Water quality for ZIP code 59404
ZIP 59404 covers Great Falls, Sun Prairie, Ulm, and Vaughn in Cascade County, Montana, one of 15 ZIP codes in the county. 97 active public water systems serve the county; 63 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Cascade County
46 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Windy Acres Wua Black Eagle |
50 | 0 | 5.3 mi | |
| Black Eagle Cascade County Water Sewer Black Eagle |
1,233 | 0 | 7.7 mi | |
| Prairie Water Company Great Falls |
1,000 | 3 | 8.3 mi | |
| Countryside Village MHP Grt Fls Great Falls |
600 | 0 | 9.0 mi | |
| Bushard Water Company Great Falls |
425 | 3 | 9.0 mi | |
| Pleasant Park Community INC Great Falls |
125 | 3 | 9.0 mi | |
| Shade Tree Mobile Park Great Falls |
100 | 1 | 9.0 mi | |
| Rivershore Community LLC Great Falls |
90 | 0 | 9.0 mi | |
| Big Stack Estates Great Falls |
60 | 1 | 9.0 mi | |
| The Falls Mobile Home Community Great Falls |
60 | 0 | 9.0 mi | |
| Cobblestone Court Great Falls |
50 | 0 | 9.0 mi | |
| Park Garden Estates Great Falls |
50 | 1 | 9.0 mi | |
| Sunset Boulder MHP LLC Great Falls |
45 | 1 | 9.0 mi | |
| High Plains H2o LLC Great Falls |
25 | 0 | 9.0 mi | |
| Great Falls City of Great Falls |
60,000 | 0 | 9.1 mi | |
| Highwood Mobile Home Park Great Falls |
400 | 1 | 9.2 mi | |
| Great Falls RV Park Great Falls |
274 | 0 | 9.8 mi | |
| Rivers Edge Mobile Home Park Grt Fls Great Falls |
75 | 1 | 9.8 mi | |
| Sun Prairie Village County Great Falls |
1,800 | 1 | 9.9 mi | |
| Grandview Trailer Court Great Falls |
165 | 0 | 10.0 mi | |
| Malmstrom Air Force Base Great Falls |
8,850 | 3 | 10.2 mi | |
| Big Sky Mobile Home Park Great Falls |
40 | 0 | 10.7 mi | |
| Sun Prairie Water District Great Falls |
350 | 5 | 10.7 mi | |
| Missouri Meadows Community INC Great Falls |
85 | 1 | 11.2 mi | |
| Red Sky Mobile Home Community Vaughn |
80 | 1 | 11.3 mi |
Non-community systems in Cascade County (50: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Cascade County, the county this ZIP code lies in, nearest to the ZIP code's centre first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system or, for systems without one, to the centre of the first town EPA lists the system as serving, from Census Bureau place files.
ZIP code areas and town boundaries come from the U.S. Census Bureau's 2020 ZCTA files.
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.