Montana
Sanders County drinking water quality
44 active public water systems serve 9,595 people in Sanders County. 25 are compliant, 19 had at least one EPA violation in the past three years, 0 are designated serious violators, and 0 carry a health flag.
Community water systems
12 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Thompson Falls City of Thompson Falls |
1,950 | 0 | 0 | |
|
Plains Town of Plains |
1,700 | 1 | 0 | |
|
Hot Springs Municipal Water Hot Springs |
982 | 1 | 0 | |
|
Water Service INC Trout Creek Trout Creek |
350 | 0 | 0 | |
|
Noxon Water District Noxon |
330 | 0 | 0 | |
|
Salish Shores Trade Winds Comm Village Thompson Falls |
215 | 1 | 0 | |
|
Paradise Water District Paradise |
200 | 0 | 0 | |
|
Woodside Park County Water and Sewer Dis Thompson Falls |
115 | 1 | 0 | |
|
Heron Community Water System Heron |
84 | 1 | 0 | |
|
Clear View Academy Heron |
70 | 0 | 0 | |
|
North Shore Estates HOA Thompson Falls |
65 | 0 | 0 | |
|
Avista Utilities Noxon Rapids Dam Noxon |
43 | 0 | 0 |
Non-community systems (32: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
Inactive systems (45, 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 Montana 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.