Ohio
Miami County drinking water quality
57 active public water systems serve 99,598 people in Miami County. 28 are compliant, 29 had at least one EPA violation in the past three years, 0 are designated serious violators, and 1 carries a health flag.
Needs attention
Community water systems
16 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Nawa |
29,974 | 1 | 1 | |
|
Troy City PWS |
26,305 | 0 | 0 | |
|
Piqua City PWS |
20,354 | 2 | 2 | |
|
West Milton Village PWS |
4,890 | 1 | 1 | |
|
Miami Co-Camp Troy PWS |
3,813 | 2 | 0 | |
|
Covington Village PWS |
2,718 | 2 | 1 | |
|
Miami Co-N25a Extension |
2,367 | 2 | 0 | |
|
Pleasant Hill Village PWS |
1,226 | 1 | 0 | |
|
Bethel Township Water System PWS |
543 | 4 | 2 | |
|
Miami Co-Deer Cliff Run PWS |
526 | 2 | 0 | |
|
Laura Village PWS |
487 | 6 | 3 | |
|
Fletcher Village PWS |
461 | 1 | 1 | |
|
Casstown PWS |
271 | 0 | 0 | |
|
Northwoods MHC |
70 | 2 | 1 | |
|
Country Meadows Condo. |
65 | 1 | 1 | |
|
A and R Reck Mobile Home Park |
50 | 0 | 0 |
Non-community systems (41: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
Inactive systems (211, 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.