All 36 systems had complete monitoring. 0 reached at least one study comparison level; 36 did not. “Study comparison level” means the dated EPA technical cutoff used in this January 2026 research release. It does not determine household exposure, health risk, or current legal compliance.
Find your water system
ZIP codes are used only to route visitors to public water systems that reported serving them. Confirm the actual provider using a water bill or utility record.
System counts in North Dakota
Each count shows how many included water systems reached the named study level.
| Study comparison | Systems reaching level | Water systems included | Percent |
|---|---|---|---|
| PFOA: study level 4.05 ppt (April 2024 EPA level: 4 ppt) | 0 | 36 | 0.0% |
| PFOS: study level 4.05 ppt (April 2024 EPA level: 4 ppt) | 0 | 36 | 0.0% |
| PFHxS: study level 15 ppt (April 2024 EPA level: 10 ppt) | 0 | 36 | 0.0% |
| PFNA: study level 15 ppt (April 2024 EPA level: 10 ppt) | 0 | 36 | 0.0% |
| HFPO-DA: study level 15 ppt (April 2024 EPA level: 10 ppt) | 0 | 36 | 0.0% |
| Hazard Index: study level 1.5 with at least two detected components (April 2024 EPA level: 1) | 0 | 36 | 0.0% |
Community water systems with complete monitoring
Each PWSID appears once, preventing double counting across ZIP associations.
| Public water system | PWSID | Population served | Primary source | Sampling locations | Study comparison |
|---|---|---|---|---|---|
| AGASSIZ WATER USERS DISTRICT | ND1801056 | 3,438 | Ground water | 1 | Below the study levels |
| BARNES RURAL WATER DISTRICT | ND0201058 | 4,938 | Ground water | 1 | Below the study levels |
| BEACH CITY OF | ND1700059 | 981 | Surface water purchased | 1 | Below the study levels |
| BELCOURT-TURTLE MTN RURAL WATER SYSTEM | 083890023 | 13,500 | Ground water | 1 | Below the study levels |
| BEULAH CITY OF | ND2900074 | 3,058 | Ground water | 1 | Below the study levels |
| CASS RURAL WATER DISTRICT FARGO | ND0901483 | 4,242 | Surface water purchased | 1 | Below the study levels |
| CASS RURAL WATER DISTRICT-PHASE I | ND0901060 | 3,658 | Ground water | 1 | Below the study levels |
| CASS RURAL WATER DISTRICT-PHASE II | ND0901124 | 1,700 | Ground water | 1 | Below the study levels |
| CENTRAL PLAINS WATER DISTRICT | ND5201309 | 3,504 | Ground water | 1 | Below the study levels |
| DEVILS LAKE CITY OF | ND3600231 | 7,141 | Ground water | 1 | Below the study levels |
| DICKINSON CITY OF | ND4500242 | 25,679 | Surface water purchased | 1 | Below the study levels |
| EAST CENTRAL REGIONAL WD-GF | ND1801062 | 5,995 | Ground water | 1 | Below the study levels |
| FARGO CITY OF | ND0900336 | 120,762 | Surface water | 1 | Below the study levels |
| GRAFTON CITY OF | ND5000408 | 4,284 | Surface water | 1 | Below the study levels |
| GRAND FORKS REGIONAL WTP | ND1800410 | 57,339 | Surface water | 1 | Below the study levels |
| GREATER RAMSEY WATER DISTRICT | ND3601424 | 5,280 | Ground water | 1 | Below the study levels |
| GRENORA CITY OF | ND5300425 | 244 | Ground water | 1 | Below the study levels |
| JAMESTOWN CITY OF | ND4700498 | 15,427 | Ground water | 1 | Below the study levels |
| LARIMORE CITY OF | ND1800550 | 1,346 | Ground water purchased | 1 | Below the study levels |
| MANDAN CITY OF | ND3000596 | 21,769 | Surface water | 1 | Below the study levels |
| MINOT CITY OF | ND5100660 | 48,743 | Ground water | 1 | Below the study levels |
| MISSOURI WEST WATER SYSTEM | ND3001431 | 4,303 | Surface water purchased | 2 | Below the study levels |
| NORTH PRAIRIE RWD-SYSTEM 1&2 | ND5101125 | 7,748 | Ground water purchased | 1 | Below the study levels |
| NORTHEAST RWD- NORTH VALLEY BRANCH | ND3401128 | 3,422 | Ground water | 1 | Below the study levels |
| NORTHWEST RURAL WATER DISTRICT, ND | ND5301079 | 5,102 | Surface water purchased | 1 | Below the study levels |
| OMND WATER TREATMENT PLANT | ND2901491 | 4,168 | Surface water | 1 | Below the study levels |
| SOUTH CENTRAL REGIONAL WATER DISTRICT | ND0801154 | 3,700 | Purchased ground water under influence of surface water source | 1 | Below the study levels |
| SOUTH CENTRAL RWD NORTH BURLEIGH | ND0801502 | 10,400 | Groundwater under influence of surface water | 1 | Below the study levels |
| SOUTH CENTRAL RWD-EMMONS | ND1501653 | 3,650 | Surface water | 1 | Below the study levels |
| SOUTHEAST WUD (EAST) | ND3901068 | 4,225 | Ground water | 1 | Below the study levels |
| SOUTHWEST WATER AUTHORITY | ND4501434 | 8,537 | Surface water | 1 | Below the study levels |
| STUTSMAN RURAL WATER DISTRICT | ND4701303 | 5,550 | Ground water | 1 | Below the study levels |
| VALLEY CITY CITY OF | ND0200958 | 6,585 | Surface water | 1 | Below the study levels |
| WATFORD CITY CITY OF | ND2700990 | 6,390 | Surface water purchased | 1 | Below the study levels |
| WEST FARGO CITY OF | ND0900999 | 34,858 | Surface water purchased | 1 | Below the study levels |
| WILLISTON CITY OF | ND5301012 | 26,426 | Surface water | 1 | Below the study levels |
What is included
Each active community water system with complete monitoring is counted once, even if it is linked with several ZIP codes. Private wells are excluded, and UCMR 5 did not comprehensively monitor every small system. This page does not apply North Dakota's state-specific standards or determine compliance. Use the official state or territory drinking-water program for current regulatory information.