Water system
Indian Hill City
EPA ID OH3101112 · Hamilton County · 15,000 people served · owned by a local government
Indian Hill City treats its own water from Little Miami River valley aquifer (wells near Milford).
The system's record
- Aquifer
- Little Miami River valley aquifer
- Water bodies
- Little Miami River
- Active wells
- 9
- Serves
- 15,000 people · Hamilton County
- EPA ID
- OH3101112
Indian Hill Water Works pumps from 9 wells along the Little Miami River between Milford and Camp Dennison; the aquifer is directly recharged by the river.
About this area's water
Did you know
- Indian Hill's treatment plant sits directly on top of its own wellfield at 7100 Glendale Milford Road, and the nine wells straddle the Hamilton-Clermont county line along the Little Miami River between Milford and Camp…
- The utility reaches far past the village line: Terrace Park, Camp Dennison, roughly half of Madeira, and parts of Montgomery, Milford, Symmes Township and Columbia Township all buy Indian Hill water, each paying a 25%…
- The tower Indian Hill is replacing was built in 1936 and, because of its low overflow elevation, holds only about 70,000 usable gallons - 14% of its 500,000-gallon nameplate - for a system that pumps 1.5 to 5 million…
- The plant produced more than 801 million gallons in 2025, and the village still keeps standby connections to Greater Cincinnati Water Works - which it actually used during the 2024 summer drought.
History5
- 1949Indian Hill Water Works established with construction of the treatment plant on State Route 126 (Glendale Milford Road).
- 2011Ohio EPA endorsed the Indian Hill Water Works Source Water Assessment and Protection Plan, which rated the aquifer highly susceptible to contamination.
- 2024During the summer drought the village used its emergency connections with Greater Cincinnati Water Works to buy supplemental water.
- 2025Village Council approved rebuilding the 1936 water tower at its existing 5355 Miami Road site in November, after an AECOM engineering study confirmed the site was feasible.
- 20265% water rate increase for all customers effective July 1; Council also began readings on a Chapter 51 amendment moving water billing from quarterly to monthly.
Treatment & pressure
How it is treated
Nine groundwater wells along the Little Miami River, in Hamilton and Clermont counties between Milford and Camp Dennison, feed a treatment plant sitting adjacent to the wellfield at 7100 Glendale Milford Road (State Route 126). The groundwater is softened to remove a portion of the hardness…
Source: storage.googleapis.comindianhill.gov
Water pressure
No system-wide psi figure is published. The village does report that its 1936 elevated tower at 5355 Miami Road delivers only about 70,000 gallons of effective operating storage -…
Source: indianhill.gov
What it costs
$9.02 per 1,000 gallons
Typical household bill about $45 a month for water.
Village schedule with a 5% increase for all customers effective July 1, 2026. A 5/8-inch meter pays an $87.75 minimum quarterly charge covering 13 ccf (about 9,724 gallons), then…
Water quality & impurities10
| Contaminant | Level | Limit | Year |
|---|---|---|---|
| Total trihalomethanes (TTHM) Range 28.9-31.4 ppb. Chlorination by-product. | 31.4 ppb | 80 | 2025 |
| Haloacetic acids (HAA5) Range 7.4-7.7 ppb. | 7.7 ppb | 60 | 2025 |
| Total chlorine Range 0.79-1.01 ppm. | 0.92 ppm | 4 (MRDL) | 2025 |
| Fluoride Added for dental health; range 0.81-1.08 ppm. | 1.04 ppm | 4 | 2025 |
| Nitrate The village's own CCR flags nitrate as detected at a level of concern - evidence of land-use impact on this shallow… | 1.63 ppm | 10 | 2025 |
| Barium Monitored less than annually; erosion of natural deposits. | 0.029 ppm | 2 | 2024 |
| Lead (90th percentile) Zero of 31 samples above the action level. | 1.65 ppb | 15 (action… | 2025 |
| Copper (90th percentile) Zero of 31 samples above the action level. | 0.918 ppm | 1.3 (action… | 2025 |
| Chloroform Range 14.12-15.75 ppb; the dominant component of the system's trihalomethanes. | 14.94 ppb | no MCL… | 2025 |
| Bromodichloromethane Range 9.08-9.85 ppb; MCLG 0. | 9.47 ppb | no MCL… | 2025 |
Source: storage.googleapis.com
EPA compliance record
Lead at the tap: 90th-percentile result 1.6 ppb in 2025 (action level 15 ppb).
EPA record: no health-based violations since 2015.
Projects & plans4
Recent and current work
- Source water protection measures at the shooting ranges, salt storage and wellfield · completed
Since the 2011 Ohio EPA endorsement the village added best management practices for lead at the Indian Hill Shooting Ranges and for road salt storage at the… - UCMR 5 PFAS monitoring · 2024 · completed
The village completed part of its federal PFAS monitoring obligation through the Unregulated Contaminant Monitoring Rule 5 program; results were published in…
Source: storage.googleapis.com
Planned or needed
- New elevated water tower at 5355 Miami Road · 2027 · planned
Replaces the 1936 tower, going from about 70,000 gallons of effective operating storage to 1-1.5 million gallons and raising system pressure by roughly 3.03… - PFAS removal treatment · 2029 · planned
The village has submitted a general plan for PFAS removal to Ohio EPA and is awaiting approval; design and construction follow, with the facility to be…
Supply stress
Quality-side stress is documented and specific: the Ohio EPA-endorsed source water assessment rates the aquifer supplying Indian Hill highly susceptible to contamination for three stated reasons - no protective clay, shale or other low-permeability layer over the aquifer; a shallow aquifer only 15-30 feet below the surface; and man-made…
Source: storage.googleapis.com
Sewers
Sanitary
Indian Hill does not treat wastewater. Sewer charges appear on the village utility bill, but the rates are set by the Metropolitan Sewer District of Greater Cincinnati, most recently effective January 1, 2026; the village's published schedule notes a sewer winter high cap that resets in February, March and April.
Storm
Not documented in the village sources reviewed - no stormwater utility, fee or drainage program appears in the water works, rate or CCR material.
Source: storage.googleapis.com
Sourcesverified
Compiled from the utility's own reports and public records, then independently re-checked against primary sources.
Main supplier in 3 ZIP codes
Serves
Main water supplier in 3 ZIP codes
- 45111 · Symmes Township and Camp Dennison100% of residents
- 45174 · Terrace Park87% of residents
- 45243 · Madeira and Cincinnati68% of residents
Also present in 3 more ZIP codes
- 45242 · Blue Ash and Cincinnati4% of residents
- 45249 · Symmes Township and Cincinnati0% of residents
- 45150 · Miami Township and Milford0% 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
Indian Hill 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 Indian Hill City.
Photograph
On the map
Show this system's territory on the map — 6 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
Indian Hill City's own pages: indianhill.gov, cms6.revize.com
Notable facts: storage.googleapis.com, indianhill.gov, indianhill.gov, storage.googleapis.com
History: indianhill.gov, storage.googleapis.com, indianhill.gov, indianhill.gov
Water quality: storage.googleapis.com
Planned work: indianhill.gov, storage.googleapis.com
Water pressure: indianhill.gov
Capital projects: storage.googleapis.com
Rates: storage.googleapis.com, indianhill.gov
Sewers: storage.googleapis.com
Treatment: storage.googleapis.com, indianhill.gov
Supply stress: storage.googleapis.com