Water quality in Oak Harbor, Ohio
Oak Harbor is in Ottawa County. 36 active public water systems serve the county; 17 had an EPA violation in the past three years.
Most likely your provider
Your location is within the outer bounds of this system's EPA service area.
Other community water systems in Ottawa County
9 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Carroll Water and Sewer |
2,288 | 1 | 7.3 mi | |
| Green Valley Mobile Home Park |
82 | 2 | 7.5 mi | |
| Greenwood Mobile Home Park |
77 | 1 | 8.3 mi | |
| Elmore Village |
1,421 | 2 | 8.5 mi | |
| Port Clinton City |
6,500 | 1 | 9.2 mi | |
| Ottawa County Regional Water District |
20,428 | 0 | 11.0 mi | |
| Genoa Village |
3,110 | 3 | 11.7 mi | |
| Put-In-Bay Village |
5,000 | 2 | 18.5 mi | |
| Marblehead Village |
865 | 4 | 21.1 mi |
Non-community systems in Ottawa County (26: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
ST John Lutheran Church Rocky Ridge |
60 | 1 | 0 | |
|
Bethel United Brethren Church Elmore |
100 | 0 | 0 | |
|
Kaisers Limestone Tavern |
54 | 0 | 0 | |
|
Bench, Robert Amlc PWS |
42 | 0 | 0 | |
|
North Point Education Service Ctr Ottawa |
60 | 0 | 0 | |
|
Sugar Creek Golf Club |
78 | 2 | 0 | |
|
Grace Lutheran Church Elmore |
81 | 0 | 0 | |
|
Rothert Amlc |
25 | 0 | 0 | |
|
ST Peters Lutheran Church/preschool |
89 | 0 | 0 | |
|
Blackberry Corners |
150 | 0 | 0 | |
|
Ernestos Restaurant |
71 | 0 | 0 | |
|
Graymont Dolime (oh) |
60 | 0 | 0 | |
|
Bench-Dickinson Amlc PWS |
25 | 0 | 0 | |
|
Crazy Lady Saloon |
100 | 0 | 0 | |
|
Chippewa Golf Club |
150 | 0 | 0 | |
|
Hidden Hideaway Campground West-Rear |
50 | 1 | 0 | |
|
Hidden Hideaway Campground East-Front |
30 | 1 | 0 | |
|
Cedarlane RV Park |
600 | 0 | 0 | |
|
Catawba Shores M H Court |
102 | 1 | 0 | |
|
J F Walleye |
207 | 1 | 0 | |
|
ST Hazards Middle Bass Island |
300 | 2 | 0 | |
|
Lake Erie Utilities Company |
400 | 0 | 0 | |
|
The Keg |
115 | 2 | 1 | |
|
Shade Acres Campground and RV Park |
75 | 0 | 0 | |
|
The Mockingbird on Mill Road |
53 | 0 | 0 | |
|
Elliston Zion Umc Graytown |
40 | 0 | 0 |
About this data
Water systems are matched to Ottawa County, nearest to Oak Harbor first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system.
Town locations and ZIP code areas come from U.S. Census Bureau 2020 files.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Ohio records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.