Public water system · OH3000603
ActiveGuernsey Co. Water Dept.
At a glance
Guernsey Co. Water Dept. (PWSID OH3000603) is an active community water system in Guernsey County, Ohio. It reports serving 8,891 people through 3,660 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 9 violations for this system; 4 are health-based, and the most recent began in November 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
8,891
Service connections
3,660
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Guernsey Co. Water Dept. compare with other water systems in Guernsey County?
By EPA's size categories, Guernsey Co. Water Dept. is a medium system (3,301 to 10,000 people). Guernsey County has 13 active public water systems, and Guernsey Co. Water Dept. is the 2nd-largest of them by population served. Its population served is about 3.6 times the county average of 2,493 people per system, and accounts for 27% of the 32,410 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 Guernsey Co. Water Dept. is about 33% 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. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 191 Ohio systems (5%) list purchased surface water as their primary source.
Who owns and regulates Guernsey Co. Water Dept.?
EPA lists Guernsey Co. Water Dept. 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 13 active systems in Guernsey County (46%) are also owned by a local government.
Does Guernsey Co. Water Dept. have drinking water violations?
EPA's records list 9 violations for this system; 4 are health-based, and the most recent began in November 2025. The violations listed here began between July 2002 and November 2025. By type: 4 contaminant level above the legal limit, 3 monitoring and reporting and 2 public notice, recordkeeping or other. The contaminant or rule involved most often is Total trihalomethanes (TTHM) (4 of them). EPA lists 8 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 |
|---|---|---|---|---|
| 2025-11-06 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Unaddressed |
| 2025-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2025-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2024-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Haloacetic acids (HAA5)code 2456 | Yes | Resolved |
| 2017-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2017-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2017-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2004-05-28 | Monitoring and reportingMonitoring, Regular · code 03 | Asbestoscode 1094 | No | Resolved |
| 2002-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
All 9 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.
Guernsey Co. Water Dept.: frequently asked questions
Who runs Guernsey Co. Water Dept.?
Guernsey Co. Water Dept. (PWSID OH3000603) is a community water system owned by a local government. It is regulated by the OH state drinking water program.
How many people does Guernsey Co. Water Dept. serve?
Guernsey Co. Water Dept. reports serving 8,891 people through 3,660 service connections in Guernsey County, Ohio.
Where does Guernsey Co. Water Dept. get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Guernsey Co. Water Dept. have any drinking water violations?
EPA's records list 9 violations for this system; 4 are health-based, and the most recent began in November 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 Guernsey Co. Water Dept.'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 9 violations for this system; 4 are health-based, and the most recent began in November 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 Guernsey Co. Water Dept.'s water quality report?
As a community water system, Guernsey Co. Water Dept. 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 Guernsey County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Cambridge, City of | Guernsey | 10,520 | Community | Surface water |
| Byesville | Guernsey | 5,104 | Community | Groundwater under influence of surface water |
| Western Guernsey Regional Water District | Guernsey | 3,225 | Community | Purchased surface water |
| Salt Fork Utility Co. | Guernsey | 2,054 | Transient non-community | Groundwater |
| Quaker City | Guernsey | 750 | Community | Purchased surface water |
| Pike'S Peak Campground | Guernsey | 700 | Transient non-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, “Guernsey Co. Water Dept., PWSID OH3000603, Ohio”, https://aquacensus.com/water-systems/ohio/guernsey-co-water-dept-oh3000603 (data as of October 1, 2026).