County drinking water records
Ottawa County, OH drinking water systems
10 community water systems serve Ottawa County, OH, reporting 44,171 people served in all. A system that also serves other counties counts all of its customers here.
4 of them (40%) had at least one health-based violation in the last 10 years. 9 systems still have one unresolved.
2 rely mainly on groundwater and 8 on surface water, counting water bought from other systems.
9 systems filed a lead service line inventory listing 63 lead lines, 27 galvanized lines that must be replaced and 2,843 lines of unknown material.
- Community water systems
- 10
- People served, sum of each system's own figure
- 44,171
- Systems with a health-based violation, last 10 years
- 4
- Systems with one unresolved
- 9
- Lead service lines in inventories
- 63
Water systems serving Ottawa County
10 systemsPeople served is each system's own figure for its whole service area. Violation counts cover the last 10 years of EPA records.
| System | Serves | People served | Main source | Health-based violations, 10 years | Unresolved | Lead lines |
|---|---|---|---|---|---|---|
| Ottawa County Regional Water District | Outside cities and towns | 20,428 | Surface water | 0 | 0 | 0 |
| Port Clinton City | Port Clinton | 6,500 | Purchased surface water | 0 | 1 | 61 |
| Put-In-Bay Village | Put-in-Bay and land outside it | 5,000 | Surface water | 3 | 1 | 2 |
| Oak Harbor Village | Oak Harbor | 4,400 | Purchased surface water | 0 | 1 | 0 |
| Genoa Village | Genoa | 3,110 | Purchased surface water | 1 | 5 | 0 |
| Carroll Water and Sewer | Outside cities and towns | 2,288 | Surface water | 0 | 1 | 0 |
| Elmore Village | Elmore | 1,421 | Purchased surface water | 0 | 2 | 0 |
| Marblehead Village | Marblehead and Lakeside | 865 | Purchased surface water | 1 | 1 | 0 |
| Green Valley Mobile Home Park | Outside cities and towns | 82 | Groundwater | 1 | 3 | No inventory |
| Greenwood Mobile Home Park | Outside cities and towns | 77 | Groundwater | 0 | 1 | 0 |
Cities and towns in Ottawa County
7 places- Elmore1 system
- Genoa1 system
- Lakeside1 system
- Marblehead1 system
- Oak Harbor1 system
- Port Clinton1 system
- Put-in-Bay1 system
Counties come from the counties EPA lists each system serving, matched to 2024 Census counties; where EPA lists none, from the county coded in the system's ID, its service area map, or its mailing address. A county holding at least a fifth of a system's service area map is added when at least a fifth of that map lies in those counties. Towns are the ones EPA lists and the Census places such a map covers, always inside those counties. In New England, where EPA's town names a whole Town, it is not matched to the village of the same name. A system is not listed in a county holding less than a fifth of its map, or in a county or town its map reaches when the map lies mostly outside the counties EPA lists, so a page can leave out a system that serves part of the area. Methodology and limitations