County · North Dakota
McLean County, North Dakota: drinking water records
This overview covers 13 ZIP codes and 12 community water systems in McLean County. It also stands in for 0 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Max City of ND2800619 | 334 | 0 | 0 | 2 | 0 ppb |
| Garrison Rural Water District ND2801430 | 1,805 | 0 | 0 | 0 | 0 ppb |
| Mclean-Sheridan Water District-System 1 ND2801400 | 1,800 | 0 | 0 | 0 | 1.1 ppb |
| Garrison City of ND2800389 | 1,453 | 0 | 0 | 0 | 2.1 ppb |
| Washburn City of ND2800989 | 1,246 | 0 | 0 | 0 | 5.1 ppb |
| Underwood City of ND2800953 | 778 | 0 | 0 | 0 | 2.6 ppb |
| Turtle Lake City of ND2800949 | 581 | 0 | 0 | 0 | 4.2 ppb |
| Mclean-Sheridan Water District-System 3 ND2801487 | 400 | 0 | 0 | 0 | 2.2 ppb |
| Mclean-Sheridan Water District-System 2 ND2801696 | 390 | 0 | 0 | 0 | 0.8 ppb |
| Riverdale City of ND2800825 | 205 | 0 | 0 | 0 | 1.2 ppb |
| Mercer City of ND2800650 | 94 | 0 | 0 | 0 | 0 ppb |
| Coleharbor City of ND2800194 | 79 | 0 | 0 | 0 | 3.6 ppb |
ZIP reports in McLean County
No ZIP report in this county is published yet.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.