Public water system · OH1401211
ActiveWilmington City Pws
At a glance
Wilmington City Pws (PWSID OH1401211) is an active community water system in Clinton County, Ohio. It reports serving 12,401 people through 5,198 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 9 are health-based, and the most recent began in December 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
12,401
Service connections
5,198
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Wilmington City Pws compare with other water systems in Clinton County?
By EPA's size categories, Wilmington City Pws is a large system (10,001 to 100,000 people). Clinton County has 9 active public water systems, and Wilmington City Pws is the largest of them by population served. Its population served is about 4.4 times the county average of 2,810 people per system, and accounts for 49% of the 25,290 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 Wilmington City Pws is about 85% above 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 Wilmington City Pws?
EPA lists Wilmington City Pws 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. 5 of the 9 active systems in Clinton County (56%) are also owned by a local government.
Does Wilmington City Pws have drinking water violations?
Of the 12 most recent violations in EPA's records, 9 are health-based, and the most recent began in December 2024. The violations listed here began between December 1994 and December 2024. By type: 7 required treatment not met, 2 contaminant level above the legal limit, 2 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Surface Water Treatment Rule (9 of them). EPA lists 10 as resolved and 2 as archived. 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. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-12-19 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2014-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2013-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2010-12-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Archived |
| 2009-01-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Archived |
| 1999-01-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 1995-05-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 1995-04-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 1995-03-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 1995-02-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 1995-01-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 1994-12-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
The 12 most recent 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.
Wilmington City Pws: frequently asked questions
Who runs Wilmington City Pws?
Wilmington City Pws (PWSID OH1401211) is a community water system owned by a local government. It is regulated by the OH state drinking water program.
How many people does Wilmington City Pws serve?
Wilmington City Pws reports serving 12,401 people through 5,198 service connections in Clinton County, Ohio.
Where does Wilmington City Pws 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 Wilmington City Pws have any drinking water violations?
Of the 12 most recent violations in EPA's records, 9 are health-based, and the most recent began in December 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 Wilmington City Pws' 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. Of the 12 most recent violations in EPA's records, 9 are health-based, and the most recent began in December 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 Wilmington City Pws' water quality report?
As a community water system, Wilmington City Pws 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 Clinton County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Blanchester Village Pws | Clinton | 4,243 | Community | Surface water |
| Sabina Village Pws | Clinton | 2,564 | Community | Groundwater |
| Speedway #7190 | Clinton | 1,400 | Transient non-community | Groundwater |
| New Vienna Village | Clinton | 1,240 | Community | Groundwater |
| Speedway #8741 | Clinton | 1,200 | Transient non-community | Groundwater |
| Speedway Super-America #3593 | Clinton | 1,080 | Transient non-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, “Wilmington City Pws, PWSID OH1401211, Ohio”, https://aquacensus.com/water-systems/ohio/wilmington-city-pws-oh1401211 (data as of October 1, 2026).