County · Iowa
Cass County, Iowa: drinking water records
This overview covers 8 ZIP codes and 8 community water systems in Cass 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 |
|---|---|---|---|---|---|
| Atlantic Municipal Utilities IA1509074 | 7,252 | 60 | 0 | 0 | 2 ppb |
| Anita Municipal Utilities IA1503053 | 972 | 60 | 0 | 0 | 1 ppb |
| Massena Water Supply IA1558055 | 364 | 0 | 0 | 2 | 1 ppb |
| Lewis Water Supply IA1535078 | 357 | 0 | 0 | 1 | 2 ppb |
| Griswold Water Supply IA1528010 | 1,008 | 0 | 0 | 0 | 3 ppb |
| Cumberland Water Supply IA1516093 | 266 | 0 | 0 | 0 | 1.6 ppb |
| Wiota Water Works IA1570032 | 95 | 0 | 0 | 0 | 1 ppb |
| Sioux Trails MO3036216 | 72 | 0 | 0 | 0 | 2.0 ppb |
ZIP reports in Cass 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.