Public water system · OH3102612
ActiveCincinnati Public Water System
At a glance
Cincinnati Public Water System (PWSID OH3102612) is an active community water system in Hamilton County, Ohio. It reports serving 750,200 people through 244,716 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
750,200
Service connections
244,716
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Cincinnati Public Water System compare with other water systems in Hamilton County?
By EPA's size categories, Cincinnati Public Water System is a very large system (more than 100,000 people). Hamilton County has 26 active public water systems, and Cincinnati Public Water System is the largest of them by population served. Its population served is about 23 times the county average of 32,385 people per system, and accounts for 89% of the 842,012 people reported by systems filed under the county. Across Ohio, the 3,854 active systems average 2,767 people each. Nationally, the average active community water system reports serving 6,703 people, so Cincinnati Public Water System is about 112 times that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Ohio has 1,028 active community water systems, 27% of the state's 3,854 active systems. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 102 Ohio systems (2.6%) list surface water as their primary source.
Who owns and regulates Cincinnati Public Water System?
EPA lists Cincinnati Public Water System as owned by a local government. The OH state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 9 of the 26 active systems in Hamilton County (35%) are also owned by a local government.
Does Cincinnati Public Water System have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for Cincinnati Public Water System. For the latest compliance status, check EPA ECHO for current compliance history.
Cincinnati Public Water System: frequently asked questions
Who runs Cincinnati Public Water System?
Cincinnati Public Water System (PWSID OH3102612) is a community water system owned by a local government. It is regulated by the OH state drinking water program.
How many people does Cincinnati Public Water System serve?
Cincinnati Public Water System reports serving 750,200 people through 244,716 service connections in Hamilton County, Ohio.
Where does Cincinnati Public Water System get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Cincinnati Public Water System have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Cincinnati Public Water System's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's Safe Drinking Water Act records list no violations for this system. For current results, consult the system's annual water quality report, EPA ECHO, or the OH state drinking water program.
Where can I find Cincinnati Public Water System's water quality report?
As a community water system, Cincinnati Public Water System must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Hamilton County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Norwood City Pws | Hamilton | 19,870 | Community | Purchased surface water |
| Indian Hill City Pws | Hamilton | 15,000 | Community | Groundwater |
| Harrison City Pws | Hamilton | 11,600 | Community | Groundwater |
| Wyoming City Pws | Hamilton | 9,700 | Community | Groundwater |
| Reading City Pws | Hamilton | 9,506 | Community | Purchased surface water |
| Cleves Village Pws | Hamilton | 6,000 | Community | Groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Cincinnati Public Water System, PWSID OH3102612, Ohio”, https://aquacensus.com/water-systems/ohio/cincinnati-public-water-system-oh3102612 (data as of October 1, 2026).