the district boundary to its state report card.

Local history

1800 to 1814

Mason · settled 1803first settled, platted or incorporated (earliest year recorded)

Source: Local history researched from Wikipedia, the 1880 county histories on archive.org, Ohio History Connection, National Register listings, Ohio historical markers, local historical societies and Wikimedia Commons, one file per municipality… · Ohio History Connection · Internet Archive (county histories) · Wikimedia Commons · Remarkable Ohio (historical markers)

Full detail

Loading the full detail… Or open it on the map.

Historic places

No listed place in the ZIP

0 listed historic placesnearest: King, Ahimaaz, House, 3.8 mi

Source: National Park Service, National Register of Historic Places point file (3,286 points for 3,232 of Ohio's roughly 4,200 listings; listings without a point are not counted, and a listing with several points is counted once); listings inside… · National Register data · USGS GNIS

Full detail

Loading the full detail… Or open it on the map.

Schools

193 city school districts

Mason CityCity school district

Public schools inside ZIP 45040

  1. Mason Intermediate Elementary School5 of 5 stars · Mason · 0.3 mi
    Address
    6307 S Mason Montgomery Rd, Mason, OH 45040
    School district
    Mason City School District
    Kind (NCES)
    Regular School
    Students, 2023-24
    3,034
    Teachers (full-time equivalent)
    150.5
    Report card, 2025-26
    5 of 5 stars
    Performance index
    93.5%
    Ohio building IRN
    126193
    NCES school ID
    390504501468

    NCES school record ↗ Ohio School Report Card ↗ Street map and directions ↗

  2. Mason Middle School5 of 5 stars · Mason · 0.5 mi
    Address
    6370 S Mason Montgomery Rd, Mason, OH 45040
    School district
    Mason City School District
    Kind (NCES)
    Regular School
    Students, 2023-24
    1,665
    Teachers (full-time equivalent)
    82.5
    Report card, 2025-26
    5 of 5 stars
    Performance index
    92.6%
    Ohio building IRN
    005363
    NCES school ID
    390504503952

    NCES school record ↗ Ohio School Report Card ↗ Street map and directions ↗

  3. William Mason High School5 of 5 stars · Mason · 0.6 mi
    Address
    6100 S Mason Montgomery Rd, Mason, OH 45040
    School district
    Mason City School District
    Kind (NCES)
    Regular School
    Students, 2023-24
    3,488
    Teachers (full-time equivalent)
    141.5
    Report card, 2025-26
    5 of 5 stars
    Performance index
    94.4%
    Four-year graduation rate
    98.2%
    Ohio building IRN
    041376
    NCES school ID
    390504503954

    NCES school record ↗ Ohio School Report Card ↗ Street map and directions ↗

  4. Mason Early Childhood Center Elementary School5 of 5 stars · Mason · 1.6 mi
    Address
    4631 Hickory Woods Dr, Mason, OH 45040
    School district
    Mason City School District
    Kind (NCES)
    Regular School
    Students, 2023-24
    2,102
    Teachers (full-time equivalent)
    94.2
    Report card, 2025-26
    5 of 5 stars
    Ohio building IRN
    121871
    NCES school ID
    390504501106

    NCES school record ↗ Ohio School Report Card ↗ Street map and directions ↗

  5. Columbia Intermediate School4.5 of 5 stars · Kings Mills · 2.8 mi
    Address
    8263 Columbia Rd, Kings Mills, OH 45034
    School district
    Kings Local School District
    Kind (NCES)
    Regular School
    Students, 2023-24
    768
    Teachers (full-time equivalent)
    36.33
    Report card, 2025-26
    4.5 of 5 stars
    Performance index
    84.6%
    Ohio building IRN
    124875
    NCES school ID
    390504300921

    NCES school record ↗ Ohio School Report Card ↗ Street map and directions ↗

Source: NCES EDGE public school locations 2024-25 and Common Core of Data 2023-24 (type, students, teachers); Ohio School Report Cards 2025-26 (Department of Education and Workforce), matched by name within the district. Miles are straight-line from the ZIP's population-weighted center.

Private schools inside ZIP 45040

  1. The Goddard School - Mason IPrivate, nonsectarian · Mason · 0.4 mi
    Address
    754 Reading Rd, Mason, OH 45040
    Kind
    nonsectarian
    Students, 2023-24
    10
    Teachers (full-time equivalent)
    1
    Students per teacher
    10
    Phone
    (513) 398-2777
    NCES private school ID
    A1503027

    NCES private school record ↗ Street map and directions ↗

  2. St Susanna Elementary SchoolPrivate, Catholic · Mason · 0.5 mi
    Address
    500 Reading Rd, Mason, OH 45040
    Kind
    Catholic
    Students, 2023-24
    628
    Teachers (full-time equivalent)
    34.6
    Students per teacher
    18.1503
    Phone
    (513) 398-3821
    NCES private school ID
    01056074

    NCES private school record ↗ Street map and directions ↗

  3. Primrose School of MasonPrivate, nonsectarian · Mason · 0.8 mi
    Address
    5888 Snider Rd, Mason, OH 45040
    Kind
    nonsectarian
    Students, 2023-24
    17
    Teachers (full-time equivalent)
    1
    Students per teacher
    17
    Phone
    (513) 336-6756
    NCES private school ID
    A1903472

    NCES private school record ↗ Street map and directions ↗

  4. Chai Tots Montessori SchoolPrivate, religious, independent · Mason · 1.4 mi
    Address
    7587 Central Parke Blvd, Mason, OH 45040
    Kind
    religious, independent
    Students, 2023-24
    4
    Teachers (full-time equivalent)
    2
    Students per teacher
    2
    Phone
    (513) 234-0777
    NCES private school ID
    A1302269

    NCES private school record ↗ Street map and directions ↗

  5. Royalmont AcademyPrivate, Catholic · Mason · 1.4 mi
    Address
    200 Northcrest Dr, Mason, OH 45040
    Kind
    Catholic
    Students, 2023-24
    147
    Teachers (full-time equivalent)
    21.6
    Students per teacher
    6.80556
    Phone
    (513) 754-0555
    NCES private school ID
    A0302492

    NCES private school record ↗ Street map and directions ↗

  6. Montessori Academy of CincinnatiPrivate, nonsectarian, special program · Mason · 2.4 mi
    Address
    8293 Duke Blvd, Mason, OH 45040
    Kind
    nonsectarian, special program
    Students, 2023-24
    158
    Teachers (full-time equivalent)
    18.8
    Students per teacher
    8.40426
    Phone
    (513) 398-7773
    NCES private school ID
    A1302547

    NCES private school record ↗ Street map and directions ↗

  7. Montessori Academy of CincinnatiPrivate, nonsectarian, special program · Mason · 2.4 mi
    Address
    8293 Duke Blvd, Mason, OH 45040
    Kind
    nonsectarian, special program
    Students, 2023-24
    158
    Teachers (full-time equivalent)
    19.3
    Students per teacher
    8.18653
    Phone
    (513) 398-7773
    NCES private school ID
    A9503213

    NCES private school record ↗ Street map and directions ↗

  8. King of Kings Preschool and KindergartenPrivate, religious, denomination-affiliated · Mason · 2.5 mi
    Address
    3621 Socialville Foster Rd, Mason, OH 45040
    Kind
    religious, denomination-affiliated
    Students, 2023-24
    11
    Teachers (full-time equivalent)
    1.6
    Students per teacher
    6.875
    Phone
    (513) 398-6089
    NCES private school ID
    A0108647

    NCES private school record ↗ Street map and directions ↗

  9. Liberty Bible AcademyPrivate, religious, independent · Mason · 2.8 mi
    Address
    4900 Old Irwin Simpson Rd, Mason, OH 45040
    Kind
    religious, independent
    Students, 2023-24
    310
    Teachers (full-time equivalent)
    22.4
    Students per teacher
    13.8393
    Phone
    (513) 754-1234
    NCES private school ID
    A9300724

    NCES private school record ↗ Street map and directions ↗

Source: NCES Private School Survey 2023-24. Miles are straight-line from the ZIP's population-weighted center.

Source: Ohio school district boundaries (U.S. Census Bureau TIGER/Line school districts, as of January 1, 2026) by resident share; NCES EDGE 2024-25 school buildings; NCES Private School Survey 2023-24 public-use file (schools inside the ZIP by… · ODOT GIS · NCES EDGE · NCES Common Core of Data · NCES private schools · Census SAIPE · Census school finances (F-33)

Full detail

Loading the full detail… Or open it on the map.

School ratings

4.5 and 5 stars

5 stars overallMason City · performance index 94.6% of the year's maximum · 98.2% graduate in four years

Source: Ohio School Report Cards 2024-2025 (Department of Education and Workforce): district overall and component star ratings, performance index, graduation rates, spending per pupil and teacher measures, for the district holding the largest… · Ohio school report cards

Full detail

Loading the full detail… Or open it on the map.

Colleges

Under 3 miles

Aveda Fredric's Institute-Cincinnati · 2.4 miWest Chester · 13 campuses within 10 miles

Colleges within 5 miles, and the nearest beyond

  1. Aveda Fredric's Institute-CincinnatiFor-profit career school · West Chester · 2.4 mi
    What it is
    For-profit career school
    City
    West Chester
    Students, 2023-24 (12-month count)
    709
    IPEDS unit ID
    451468

    College Navigator (NCES) ↗ IPEDS data (source) ↗ Street map and directions ↗

  2. Galen College of Nursing-CincinnatiFor-profit college · Cincinnati · 5.2 mi
    What it is
    For-profit college
    City
    Cincinnati
    Students, 2023-24 (12-month count)
    890
    Tuition and fees, in state
    $16,400
    Graduation rate
    55% (all programs, within 150% of normal time) (a class of 42)
    IPEDS unit ID
    452948

    College Navigator (NCES) ↗ IPEDS data (source) ↗ Street map and directions ↗

  3. Arizona College of Nursing-CincinnatiFor-profit college · Cincinnati · 5.3 mi
    What it is
    For-profit college
    City
    Cincinnati
    Students, 2023-24 (12-month count)
    92
    Tuition and fees, in state
    $23,760
    IPEDS unit ID
    499398

    College Navigator (NCES) ↗ IPEDS data (source) ↗ Street map and directions ↗

Source: NCES IPEDS 2024 directory, 2023-24 enrollment and tuition, graduation rates for the 2017 (four-year) and 2020 (two-year) entering classes. Miles are straight-line from the ZIP's population-weighted center, as the card above measures them.

Source: NCES IPEDS: 2024 institutional directory (269 active Ohio institutions with coordinates, less the administrative units and the colleges that have closed since; plus 145 in Indiana, Kentucky, West Virginia, Pennsylvania and Michigan within… · NCES IPEDS

Full detail

Loading the full detail… Or open it on the map.

Local government

255 cities

Mason (city)59% of residents, then Deerfield Township, Warren County

Source: ODOT municipal corporation and township boundaries by resident share of 2020 census blocks; Ohio EPA grants awarded in 2025 (OEPA_Achievements, MapServer layer 8); Auditor of State unauditable entities list · ODOT GIS · Auditor of State · Ohio EPA grants (OEPA_Achievements)

Full detail

Loading the full detail… Or open it on the map.

Representatives

OH-1 · Greg Landsman (D)Senate 7 Steve Wilson · House 56 Adam Mathews

Source: ODOT TIMS Boundaries US_House_District, Ohio_Senate_District and Ohio_House_District (fetched 2026-09-08) by resident share of 2020 census blocks; members from the U.S. House, Ohio Senate and Ohio House directories, September 2026 · U.S. House · Ohio Senate · Ohio House · ODOT GIS

Full detail

Loading the full detail… Or open it on the map.

Deep dives about 45040 (Mason)

Long reads built from maps, newspapers and public records. All deep dives

Rain and snow

How much has actually fallen on 45040 (Mason), day by day, from 1893 to now. Daily totals, not averages.

rain, last 30 days
1.29 in
2026-09-30 to 2026-10-29
rain so far in 2026
46.6 in
7.7 in above normal for the date
snow so far in 2026
17.1 in
a normal year brings 17.1 in
a normal year
45.8 in
average of 30 years, 1991-2020
The last twelve months
MonthRain (in)Snow (in)Days counted
October 2026 1.29 — 29
September 2026 8.36 — 30
August 2026 6.90 — 31
July 2026 3.80 — 31
June 2026 4.85 — 30
May 2026 7.26 — 31
April 2026 3.94 — 30
March 2026 7.26 0.2 31
February 2026 1.20 4.6 28
January 2026 1.71 12.3 31
December 2025 2.57 11.0 31
November 2025 4.01 0.5 30
On the record, 1893–2026
Wettest year1926 — 64.3 in
Driest year1934 — 21.6 in
Snowiest year1977 — 52.8 in
Wettest day on record18 July 2001 — 5.21 in
Heaviest snowfall in a day23 December 2004 — 12.52 in
Deepest snow on the ground20 January 1978 — 14.02 in

81% of these days are measurements from a gauge inside 45040 (Mason); the rest are estimated from the nearest gauges around it.

48,189 days of records, 1893-01-01 to 2026-10-29. Source: NOAA NCEI GHCN-Daily, 3,240 gauges in and around Ohio. A day is "gauged" when a gauge standing inside the boundary reported it, and the value is the mean of those gauges. Otherwise it is interpolated by inverse distance from every gauge reporting within 50 miles. Nothing is carried forward, back-filled or smoothed. Against NOAA nClimDiv county monthly precipitation over 136,848 complete county-months (checked 2026-10-31): correlation 0.9515, median absolute difference 0.217 in a month. Built 2026-10-31 from the Cracked Buckeye precipitation archive. Snow is the softer number — snowfall is measured by hand with a ruler, no agency publishes a gridded county snowfall series, and blowing snow defeats every observer.

Environmental permits and filings

What Ohio EPA has on file for 45040 (Mason): permits, inspections, violations, cleanups and the state loans behind sewer and water work. Every line links to the agency's own document.

facilities and sites on file
82
those placed on the map inside 45040 (Mason)
What kind of permits
ProgramFacilities and sites
Hazardous waste24
Wastewater and stormwater discharge24
Air pollution10
Voluntary cleanup6
Sewer and water-line construction5
Public drinking water3
Site assessment3
Contaminated-site cleanup2
State sewer loans2
Wetland and stream fill2
Composting1
The latest filings
DateFacility or siteWhat
WARREN COUNTY PWS Public drinking water compliance letter
EAST MAIN PARKING LOT Wastewater and stormwater discharge permit
WARREN COUNTY PWS Public drinking water compliance letter
KLASMULCH Composting inspection
KINGS ISLAND PWS Public drinking water compliance letter
WARREN COUNTY PWS Public drinking water compliance letter
LONG COVE MEADOWS Wastewater and stormwater discharge permit
WARREN COUNTY PWS Public drinking water compliance letter
L3 HARRIS CINCINNATI ELECTRONICS Hazardous waste notice of violation
WARREN COUNTY PWS Public drinking water compliance letter
WARREN COUNTY PWS Public drinking water compliance letter
WARREN COUNTY PWS Public drinking water plan
WARREN COUNTY PWS Public drinking water plan
LONG COVE MEADOWS Wastewater and stormwater discharge permit
LONG COVE MEADOWS Wastewater and stormwater discharge permit
WARREN COUNTY PWS Public drinking water compliance letter
KINGS ISLAND PWS Public drinking water inspection
WARREN COUNTY PWS Public drinking water plan
KINGS ISLAND PWS Public drinking water compliance letter
PETERMANN LTD Wastewater and stormwater discharge permit
KINGS ISLAND PWS Public drinking water inspection
KINGS ISLAND PWS Public drinking water compliance letter
LONG COVE MEADOWS Wastewater and stormwater discharge permit
WARREN COUNTY PWS Public drinking water monitoring results
MAUSER-USA Air pollution violation resolved

Source: Ohio EPA eDocument portal (edocpub.epa.ohio.gov), indexed 2026-10-14. Facilities are placed on the map from Ohio EPA's own map layers, EPA's Facility Registry, coordinates written in the filings, or a geocoded street address. A permit filed under a private person's name (most are household septic systems) is counted but never named, placed or linked; licenses for individual workers and open-burning notices are left out entirely.

Around here

Places in this ZIP

School districts

ZIP codes next door

45034 Kings Mills 45036 Lebanon 45039 Maineville 45044 Middletown 45140 Loveland 45241 Cincinnati 45249 Cincinnati

The county

Warren County: 12 ZIP codes, 24 cities, villages and townships, 222,825 people. The county in numbers.

On the map

Infrastructure layers for this ZIP have not been compiled yet. Open this ZIP on the map to see what is drawn nearby.

Quick answers

What city is ZIP code 45040?

ZIP code 45040 is the Mason, Ohio post office area in Warren County, home to 57,153 residents. Of its residents, 59% live in the city of Mason and 40% in Deerfield Township.

What county is ZIP code 45040 in?

ZIP code 45040 is in Warren County, Ohio.

Where does the tap water in ZIP code 45040 come from?

Ohio River intake at the plant's riverfront on Kellogg Ave in the California neighborhood, east Cincinnati. Richard Miller Treatment Plant · Cincinnati Public Water System · +1 more.

What school district is ZIP code 45040 in?

ZIP code 45040 is mostly in the Mason City School District; parts are in the Kings Local School District.

Cite and data

Cite this page as:

Cracked Buckeye, "45040 · Mason, Warren County", https://crackedbuckeye.com/zip/45040/, built 2026-10-31, accessed [date].

How to cite · Report a correction · Built 2026-10-31