County · Iowa
Story County, Iowa: drinking water records
This overview covers 15 ZIP codes and 20 community water systems in Story 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 |
|---|---|---|---|---|---|
| Ames Water Treatment Plant IA8503039 | 55,177 | 56 | 0 | 0 | 0 ppb |
| Isu IA8503528 | 42,000 | 56 | 0 | 0 | 1.2 ppb |
| Ia Regional Utilities Assoc (Waverly) IA0990701 | 37,820 | 180 | 0 | 0 | 1.5 ppb |
| Nevada Water Supply IA8562044 | 6,925 | 60 | 0 | 0 | 0 ppb |
| Huxley Waterworks Dept IA8538066 | 4,244 | 60 | 0 | 0 | 1.1 ppb |
| Story City Water Dept IA8584000 | 3,357 | 60 | 0 | 0 | 0 ppb |
| Slater Muni Water Dept IA8580057 | 1,548 | 0 | 0 | 1 | 7 ppb |
| Cambridge Water Supply IA8509069 | 832 | 60 | 1 | 0 | 2 ppb |
| Maple Grove MHC IA0800601 | 160 | 0 | 0 | 4 | 0 ppb |
| Roland Water Supply IA8570001 | 1,394 | 0 | 0 | 0 | 0 ppb |
| Gilbert Water Supply IA8531083 | 1,211 | 0 | 0 | 0 | 0 ppb |
| Maxwell Water Department IA8557058 | 859 | 0 | 0 | 0 | 4 ppb |
| Colo Water Supply IA8520061 | 853 | 0 | 0 | 0 | 1.1 ppb |
| Zearing Water Department IA8590041 | 528 | 0 | 0 | 0 | 6 ppb |
| Collins Water Supply IA8515060 | 505 | 0 | 0 | 0 | 0.8 ppb |
| Mccallsburg Water Supply IA8552010 | 353 | 0 | 0 | 0 | 6.8 ppb |
| Kelley Water Supply IA8548016 | 304 | 0 | 0 | 0 | 0 ppb |
| New Horizons MHP LLC IA8538601 | 298 | 0 | 0 | 0 | 0.6 ppb |
| Hammond Estates IA8580601 | 150 | 0 | 0 | 0 | 0 ppb |
| Squaw Valley South Subdivision IA8503305 | 105 | 0 | 0 | 0 | 30 ppb |
ZIP reports in Story 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.