County · Iowa
Hancock County, Iowa: drinking water records
This overview covers 9 ZIP codes and 8 community water systems in Hancock 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 |
|---|---|---|---|---|---|
| Crystal Lake Water Supply IA4115092 | 255 | 0 | 0 | 1 | 0 ppb |
| Garner Water Works IA4130075 | 3,065 | 0 | 0 | 0 | 2 ppb |
| Britt Water Works IA4103045 | 2,064 | 0 | 0 | 0 | 2 ppb |
| Kanawha Water Supply IA4150014 | 658 | 0 | 0 | 0 | 2.5 ppb |
| Klemme Water Works IA4155035 | 441 | 0 | 0 | 0 | 0 ppb |
| Corwith Water Supply IA4109077 | 266 | 0 | 0 | 0 | 2 ppb |
| Woden Water Supply IA4170033 | 188 | 0 | 0 | 0 | 4 ppb |
| Goodell Water Supply IA4135093 | 140 | 0 | 0 | 0 | 3 ppb |
ZIP reports in Hancock 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.