County · Idaho
Boise County, Idaho: drinking water records
This overview covers 6 ZIP codes and 20 community water systems in Boise 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 |
|---|---|---|---|---|---|
| Idaho City Water Dept ID4080025 | 531 | 0 | 0 | 10 | 2 ppb |
| Wilderness Ranch Owners Association INC ID4080055 | 525 | 0 | 0 | 3 | 3 ppb |
| Terrace Lakes Water Company ID4080047 | 475 | 0 | 0 | 4 | 4 ppb |
| Mountain View Water and Road Assn ID4080031 | 305 | 0 | 0 | 3 | 0 ppb |
| Castle Mountain Creeks Owners Assn ID4080007 | 250 | 0 | 0 | 9 | 1 ppb |
| Rivers Point Property Owners Assn ID4080037 | 140 | 0 | 0 | 1 | 3 ppb |
| Mountain Shadows HOA INC. ID4080100 | 89 | 0 | 0 | 2 | 4 ppb |
| Garden Valley Ranchettes Homeowners ID4080018 | 78 | 0 | 0 | 13 | 0 ppb |
| Horseshu Vue Ranch Subd ID4080095 | 51 | 0 | 0 | 3 | 5 ppb |
| Horseshoe Bend Water Supply ID4080024 | 750 | 0 | 0 | 0 | 2 ppb |
| Scriver Woods Homeowners Assn ID4080034 | 310 | 0 | 0 | 0 | 0 ppb |
| Duquette Pines Homeowners Association ID4080016 | 163 | 0 | 0 | 0 | 1 ppb |
| Mores Creek Rim Ranch Water Dist ID4080029 | 140 | 0 | 0 | 0 | 3 ppb |
| Valley Hi Estates ID4080051 | 140 | 0 | 0 | 0 | 8 ppb |
| Osprey ID4080101 | 100 | 0 | 0 | 0 | 2 ppb |
| Ranch Subd ID4080036 | 65 | 0 | 0 | 0 | 0 ppb |
| Shilo Ranch Estates ID4080042 | 44 | 0 | 0 | 0 | 0 ppb |
| Scenic Properties Water Assn INC ID4080040 | 40 | 0 | 0 | 0 | 4 ppb |
| Boise Holcomb Water Users Assoc. INC ID4080004 | 36 | 0 | 0 | 0 | 2 ppb |
| Southfork Landing INC ID4080117 | 25 | 0 | 0 | 0 | 3 ppb |
ZIP reports in Boise 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: 83602.
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.