County · North Dakota
Traill County, North Dakota: drinking water records
This overview covers 9 ZIP codes and 5 community water systems in Traill 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 |
|---|---|---|---|---|---|
| East Central Regional Wd-Traill ND4901071 | 2,800 | 0 | 0 | 0 | 0 ppb |
| Mayville City of ND4900622 | 1,858 | 0 | 0 | 0 | 2.7 ppb |
| Hillsboro City of ND4900482 | 1,603 | 0 | 0 | 0 | 2.1 ppb |
| Hatton City of ND4900465 | 777 | 0 | 0 | 0 | 1.2 ppb |
| Portland City of ND4900803 | 606 | 0 | 0 | 0 | 1.1 ppb |
ZIP reports in Traill 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.