Ohio
Ottawa County drinking water quality
36 active public water systems serve 47,288 people in Ottawa County. 19 are compliant, 17 had at least one EPA violation in the past three years, 1 is a designated serious violator, and 1 carries a health flag.
Needs attention
Community water systems
10 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Ottawa County Regional Water District |
20,428 | 0 | 0 | |
|
Port Clinton City |
6,500 | 1 | 1 | |
|
Put-In-Bay Village |
5,000 | 2 | 1 | |
|
Oak Harbor Village |
4,400 | 2 | 1 | |
|
Genoa Village |
3,110 | 3 | 2 | |
|
Carroll Water and Sewer |
2,288 | 1 | 1 | |
|
Elmore Village |
1,421 | 2 | 1 | |
|
Marblehead Village |
865 | 4 | 1 | |
|
Green Valley Mobile Home Park |
82 | 2 | 2 | |
|
Greenwood Mobile Home Park |
77 | 1 | 1 |
Non-community systems (26: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Cedarlane RV Park |
600 | 0 | 0 | |
|
Lake Erie Utilities Company |
400 | 0 | 0 | |
|
ST Hazards Middle Bass Island |
300 | 2 | 0 | |
|
J F Walleye |
207 | 1 | 0 | |
|
Blackberry Corners |
150 | 0 | 0 | |
|
Chippewa Golf Club |
150 | 0 | 0 | |
|
The Keg |
115 | 2 | 1 | |
|
Catawba Shores M H Court |
102 | 1 | 0 | |
|
Bethel United Brethren Church Elmore |
100 | 0 | 0 | |
|
Crazy Lady Saloon |
100 | 0 | 0 | |
|
ST Peters Lutheran Church/preschool |
89 | 0 | 0 | |
|
Grace Lutheran Church Elmore |
81 | 0 | 0 | |
|
Sugar Creek Golf Club |
78 | 2 | 0 | |
|
Shade Acres Campground and RV Park |
75 | 0 | 0 | |
|
Ernestos Restaurant |
71 | 0 | 0 | |
|
Graymont Dolime (oh) |
60 | 0 | 0 | |
|
North Point Education Service Ctr Ottawa |
60 | 0 | 0 | |
|
ST John Lutheran Church Rocky Ridge |
60 | 1 | 0 | |
|
Kaisers Limestone Tavern |
54 | 0 | 0 | |
|
The Mockingbird on Mill Road |
53 | 0 | 0 | |
|
Hidden Hideaway Campground West-Rear |
50 | 1 | 0 | |
|
Bench, Robert Amlc PWS |
42 | 0 | 0 | |
|
Elliston Zion Umc Graytown |
40 | 0 | 0 | |
|
Hidden Hideaway Campground East-Front |
30 | 1 | 0 | |
|
Bench-Dickinson Amlc PWS |
25 | 0 | 0 | |
|
Rothert Amlc |
25 | 0 | 0 |
Inactive systems (312, no longer operating or reporting)
Kept for the record and excluded from the county totals above. Browse inactive systems.
About this data
Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.
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.