County · Idaho
Twin Falls County, Idaho: drinking water records
This overview covers 8 ZIP codes and 13 community water systems in Twin Falls 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 |
|---|---|---|---|---|---|
| Twin Falls City of ID5420058 | 56,121 | 119 | 0 | 0 | 0 ppb |
| Kimberly City of ID5420033 | 5,359 | 0 | 0 | 1 | 4 ppb |
| Buhl City of ID5420007 | 4,518 | 300 | 0 | 0 | 0 ppb |
| Filer Water Works ID5420021 | 2,858 | 0 | 0 | 15 | 2.8 ppb |
| Hansen City of ID5420027 | 1,200 | 0 | 0 | 1 | 0 ppb |
| Meander Point Subd ID5420040 | 140 | 0 | 0 | 10 | 0 ppb |
| Murtaugh City of ID5420042 | 130 | 0 | 0 | 1 | 0 ppb |
| Rogerson Water Dist ID5420049 | 75 | 0 | 0 | 1 | 4 ppb |
| Castleford City of ID5420010 | 275 | 0 | 0 | 0 | 0 ppb |
| Hollister City of ID5420030 | 220 | 0 | 0 | 0 | 1 ppb |
| Kanaka Rapids Ranch Water System INC ID5420089 | 220 | 0 | 0 | 0 | 0 ppb |
| Rock Ledge Estates ID5420107 | 150 | 0 | 0 | 0 | 0 ppb |
| Sportsmans River Resort ID5420054 | 50 | 0 | 0 | 0 | 1 ppb |
ZIP reports in Twin Falls 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.