Public water system · OH5401212
ActiveSaint Charles Center
At a glance
Saint Charles Center (PWSID OH5401212) is an active community water system in Mercer County, Ohio. It reports serving 142 people through 2 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in July 2015.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
142
Service connections
2
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Saint Charles Center compare with other water systems in Mercer County?
By EPA's size categories, Saint Charles Center is a very small system (500 people or fewer). Mercer County has 77 active public water systems. Its population served is about 64% below the county average of 397 people per system, and accounts for 0.5% of the 30,601 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 Saint Charles Center 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 Saint Charles Center?
EPA lists Saint Charles Center 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. 69 of the 77 active systems in Mercer County (90%) are also privately owned.
Does Saint Charles Center have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in July 2015. The violations listed here began between April 2001 and July 2015. By type: 7 monitoring and reporting, 4 public notice, recordkeeping or other and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Consumer Confidence Rule (4 of them). EPA lists 12 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 |
|---|---|---|---|---|
| 2015-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2004-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2004-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2004-05-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2002-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2001-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | 2,4-Dcode 2105 | No | Resolved |
| 2001-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Benzo(a)pyrenecode 2306 | No | Resolved |
| 2001-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Polychlorinated biphenyls (PCBs), totalcode 2383 | No | Resolved |
| 2001-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Di(2-ethylhexyl) phthalatecode 2039 | No | Resolved |
| 2001-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Glyphosatecode 2034 | No | Resolved |
| 2001-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Di(2-ethylhexyl) adipatecode 2035 | No | Resolved |
| 2001-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Methoxychlorcode 2015 | No | 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.
Saint Charles Center: frequently asked questions
Who runs Saint Charles Center?
Saint Charles Center (PWSID OH5401212) is a community water system privately owned. It is regulated by the OH state drinking water program.
How many people does Saint Charles Center serve?
Saint Charles Center reports serving 142 people through 2 service connections in Mercer County, Ohio.
Where does Saint Charles Center 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 Saint Charles Center have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in July 2015. 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 Saint Charles Center'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. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in July 2015. For current results, consult the system's annual water quality report, EPA ECHO, or the OH state drinking water program.
Where can I find Saint Charles Center's water quality report?
As a community water system, Saint Charles Center 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 Mercer County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Celina, City of | Mercer | 11,682 | Community | Surface water |
| Coldwater Village | Mercer | 4,774 | Community | Groundwater |
| St Henry Village | Mercer | 2,596 | Community | Groundwater |
| Ft Recovery Village | Mercer | 1,501 | Community | Groundwater |
| Rockford Village | Mercer | 1,120 | Community | Groundwater |
| Mendon Village | Mercer | 628 | 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, “Saint Charles Center, PWSID OH5401212, Ohio”, https://aquacensus.com/water-systems/ohio/saint-charles-center-oh5401212 (data as of October 1, 2026).