County · Iowa
Woodbury County, Iowa: drinking water records
This overview covers 20 ZIP codes and 17 community water systems in Woodbury County. It also stands in for 1 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 |
|---|---|---|---|---|---|
| Sioux City Water Supply IA9778054 | 85,791 | 240 | 9 | 4 | 2 ppb |
| Sergeant Bluff Water Supply IA9774033 | 5,015 | 60 | 0 | 0 | 4 ppb |
| Danbury Water Supply IA9729099 | 320 | 0 | 0 | 1 | 1.2 ppb |
| Moville Water Supply IA9753022 | 1,687 | 0 | 0 | 0 | 0.8 ppb |
| Sloan Water Supply IA9780059 | 1,042 | 0 | 0 | 0 | 6.6 ppb |
| Lawton Water Supply IA9743065 | 988 | 0 | 0 | 0 | 4.3 ppb |
| Correctionville Water Supply IA9721076 | 766 | 0 | 0 | 0 | 0.8 ppb |
| Anthon Municipal Water System IA9704060 | 545 | 0 | 0 | 0 | 2 ppb |
| Pierson Water Supply IA9766041 | 345 | 0 | 0 | 0 | 0.8 ppb |
| Salix Water Supply IA9770024 | 295 | 0 | 0 | 0 | 0.6 ppb |
| Bronson Water Supply IA9709046 | 294 | 0 | 0 | 0 | 1.9 ppb |
| Hornick Water Supply IA9738057 | 255 | 0 | 0 | 0 | 3.7 ppb |
| Cushing Water Supply IA9725094 | 230 | 0 | 0 | 0 | 2.1 ppb |
| Smithland Water Supply IA9783060 | 181 | 0 | 0 | 0 | 1.5 ppb |
| Oto Water Supply IA9758023 | 72 | 0 | 0 | 0 | 2.2 ppb |
| East Side Acres IA9700630 | 70 | 0 | 0 | 0 | 0.9 ppb |
| Berea Heights INC IA9778301 | 33 | 0 | 0 | 0 | 0.9 ppb |
ZIP reports in Woodbury 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: 51015.
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.