County · Oklahoma
Marshall County, Oklahoma: drinking water records
This overview covers 3 ZIP codes and 7 community water systems in Marshall 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 |
|---|---|---|---|---|---|
| Marshall County Rural Water District #2 OK1010848 | 17,587 | 120 | 0 | 37 | 1.1 ppb |
| Madill OK1010820 | 3,410 | 120 | 0 | 50 | 1.7 ppb |
| Kingston Pwa OK2004501 | 1,600 | 0 | 0 | 1 | 0.5 ppb |
| Oakland Pwa OK3004513 | 1,050 | 0 | 0 | 25 | 1.5 ppb |
| Oakview Water Corp OK2004506 | 925 | 0 | 0 | 5 | 2.4 ppb |
| Cardinal Hill Subdivision OK2004539 | 475 | 0 | 0 | 2 | 0.4 ppb |
| Texoma Hills OK2004538 | 212 | 0 | 0 | 12 | 0 ppb |
ZIP reports in Marshall 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.