207 active public water systems serve 147,480 people in Gallatin County. 106 are compliant, 101 had at least one EPA violation in the past three years, 2 are designated serious violators, and 6 carry a health flag.
Active systems20764 community systems
People served147Kby public water systems
Systems with violations10149% of active systems, past 3 years
Serious violators26 systems carry a health flag
Needs attention
Elkhorn RanchMT0001830 · Gallatin Gateway · Transient non-community system · Serves 654 rules violated in the past three years. Unresolved: Surface Water Treatment Rule and Public Notice Rule and Revised PN Rule.
Firehole Guest RanchMT0002735 · West Yellowstone · Transient non-community system · Serves 401 rule violated in the past three years. Unresolved: Revised Total Coliform Rule.
MT Ellis AcademyMT0001262 · Bozeman · Community water system · Serves 1062 rules violated in the past three years. Unresolved: Revised Total Coliform Rule.
Park 168 Bar & 520 HotelMT0003502 · West Yellowstone · Transient non-community system · Serves 661 rule violated in the past three years. Unresolved: Revised Total Coliform Rule.
Montana Mountain Riders LLCMT0003998 · West Yellowstone · Transient non-community system · Serves 432 rules violated in the past three years. Unresolved: Revised Total Coliform Rule.
Fairy Lake CampgroundMT0062479 · Bozeman · Transient non-community system · Serves 301 rule violated in the past three years. Unresolved: Revised Total Coliform 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. Retrieved from ECHO on Oct 11, 2026.
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.