County · North Dakota
Mercer County, North Dakota: drinking water records
This overview covers 5 ZIP codes and 7 community water systems in Mercer 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 |
|---|---|---|---|---|---|
| Omnd Water Treatment Plant ND2901491 | 4,168 | 120 | 0 | 0 | 0 ppb |
| Beulah City of ND2900074 | 3,058 | 60 | 0 | 0 | 0 ppb |
| Zap City of ND2901054 | 237 | 0 | 0 | 2 | 3.0 ppb |
| Hazen City of ND2900470 | 2,411 | 0 | 0 | 0 | 4.1 ppb |
| Stanton City of ND2900902 | 366 | 0 | 0 | 0 | 1.5 ppb |
| Golden Valley City of ND2900402 | 182 | 0 | 0 | 0 | 0.8 ppb |
| Pick City City of ND2900789 | 123 | 0 | 0 | 0 | 0.5 ppb |
ZIP reports in Mercer 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.