COUNTY WATER-SYSTEM LEDGER
Butler, Pennsylvania
EPA’s September 2026 export lists 8 active community water systems serving Butler, Pennsylvania, 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 Butler, Pennsylvania
EPA associates 8 covered systems with Butler, Pennsylvania; their reported population-served values total 127,456 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 |
|---|---|---|---|
| Pa American Water Co ButlerPA5100012 | 43,286 | Surface water | No current violation flagged |
| Cranberry Twp WtpPA5100094 | 42,000 | Surface water purchased | No current violation flagged |
| Slippery Rock Muni AuthPA5100079 | 15,778 | Ground water | No current violation flagged |
| Municipal Water Auth Adams TwpPA5100141 | 8,700 | Surface water purchased | No current violation flagged |
| Harmony Boro Water AuthPA5100042 | 6,669 | Surface water | Other current violation flag |
| Zelienople BoroPA5100093 | 4,123 | Surface water purchased | Other current violation flag |
| Petroleum Valley RwaPA5100147 | 3,800 | Ground water purchased | No current violation flagged |
| Seven Fields Boro Water DeptPA5100135 | 3,100 | Surface water purchased | No current violation flagged |
02 / SOURCE MIX
Primary water sources for Butler, Pennsylvania
EPA classifies 8 systems serving Butler, Pennsylvania across 4 primary-source categories; Surface water purchased is the largest category with 4 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.