245 active public water systems serve 140,358 people in Missoula County. 157 are compliant, 88 had at least one EPA violation in the past three years, 0 are designated serious violators, and 5 carry a health flag.
Active systems24585 community systems
People served140Kby public water systems
Systems with violations8836% of active systems, past 3 years
Serious violators05 systems carry a health flag
Needs attention
Wheat Montana at Muralts Travel PlazaMT0000847 · Missoula · Non-Transient non-community system · Serves 1,2252 rules violated in the past three years. Unresolved: Revised Total Coliform Rule and Lead and Copper Rule.
Westview Mobile Home ParkMT0000437 · Missoula · Community water system · Serves 9472 rules violated in the past three years. Unresolved: Lead and Copper Rule.
Spring Meadows County Water DistrictMT0003630 · Missoula · Community water system · Serves 1621 rule violated in the past three years. Unresolved: Lead and Copper Rule.
Outdoorsmen ChurchMT0005126 · Missoula · Transient non-community system · Serves 1001 rule violated in the past three years. Unresolved: Revised Total Coliform Rule.
East View Acres Water SystemMT0003565 · Missoula · Community water system · Serves 252 rules violated in the past three years. Unresolved: Ground Water Rule.
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.
Compliant
Compliant
No violations reported to EPA in the past three years.
At least one violation on record with EPA in the past three years. Many are monitoring or reporting lapses rather than contamination; the system page lists which rules were involved and whether each is still open.
EPA's designation, also called an enforcement priority, for a system with unresolved serious, multiple, or continuing violations. EPA expects the system and its state to act quickly to resolve them.
At least one open health-based violation: an exceedance of a maximum contaminant level or residual disinfectant level, or a treatment technique violation. Monitoring and reporting lapses do not raise this flag.