Water quality for ZIP code 58554
ZIP 58554 covers Mandan and Harmon in Morton County, North Dakota, one of 8 ZIP codes in the county. 13 active public water systems serve the county; 4 had an EPA violation in the past three years.
Most likely your provider
Your location is within the outer bounds of this system's EPA service area.
Other community water systems in Morton County
11 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Mandan City of Mandan |
21,769 | 0 | 6.3 mi | |
| Riverview Heights Mandan |
200 | 3 | 6.4 mi | |
| Crown Butte Coop |
320 | 0 | 10.7 mi | |
| New Salem City of New Salem |
946 | 0 | 23.7 mi | |
| Flasher City of Flasher |
232 | 0 | 24.3 mi | |
| Almont City of Almont |
122 | 5 | 27.1 mi | |
| Glen Ullin City of Glen Ullin |
807 | 0 | 42.6 mi | |
| Hebron City of Hebron |
747 | 2 | 51.3 mi | |
| Southwest Wa-Junction Inn(missouri West) |
173 | 0 | 92.0 mi | |
| Southwest Wa-Tower Hill (missouri West) |
43 | 0 | — | |
| Southwest Wa-Crown Butte(missouri West) |
34 | 0 | — |
Non-community systems in Morton County (1: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Glen Ullin Dollar General Glen Ullin |
25 | 1 | 0 |
About this data
Water systems are matched to Morton 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 North Dakota 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.