COUNTY WATER-SYSTEM LEDGER
Butler, Ohio
EPA’s September 2026 export lists 9 active community water systems serving Butler, Ohio, with 4 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, Ohio
EPA associates 9 covered systems with Butler, Ohio; their reported population-served values total 373,823 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 |
|---|---|---|---|
| Butler Co. Water District 2 PWSOH0900303 | 116,572 | Surface water purchased | No current violation flagged |
| Hamilton Public Water SystemOH0904012 | 62,447 | Ground water | Other current violation flag |
| Middletown City PWSOH0901712 | 51,229 | Ground water | Other current violation flag |
| Fairfield City PWSOH0900715 | 44,907 | Ground water | No current violation flagged |
| Southwest Regional Water DistrictOH0903912 | 42,856 | Ground water | No current violation flagged |
| Oxford City PWSOH0902312 | 24,000 | Ground water | No current violation flagged |
| Monroe City PWSOH0902012 | 15,600 | Surface water purchased | Other current violation flag |
| Trenton City PWSOH0903012 | 13,012 | Ground water | Other current violation flag |
| New Miami Village PWSOH0902112 | 3,200 | Ground water | No current violation flagged |
02 / SOURCE MIX
Primary water sources for Butler, Ohio
EPA classifies 9 systems serving Butler, Ohio across 2 primary-source categories; Ground water is the largest category with 7 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.