Water quality for ZIP code 58531
ZIP 58531 covers Riverdale and Coleharbor in McLean County, North Dakota, one of 13 ZIP codes in the county. 13 active public water systems serve the county; 5 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 McLean County
11 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Coleharbor City of Coleharbor |
79 | 3 | 1.7 mi | |
| Underwood City of Underwood |
778 | 1 | 7.7 mi | |
| Riverdale City of Riverdale |
205 | 0 | 9.3 mi | |
| Garrison City of Garrison |
1,453 | 1 | 12.2 mi | |
| Turtle Lake City of Turtle Lake |
581 | 0 | 14.4 mi | |
| McLean-Sheridan Water District-System 1 |
1,800 | 0 | 15.1 mi | |
| Max City of Max |
334 | 3 | 18.8 mi | |
| Washburn City of Washburn |
1,246 | 0 | 20.1 mi | |
| Mercer City of Mercer |
94 | 5 | 23.1 mi | |
| McLean-Sheridan Water District-System 3 |
400 | 0 | — | |
| McLean-Sheridan Water District-System 2 |
390 | 0 | — |
Non-community systems in McLean County (1: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Rainbow Energy Center |
532 | 0 | 0 |
About this data
Water systems are matched to McLean 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.
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.