Idaho
Twin Falls County drinking water quality
56 active public water systems serve 76,266 people in Twin Falls County. 12 are compliant, 44 had at least one EPA violation in the past three years, 7 are designated serious violators, and 3 carry a health flag.
Needs attention
Community water systems
14 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Twin Falls City of |
56,121 | 5 | 0 | |
|
Kimberly City of |
5,359 | 1 | 0 | |
|
Buhl City of |
4,518 | 3 | 0 | |
|
Filer Water Works |
2,858 | 2 | 0 | |
|
Hansen City of |
1,200 | 3 | 3 | |
|
Castleford City of |
275 | 1 | 1 | |
|
Kanaka Rapids Ranch Water System INC |
240 | 5 | 1 | |
|
Hollister City of |
220 | 4 | 0 | |
|
Rock Ledge Estates |
150 | 1 | 1 | |
|
Meander Point Subd |
140 | 3 | 1 | |
|
Murtaugh City of |
130 | 4 | 1 | |
|
Countryside Village |
108 | 4 | 1 | |
|
Rogerson Water Dist |
75 | 0 | 0 | |
|
Sportsmans River Resort |
50 | 0 | 0 |
Non-community systems (42: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
Inactive systems (65, 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.