County · Iowa
Louisa County, Iowa: drinking water records
This overview covers 6 ZIP codes and 8 community water systems in Louisa 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 |
|---|---|---|---|---|---|
| Wapello Municipal Water Works IA5879063 | 2,096 | 0 | 0 | 0 | 2.4 ppb |
| Columbus Junction Water Supply IA5815064 | 1,830 | 0 | 0 | 0 | 0 ppb |
| Morning Sun Water Department IA5857011 | 752 | 0 | 0 | 0 | 0 ppb |
| Grandview Muni Water Dept IA5842000 | 437 | 0 | 0 | 0 | 4 ppb |
| Columbus City Public Water Supply IA5809063 | 392 | 0 | 0 | 0 | 4 ppb |
| Oakville Water Supply IA5868085 | 200 | 0 | 0 | 0 | 0 ppb |
| Woodland Wapello Mobile Home Park IA5879601 | 126 | 0 | 0 | 0 | 0 ppb |
| Louisa Co Law Enforcement Ctr IA5800901 | 46 | 0 | 0 | 0 | 1 ppb |
ZIP reports in Louisa 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.