Public water system · OH7005032
ActiveWalnut Hills Water Association
At a glance
Walnut Hills Water Association (PWSID OH7005032) is an active community water system in Richland County, Ohio. It reports serving 583 people through 158 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 6 violations for this system; none is health-based, and the most recent began in February 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
583
Service connections
158
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Walnut Hills Water Association compare with other water systems in Richland County?
By EPA's size categories, Walnut Hills Water Association is a small system (501 to 3,300 people). Richland County has 106 active public water systems. Its population served is about 38% below the county average of 942 people per system, and accounts for 0.6% of the 99,812 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 Walnut Hills Water Association is well below 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. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 3,446 Ohio systems (89%) list groundwater as their primary source.
Who owns and regulates Walnut Hills Water Association?
EPA lists Walnut Hills Water Association as privately owned. 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. 94 of the 106 active systems in Richland County (89%) are also privately owned.
Does Walnut Hills Water Association have drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in February 2024. The violations listed here began between June 1992 and February 2024. By type: 4 monitoring and reporting and 2 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (4 of them). EPA lists 5 as resolved and 1 as unaddressed. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-02-02 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2019-01-23 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Unaddressed |
| 2008-05-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2008-03-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1993-11-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1992-06-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 6 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Walnut Hills Water Association: frequently asked questions
Who runs Walnut Hills Water Association?
Walnut Hills Water Association (PWSID OH7005032) is a community water system privately owned. It is regulated by the OH state drinking water program.
How many people does Walnut Hills Water Association serve?
Walnut Hills Water Association reports serving 583 people through 158 service connections in Richland County, Ohio.
Where does Walnut Hills Water Association get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Walnut Hills Water Association have any drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in February 2024. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Walnut Hills Water Association'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 records list 6 violations for this system; none is health-based, and the most recent began in February 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the OH state drinking water program.
Where can I find Walnut Hills Water Association's water quality report?
As a community water system, Walnut Hills Water Association 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 Richland County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Mansfield City | Richland | 51,000 | Community | Surface water |
| Shelby City | Richland | 9,453 | Community | Surface water |
| Ontario City | Richland | 6,756 | Community | Groundwater |
| Lexington Village | Richland | 4,825 | Community | Groundwater |
| Madison Water District | Richland | 2,050 | Community | Groundwater |
| Bellville Village | Richland | 1,918 | 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, “Walnut Hills Water Association, PWSID OH7005032, Ohio”, https://aquacensus.com/water-systems/ohio/walnut-hills-water-association-oh7005032 (data as of October 1, 2026).