County · Iowa
Fayette County, Iowa: drinking water records
This overview covers 15 ZIP codes and 11 community water systems in Fayette County. It also stands in for 2 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 |
|---|---|---|---|---|---|
| Oelwein Municipal Water Works IA3353088 | 5,920 | 180 | 0 | 0 | 4.2 ppb |
| Clermont Water Supply IA3317047 | 586 | 60 | 0 | 0 | 6.8 ppb |
| Wadena Water System IA3371056 | 209 | 0 | 0 | 1 | 0.8 ppb |
| West Union Water Supply IA3383014 | 2,540 | 0 | 0 | 0 | 3 ppb |
| Fayette Water Supply IA3342041 | 1,256 | 0 | 0 | 0 | 4.5 ppb |
| Elgin Municipal Water Supply IA3338010 | 685 | 0 | 0 | 0 | 8.5 ppb |
| Maynard Water Supply IA3350059 | 476 | 0 | 0 | 0 | 0.6 ppb |
| Hawkeye Water Supply IA3346037 | 438 | 0 | 0 | 0 | 0.8 ppb |
| Arlington Water Supply IA3307065 | 419 | 0 | 0 | 0 | 0 ppb |
| Waucoma Water Supply IA3375001 | 229 | 0 | 0 | 0 | 9.6 ppb |
| Westgate Water Supply IA3379009 | 192 | 0 | 0 | 0 | 4.2 ppb |
ZIP reports in Fayette County
No ZIP report in this county is published yet.
These ZIP codes are covered by this overview because their utility has too little EPA data for a separate page: 50664, 52164.
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.