Water quality for ZIP code 59420
ZIP 59420 covers Carter and Twin Hills Colony in Chouteau County, Montana, one of 7 ZIP codes in the county. 12 active public water systems serve the county; 9 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Chouteau County
10 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Carter Chouteau CO Water Dist Carter |
150 | 2 | 8.6 mi | |
| Fort Benton City of Fort Benton |
1,500 | 0 | 15.9 mi | |
| Hawarden Square Butte Water Fort Benton |
50 | 2 | 16.5 mi | |
| Highwood County Water and Sewer District Highwood |
280 | 2 | 22.1 mi | |
| South Chouteau County Water Dist Highwood |
80 | 5 | 22.1 mi | |
| Loma County Water District Loma |
200 | 0 | 23.9 mi | |
| North Geraldine Water System Geraldine |
50 | 1 | 39.0 mi | |
| Geraldine Town of Geraldine |
260 | 1 | 39.2 mi | |
| Sunny Brook Colony Chester |
80 | 0 | 43.8 mi | |
| Big Sandy Town of Big Sandy |
608 | 2 | 46.1 mi |
Non-community systems in Chouteau County (1: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Coal Banks Landing Blm Lewistown |
120 | 2 | 0 |
About this data
Water systems are matched to Chouteau 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.