Public water system · OH7100112
ActiveChillicothe City Pws
At a glance
Chillicothe City Pws (PWSID OH7100112) is an active community water system in Ross County, Ohio. It reports serving 21,725 people through 10,205 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 10 violations for this system; none is health-based, and the most recent began in July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
21,725
Service connections
10,205
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Chillicothe City Pws compare with other water systems in Ross County?
By EPA's size categories, Chillicothe City Pws is a large system (10,001 to 100,000 people). Ross County has 8 active public water systems, and Chillicothe City Pws is the 2nd-largest of them by population served. Its population served is about 150% above the county average of 8,703 people per system, and accounts for 31% of the 69,627 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 Chillicothe City Pws is about 3.2 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. 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 Chillicothe City Pws?
EPA lists Chillicothe 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 8 active systems in Ross County (63%) are also owned by a local government.
Does Chillicothe City Pws have drinking water violations?
EPA's records list 10 violations for this system; none is health-based, and the most recent began in July 2025. The violations listed here began between January 1992 and July 2025. By type: 7 monitoring and reporting, 2 public notice, recordkeeping or other and 1 reporting. The contaminant or rule involved most often is Consumer Confidence Rule (2 of them). EPA lists 8 as resolved and 2 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 |
|---|---|---|---|---|
| 2025-07-02 | ReportingNotification, Known or Potential LSL · code 4H | Lead and Copper Rule Revisionscode 5200 | No | Unaddressed |
| 2019-12-30 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Unaddressed |
| 2000-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 1999-10-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1992-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Methoxychlorcode 2015 | No | Resolved |
| 1992-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Lindane (gamma-BHC)code 2010 | No | Resolved |
| 1992-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 2,4,5-TP (Silvex)code 2110 | No | Resolved |
| 1992-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Endrincode 2005 | No | Resolved |
| 1992-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 2,4-Dcode 2105 | No | Resolved |
| 1992-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Toxaphenecode 2020 | No | Resolved |
All 10 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.
Chillicothe City Pws: frequently asked questions
Who runs Chillicothe City Pws?
Chillicothe City Pws (PWSID OH7100112) is a community water system owned by a local government. It is regulated by the OH state drinking water program.
How many people does Chillicothe City Pws serve?
Chillicothe City Pws reports serving 21,725 people through 10,205 service connections in Ross County, Ohio.
Where does Chillicothe City Pws 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 Chillicothe City Pws have any drinking water violations?
EPA's records list 10 violations for this system; none is 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 Chillicothe 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. EPA's records list 10 violations for this system; none is 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 Chillicothe City Pws' water quality report?
As a community water system, Chillicothe 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 Ross County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Ross County Water Co Inc. | Ross | 35,345 | Community | Groundwater |
| Chillicothe Correctional Institution | Ross | 9,000 | Community | Groundwater |
| Frankfort Village Pws | Ross | 1,100 | Community | Groundwater |
| Kingston Village Pws | Ross | 1,032 | Community | Purchased groundwater |
| Bainbridge Village Pws | Ross | 900 | Community | Groundwater |
| Clarksburg Village Pws | Ross | 500 | Community | Groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Chillicothe City Pws, PWSID OH7100112, Ohio”, https://aquacensus.com/water-systems/ohio/chillicothe-city-pws-oh7100112 (data as of October 1, 2026).