Water quality for ZIP code 83631
ZIP 83631 covers Idaho City in Boise County, Idaho, one of 6 ZIP codes in the county. 56 active public water systems serve the county; 43 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Boise County
19 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Idaho City Water Dept |
531 | 1 | 12.8 mi | |
| Garden Valley Ranchettes Homeowners |
78 | 1 | 14.8 mi | |
| Osprey |
100 | 3 | 18.6 mi | |
| Boise Holcomb Water Users Assoc. INC |
36 | 1 | 19.9 mi | |
| Scenic Properties Water Assn INC |
40 | 1 | 20.1 mi | |
| Wilderness Ranch Owners Association INC |
525 | 3 | 21.6 mi | |
| Mores Creek Rim Ranch Water Dist |
140 | 1 | 21.6 mi | |
| Mountain Shadows HOA Inc. |
89 | 0 | 24.1 mi | |
| Ranch Subd |
65 | 3 | 24.5 mi | |
| Rivers Point Property Owners Assn |
140 | 0 | 24.7 mi | |
| Mountain View Water and Road Assn |
305 | 3 | 24.9 mi | |
| Terrace Lakes Water Company |
475 | 6 | 26.0 mi | |
| Castle Mountain Creeks Owners Assn |
250 | 2 | 26.8 mi | |
| Horseshoe Bend Water Supply |
750 | 2 | 27.9 mi | |
| Scriver Woods Homeowners Assn |
160 | 0 | — | |
| Valley HI Estates |
140 | 1 | — | |
| Horseshu Vue Ranch Subd |
51 | 3 | — | |
| Shilo Ranch Estates |
44 | 1 | — | |
| Southfork Landing INC |
25 | 1 | — |
Non-community systems in Boise County (36: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Boise County, the county this ZIP code lies in, nearest to the ZIP code's centre first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system.
ZIP code areas and town boundaries come from the U.S. Census Bureau's 2020 ZCTA files.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Idaho records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.