Public water system · OH3401403
ActiveTri-County Water Authority
At a glance
Tri-County Water Authority (PWSID OH3401403) is an active community water system in Harrison County, Ohio. It reports serving 2,370 people through 783 service connections. Its primary water source is purchased groundwater, and EPA lists it as privately owned. EPA's records list 7 violations for this system; none is health-based, and the most recent began in December 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,370
Service connections
783
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does Tri-County Water Authority compare with other water systems in Harrison County?
By EPA's size categories, Tri-County Water Authority is a small system (501 to 3,300 people). Harrison County has 28 active public water systems, and Tri-County Water Authority is the 2nd-largest of them by population served. Its population served is about 4.7 times the county average of 499 people per system, and accounts for 17% of the 13,979 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 Tri-County Water Authority is about 65% 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. 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 Tri-County Water Authority?
EPA lists Tri-County Water Authority 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. 16 of the 28 active systems in Harrison County (57%) are also privately owned.
Does Tri-County Water Authority have drinking water violations?
EPA's records list 7 violations for this system; none is health-based, and the most recent began in December 2023. The violations listed here began between April 1994 and December 2023. By type: 4 monitoring and reporting, 2 public notice, recordkeeping or other and 1 monitoring. The contaminants or rules involved are Public Notice, Revised Total Coliform Rule, Stage 2 Disinfectants and Disinfection Byproducts Rule and Consumer Confidence Rule. EPA lists 6 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 |
|---|---|---|---|---|
| 2023-12-20 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2022-11-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2010-01-02 | Monitoring and reportingFailure Submit IDSE/Subpart V Plan Rpt · code 35 | Stage 2 Disinfectants and Disinfection Byproducts Rulecode 0600 | No | Resolved |
| 2009-01-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Unaddressed |
| 2008-10-01 | Monitoring and reportingMonitoring, Routine (IDSE) · code 30 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2008-10-01 | Monitoring and reportingMonitoring, Routine (IDSE) · code 30 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 1994-04-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 7 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.
Tri-County Water Authority: frequently asked questions
Who runs Tri-County Water Authority?
Tri-County Water Authority (PWSID OH3401403) is a community water system privately owned. It is regulated by the OH state drinking water program.
How many people does Tri-County Water Authority serve?
Tri-County Water Authority reports serving 2,370 people through 783 service connections in Harrison County, Ohio.
Where does Tri-County Water Authority 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 Tri-County Water Authority have any drinking water violations?
EPA's records list 7 violations for this system; none is health-based, and the most recent began in December 2023. 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 Tri-County Water Authority'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 7 violations for this system; none is health-based, and the most recent began in December 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the OH state drinking water program.
Where can I find Tri-County Water Authority's water quality report?
As a community water system, Tri-County Water Authority 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 Harrison County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Cadiz Village Pws | Harrison | 3,353 | Community | Surface water |
| Mwcd-Tappan Lake Park | Harrison | 2,012 | Transient non-community | Groundwater |
| Hopedale Village Pws | Harrison | 984 | Community | Purchased surface water |
| Scio Pws | Harrison | 690 | Community | Groundwater |
| Jewett Village | Harrison | 650 | Community | Groundwater |
| Bowerston Village Pws | Harrison | 483 | 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, “Tri-County Water Authority, PWSID OH3401403, Ohio”, https://aquacensus.com/water-systems/ohio/tri-county-water-authority-oh3401403 (data as of October 1, 2026).