Public water system · OH6205011
ActiveOttawa County Regional Water District
At a glance
Ottawa County Regional Water District (PWSID OH6205011) is an active community water system in Ottawa County, Ohio. It reports serving 20,428 people through 8,372 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in January 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
20,428
Service connections
8,372
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Ottawa County Regional Water District compare with other water systems in Ottawa County?
By EPA's size categories, Ottawa County Regional Water District is a large system (10,001 to 100,000 people). Ottawa County has 36 active public water systems, and Ottawa County Regional Water District is the largest of them by population served. Its population served is about 16 times the county average of 1,317 people per system, and accounts for 43% of the 47,393 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 Ottawa County Regional Water District is about 3 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 102 Ohio systems (2.6%) list surface water as their primary source.
Who owns and regulates Ottawa County Regional Water District?
EPA lists Ottawa County Regional Water District 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. 8 of the 36 active systems in Ottawa County (22%) are also owned by a local government.
Does Ottawa County Regional Water District have drinking water violations?
EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in January 2020. The violations listed here began between July 2001 and January 2020. By type: 3 public notice, recordkeeping or other and 1 required treatment not met. The contaminant or rule involved most often is Consumer Confidence Rule (3 of them). EPA lists 4 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 |
|---|---|---|---|---|
| 2020-01-06 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2005-06-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 2004-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2001-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
All 4 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.
Ottawa County Regional Water District: frequently asked questions
Who runs Ottawa County Regional Water District?
Ottawa County Regional Water District (PWSID OH6205011) is a community water system owned by a local government. It is regulated by the OH state drinking water program.
How many people does Ottawa County Regional Water District serve?
Ottawa County Regional Water District reports serving 20,428 people through 8,372 service connections in Ottawa County, Ohio.
Where does Ottawa County Regional Water District get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Ottawa County Regional Water District have any drinking water violations?
EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in January 2020. 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 Ottawa County Regional Water District'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 4 violations for this system; 1 is health-based, and the most recent began in January 2020. For current results, consult the system's annual water quality report, EPA ECHO, or the OH state drinking water program.
Where can I find Ottawa County Regional Water District's water quality report?
As a community water system, Ottawa County Regional Water District 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 Ottawa County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Port Clinton City | Ottawa | 6,500 | Community | Purchased surface water |
| Put-in-Bay Village | Ottawa | 5,000 | Community | Surface water |
| Oak Harbor Village | Ottawa | 4,400 | Community | Purchased surface water |
| Genoa Village | Ottawa | 3,110 | Community | Purchased surface water |
| Carroll Water and Sewer | Ottawa | 2,288 | Community | Surface water |
| Elmore Village | Ottawa | 1,421 | Community | Purchased surface water |
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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, “Ottawa County Regional Water District, PWSID OH6205011, Ohio”, https://aquacensus.com/water-systems/ohio/ottawa-county-regional-water-district-oh6205011 (data as of October 1, 2026).