County · Arkansas
Washington County, Arkansas: drinking water records
This overview covers 14 ZIP codes and 12 community water systems in Washington 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 |
|---|---|---|---|---|---|
| Washington Water Authority Wwa AR0000574 | 20,140 | 120 | 0 | 4 | 1 ppb |
| Prairie Grove Waterworks AR0000573 | 9,615 | 120 | 0 | 4 | 1 ppb |
| Tontitown Waterworks AR0000566 | 7,355 | 120 | 0 | 5 | 1 ppb |
| Fayetteville Waterworks AR0000569 | 116,398 | 120 | 0 | 0 | 1 ppb |
| Springdale Water Utilities AR0000575 | 98,948 | 120 | 0 | 0 | 1 ppb |
| Madison Co Water Facilities Bd AR0000349 | 11,435 | 120 | 0 | 0 | 2 ppb |
| Lincoln Waterworks AR0000572 | 6,690 | 120 | 0 | 0 | 1 ppb |
| Mount Olive Water Association AR0000668 | 6,308 | 120 | 0 | 0 | 2 ppb |
| Elkins Waterworks AR0000567 | 3,905 | 120 | 0 | 0 | 1 ppb |
| West Fork Waterworks AR0000577 | 3,178 | 0 | 0 | 0 | 1 ppb |
| Winslow Waterworks AR0000332 | 1,433 | 0 | 0 | 0 | 2 ppb |
| Benton-Washington Regional Pwa AR0000871 | 30 | 0 | 0 | 0 | not reported |
ZIP reports in Washington 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.