County · Iowa
Osceola County, Iowa: drinking water records
This overview covers 5 ZIP codes and 7 community water systems in Osceola 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 |
|---|---|---|---|---|---|
| Osceola Rural Water System-North IA7227701 | 7,002 | 60 | 0 | 0 | 4.9 ppb |
| Sibley Public Water Supply IA7245047 | 2,860 | 0 | 0 | 0 | 1 ppb |
| Osceola Rural Water System-South IA7177701 | 2,112 | 0 | 0 | 0 | 1.7 ppb |
| Ashton Municipal Water Department IA7209069 | 456 | 0 | 0 | 0 | 1.6 ppb |
| Ocheyedan Water Works IA7239086 | 439 | 0 | 0 | 0 | 2 ppb |
| Melvin Waterworks IA7234069 | 202 | 0 | 0 | 0 | 4.6 ppb |
| Harris Water Supply IA7222034 | 151 | 0 | 0 | 0 | 2 ppb |
ZIP reports in Osceola 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.