Idaho
Boise County drinking water quality
56 active public water systems serve 7,406 people in Boise County. 13 are compliant, 43 had at least one EPA violation in the past three years, 2 are designated serious violators, and 1 carries a health flag.
Needs attention
Community water systems
20 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Horseshoe Bend Water Supply |
750 | 2 | 1 | |
|
Idaho City Water Dept |
531 | 1 | 1 | |
|
Wilderness Ranch Owners Association INC |
525 | 3 | 1 | |
|
Terrace Lakes Water Company |
475 | 6 | 1 | |
|
Mountain View Water and Road Assn |
305 | 3 | 2 | |
|
Castle Mountain Creeks Owners Assn |
250 | 2 | 0 | |
|
Duquette Pines Homeowners Association |
163 | 1 | 1 | |
|
Scriver Woods Homeowners Assn |
160 | 0 | 0 | |
|
Mores Creek Rim Ranch Water Dist |
140 | 1 | 1 | |
|
Rivers Point Property Owners Assn |
140 | 0 | 0 | |
|
Valley HI Estates |
140 | 1 | 0 | |
|
Osprey |
100 | 3 | 0 | |
|
Mountain Shadows HOA Inc. |
89 | 0 | 0 | |
|
Garden Valley Ranchettes Homeowners |
78 | 1 | 1 | |
|
Ranch Subd |
65 | 3 | 0 | |
|
Horseshu Vue Ranch Subd |
51 | 3 | 2 | |
|
Shilo Ranch Estates |
44 | 1 | 0 | |
|
Scenic Properties Water Assn INC |
40 | 1 | 1 | |
|
Boise Holcomb Water Users Assoc. INC |
36 | 1 | 1 | |
|
Southfork Landing INC |
25 | 1 | 0 |
Non-community systems (36: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
Inactive systems (64, no longer operating or reporting)
Kept for the record and excluded from the county totals above. Browse inactive systems.
About this data
Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.
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.