Public water system · OH0100503
ActiveWest Union Public Water System
At a glance
West Union Public Water System (PWSID OH0100503) is an active community water system in Adams County, Ohio. It reports serving 3,170 people through 1,585 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. EPA's records list 8 violations for this system; 3 are health-based, and the most recent began in July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
3,170
Service connections
1,585
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does West Union Public Water System compare with other water systems in Adams County?
By EPA's size categories, West Union Public Water System is a small system (501 to 3,300 people). Adams County has 6 active public water systems, and West Union Public Water System is the 2nd-largest of them by population served. Its population served is about 39% below the county average of 5,166 people per system, and accounts for 10% of the 30,997 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 West Union Public Water System is about half of 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. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. 114 Ohio systems (3%) list purchased groundwater as their primary source.
Who owns and regulates West Union Public Water System?
EPA lists West Union 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. 6 of the 6 active systems in Adams County (100%) are also owned by a local government.
Does West Union Public Water System have drinking water violations?
EPA's records list 8 violations for this system; 3 are health-based, and the most recent began in July 2025. The violations listed here began between November 1993 and July 2025. By type: 2 reporting, 2 monitoring and reporting, 2 contaminant level above the legal limit, 1 required treatment not met and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Lead and Copper Rule Revisions (3 of them). EPA lists 8 as resolved. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-07-02 | ReportingNotification, Known or Potential LSL · code 4H | Lead and Copper Rule Revisionscode 5200 | No | Resolved |
| 2024-10-17 | ReportingLSL Reporting · code 4G | Lead and Copper Rule Revisionscode 5200 | No | Resolved |
| 2024-10-17 | Required treatment not metLSL Inventory · code 2E | Lead and Copper Rule Revisionscode 5200 | Yes | Resolved |
| 2013-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2013-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2012-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 1993-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1993-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 8 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.
West Union Public Water System: frequently asked questions
Who runs West Union Public Water System?
West Union Public Water System (PWSID OH0100503) is a community water system owned by a local government. It is regulated by the OH state drinking water program.
How many people does West Union Public Water System serve?
West Union Public Water System reports serving 3,170 people through 1,585 service connections in Adams County, Ohio.
Where does West Union Public Water System get its water?
EPA SDWIS lists this system's primary water source as purchased groundwater. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own.
Does West Union Public Water System have any drinking water violations?
EPA's records list 8 violations for this system; 3 are health-based, and the most recent began in July 2025. 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 West Union 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 records list 8 violations for this system; 3 are health-based, and the most recent began in July 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the OH state drinking water program.
Where can I find West Union Public Water System's water quality report?
As a community water system, West Union 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 Adams County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Adams County Regional Wd Pws | Adams | 21,810 | Community | Groundwater |
| Manchester Village | Adams | 2,043 | Community | Groundwater |
| Peebles Public Water System | Adams | 1,978 | Community | Purchased groundwater |
| Winchester Public Water System | Adams | 1,052 | Community | Purchased groundwater |
| Seaman Village Pws | Adams | 944 | Community | Purchased 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, “West Union Public Water System, PWSID OH0100503, Ohio”, https://aquacensus.com/water-systems/ohio/west-union-public-water-system-oh0100503 (data as of October 1, 2026).