COUNTY WATER-SYSTEM LEDGER
Mercer, Ohio
EPA’s September 2026 export lists 3 active community water systems serving Mercer, Ohio, with 2 current-violation flags and 0 serious-violator flags among the covered systems.
Source: EPA SDWIS system-search export · Active community systems serving 2,500+ people · Snapshot 13 Sep 2026
01 / SYSTEMS
Water systems serving Mercer, Ohio
EPA associates 3 covered systems with Mercer, Ohio; their reported population-served values total 19,052 and may overlap.
Ordered by reported population served. Open any record for separate health, monitoring, notice, other, and serious-violator flags.
| Water system | Population served | Primary source | Current export status |
|---|---|---|---|
| Celina, City OfOH5400011 | 11,682 | Surface water | Other current violation flag |
| Coldwater VillageOH5400112 | 4,774 | Ground water | No current violation flagged |
| St Henry VillageOH5401312 | 2,596 | Ground water | Other current violation flag |
02 / SOURCE MIX
Primary water sources for Mercer, Ohio
EPA classifies 3 systems serving Mercer, Ohio across 2 primary-source categories; Surface water is the largest category with 1 systems.
It is the sum of each listed system's reported population served, not a census estimate. Service areas can overlap and some systems list multiple cities or counties.