Water system
Harrison City
EPA ID OH3100812 · Hamilton County · 11,600 people served · owned by a local government
Harrison City treats its own water from Great Miami Buried Valley Aquifer (wells).
The system's record
- Aquifer
- Great Miami Buried Valley Aquifer
- Active wells
- 7
- Serves
- 11,600 people · Hamilton County
- EPA ID
- OH3100812
City of Harrison draws from its own well field (4 wells at Thomas Lane, 2 wells at Harrison-Brookville Rd) into the regional Great Miami Buried Valley Aquifer.
About this area's water
Did you know
- Three of the seven wells that supply this Ohio city sit in another state - at 153 Harrison-Brookville Rd. in West Harrison, Indiana.
- Harrison's emergency backup water supply is also out of state: an interconnection with Tri-Township Water Corporation in Bright, Indiana.
- The city's 2025 PFAS monitoring under the federal UCMR-5 rule came back with zero detections.
- Harrison built its own reverse-osmosis plant rather than buy softer water: since 2022 the tap water leaves the plant at 8 grains per gallon with iron non-detectable, and the city now tells residents that low pressure at…
Source: harrisonohio.govharrisonohio.gov
History5
- 2017Conceptual design begun for a reverse-osmosis membrane softening system to stop hard, iron-bearing water from damaging plant and distribution infrastructure.
- 2018-2019City secured Ohio EPA revolving-loan financing for the design and then the construction of the softening plant.
- 2020Construction of the RO softening improvements started in October, on an 18-month schedule.
- 20221.5 MGD reverse-osmosis membrane softening system placed in service in the summer, cutting finished-water hardness to about 40 mg/L as CaCO3 (8 grains per gallon) with iron non-detectable.
- 2025Harrison completed UCMR-5 (PFAS) monitoring with zero detections and met all regulatory standards for the year; the system holds a current unconditional Ohio EPA license.
Treatment & pressure
How it is treated
Groundwater from seven wells in the Great Miami (buried valley) Aquifer: four in the Harrison well field at 329 Thomas Lane, about a quarter mile north on State Street from State and Harrison Ave., and three more at 153 Harrison-Brookville Rd. in West Harrison, Indiana. Water is disinfected with…
Source: harrisonohio.govharrisonohio.govfishbeck.com
Water pressure
Not published as a psi figure or pressure-zone map. The city's water page addresses pressure only to note that low household pressure is usually a failing home water softener…
Source: harrisonohio.gov
What it costs
$4.29 per 1,000 gallons
Typical household bill about $31 a month for water.
Effective 7/1/2025. Inside-city residential with a 5/8-inch meter: $13.91 monthly customer charge plus $4.29 per unit, where the rate sheet defines a unit as 1,000 gallons.…
Source: harrisonohio.govharrisonohio.gov
Water quality & impurities10
| Contaminant | Level | Limit | Year |
|---|---|---|---|
| Lead (90th percentile) 0 of 30 samples over the action level. | 0.7 ppb | 15 (AL) | 2025 |
| Copper (90th percentile) 0 of 30 samples over the action level. The CCR's table also prints 0.392 ppm in the adjacent 'individual results over… | 0.454 ppm | 1.3 (AL) | 2025 |
| Total chlorine Range 0.4 to 1.10 mg/L. | 1.10 mg/L | 4 (MRDL) | 2025 |
| Total trihalomethanes (TTHM) Range 11.6 to 16.2 ug/L. Speciated as chloroform 7.1, bromodichloromethane 5.2, dibromochloromethane 3.2 and bromoform… | 16.2 ug/L | 80 | 2025 |
| Fluoride Range 0.80 to 1.04 mg/L; natural plus fluoridation additive. | 1.04 mg/L | 4 | 2025 |
| Nitrate Well below the MCL despite a shallow, unconfined aquifer. | 0.53 mg/L | 10 | 2025 |
| Barium Monitored less than annually; most recent result carried forward. | 0.06 mg/L | 2 | 2022 |
| Beryllium Trace, far below the MCL. | 0.06 ug/L | 4 | 2024 |
| Dichlorobenzene Trace industrial organic, essentially at the detection floor. | 0.03 ug/L | 600 | 2024 |
| PFAS (UCMR-5 suite) City completed UCMR-5 sampling with zero detections. | not detected n/a | unregulated… | 2025 |
Source: harrisonohio.gov
EPA compliance record
Lead at the tap: 90th-percentile result 0.7 ppb in 2025 (action level 15 ppb).
EPA record: no health-based violations since 2015.
2 violations of any kind logged since 2020, 2 of them paperwork (monitoring, reporting, public notice or consumer report).
Projects & plans1
Recent and current work
- Reverse osmosis membrane softening plant · 2022 · completed
1.5 MGD RO system with three membrane arrays and space for a fourth, plus chemical feed, a diesel generator and stormwater management work. Designed by…
Source: fishbeck.comharrisonohio.gov
Supply stress
Ohio EPA rates the Harrison well fields as having HIGH susceptibility to contamination: a shallow water table, no confining layer between the ground surface and the aquifer, and known potential contaminant sources sitting inside the city's wellhead protection areas. The CCR is explicit that this describes potential, not actual…
Source: harrisonohio.gov
Sewers
Sanitary
Harrison runs its own wastewater treatment plant (Wastewater Department, 10999 Campbell Rd.), which city utilities pages describe as having an average daily design flow of about 2.3 MGD and being supported by six wastewater pump stations across the community; treated effluent discharges to the Whitewater River. Sewer charges are…
Storm
No stormwater utility fee or storm system data is published. The city's sewer pages only explain the distinction, calling storm sewers 'storm collection systems' that carry rainfall to a creek, river or detention basin. This is a small system that publishes…
Sourcesverified
Compiled from the utility's own reports and public records, then independently re-checked against primary sources.
Main supplier in 1 ZIP code
Serves
Main water supplier in 1 ZIP code
- 45030 · Harrison58% of residents
Also present in 1 more ZIP code
- 45053 · Morgan Township and Okeana21% of residents
Population-weighted resident shares; a ZIP code can have more than one system on record. Recomputed from each ZIP's own system list, not from the map's cached footprint.
Buys from · Sells to
Harrison City does not buy water from another system on record; it treats its own source water.
No other system is on record buying water from Harrison City.
Photograph
On the map
Show this system's territory on the map — 2 ZIP codes in all.
Sources
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
Harrison City's own pages: harrisonohio.gov, harrisonohio.gov
Notable facts: harrisonohio.gov, harrisonohio.gov
History: harrisonohio.gov, fishbeck.com, harrisonohio.gov
Water quality: harrisonohio.gov
Water pressure: harrisonohio.gov
Capital projects: fishbeck.com, harrisonohio.gov
Rates: harrisonohio.gov, harrisonohio.gov
Sewers: harrisonohio.gov, harrisonohio.gov, harrisonohio.gov
Treatment: harrisonohio.gov, harrisonohio.gov, fishbeck.com
Supply stress: harrisonohio.gov