County · Ohio
Butler County, Ohio: drinking water records
This overview covers 14 ZIP codes and 13 community water systems in Butler County. It also stands in for 0 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Butler Co. Water District 2 PWS OH0900303 | 116,572 | 180 | 2 | 0 | 0 ppb |
| Hamilton Public Water System OH0904012 | 62,447 | 120 | 3 | 0 | 2 ppb |
| Middletown City PWS OH0901712 | 51,229 | 60 | 1 | 0 | 1.1 ppb |
| Fairfield City PWS OH0900715 | 44,907 | 60 | 4 | 0 | 0 ppb |
| Southwest Regional Water District OH0903912 | 42,856 | 120 | 1 | 0 | 1.3 ppb |
| Oxford City PWS OH0902312 | 24,000 | 60 | 1 | 0 | 2.4 ppb |
| Monroe City PWS OH0902012 | 15,600 | 120 | 0 | 0 | 1.6 ppb |
| Trenton City PWS OH0903012 | 13,012 | 60 | 2 | 0 | 2.3 ppb |
| New Miami Village PWS OH0902112 | 3,200 | 60 | 0 | 0 | 1.1 ppb |
| Catalina Mobile Home Park OH0900512 | 1,280 | 0 | 0 | 0 | 0.7 ppb |
| Seven Mile Village PWS OH0902612 | 1,000 | 0 | 0 | 0 | 1.9 ppb |
| Crouse Mobile Home Park & Sales, LLC OH0902912 | 247 | 0 | 0 | 0 | 5.8 ppb |
| Inverness Park FL6090875 | 200 | 0 | 0 | 0 | 0 ppb |
ZIP reports in Butler County
No ZIP report in this county is published yet.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.