County · Idaho
Jefferson County, Idaho: drinking water records
This overview covers 7 ZIP codes and 18 community water systems in Jefferson County. It also stands in for 4 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 |
|---|---|---|---|---|---|
| Rigby City of ID7260032 | 5,400 | 300 | 0 | 1 | 8 ppb |
| Pepperwood Crossing/Rocky Mnt Utilities ID7260080 | 336 | 0 | 0 | 4 | 1 ppb |
| Sunbrook Estates Div # 2 ID7260079 | 144 | 0 | 0 | 1 | 0 ppb |
| Rolling Hills Acres ID7260081 | 141 | 0 | 0 | 5 | 0 ppb |
| Elk Meadows ID7260070 | 100 | 0 | 0 | 1 | 2 ppb |
| Skyview Mobile Home Park OK2002601 | 24 | 0 | 0 | 1 | 0 ppb |
| Roberts City of ID7260035 | 680 | 0 | 0 | 0 | 3 ppb |
| Ririe City of ID7260034 | 656 | 0 | 0 | 0 | 7 ppb |
| Morning View Water Company ID7260063 | 459 | 0 | 0 | 0 | 1 ppb |
| Country Squire Estates ID7260007 | 450 | 0 | 0 | 0 | 2 ppb |
| M and T Water and Sewer Dist ID7260026 | 358 | 0 | 0 | 0 | 0 ppb |
| Jefferson Greens Estates ID7260075 | 193 | 0 | 0 | 0 | 0 ppb |
| Jenco Acres ID7260018 | 105 | 0 | 0 | 0 | 1 ppb |
| Bear Island Water Assn ID7260002 | 100 | 0 | 0 | 0 | 0 ppb |
| Parkwood Acres Water Company ID7260029 | 88 | 0 | 0 | 0 | 1 ppb |
| Ireland Acres 1 ID7260017 | 54 | 0 | 0 | 0 | 5 ppb |
| Hillman Trailer Court ID7260084 | 45 | 0 | 0 | 0 | 1 ppb |
| Country Living Center ID7260047 | 30 | 0 | 0 | 0 | 5 ppb |
ZIP reports in Jefferson 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: 83425, 83431, 83434, 83450.
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.