North Dakota Water Systems
318 community water systems in North Dakota, ranked by violation count. Data from EPA Safe Drinking Water Information System (SDWIS).
North Dakota operates 318 community water systems regulated by the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act. Together these utilities serve an estimated 743,065 residents, each filing compliance results with the state's primacy agency and, for federally listed contaminants, with the U.S. Environmental Protection Agency.
Across the state, SDWIS records contain 169 total violations, of which 55 systems carry at least one active health-based violation, a Maximum Contaminant Level (MCL) exceedance or treatment-technique failure. That represents roughly 17% of North Dakota systems.
Violation counts reflect both infrastructure realities and reporting diligence, a state with more small rural systems will accumulate more monitoring-type violations without necessarily delivering worse water. Health-based violations are the stronger safety signal. A past violation does not itself indicate current unsafe water; utilities must notify customers, remediate, and publish an annual Consumer Confidence Report. All numbers below draw directly from the federal SDWIS record.
Which water systems have violations? (55)
| # | System Name | Violations | Health |
|---|---|---|---|
| 1 | MAXBASS CITY OF Maxbass | 20 | Yes |
| 2 | WHITE SHIELD WATER TREATMENT PLANT New Town | 18 | Yes |
| 3 | TWIN BUTTES WATER PLANT New Town | 11 | Yes |
| 4 | PARSHALL, CITY OF Parshall | 9 | Yes |
| 5 | MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 2 Turtle Lake | 8 | Yes |
| 6 | SPIRIT LAKE WATER MANAGEMENT RWS St. Michael | 6 | Yes |
| 7 | FOUR BEARS WATER SYSTEM New Town | 6 | Yes |
| 8 | SUNDALE HUTTERIAN ASSOCIATION Milnor | 5 | Yes |
| 9 | CATHAY CITY OF Cathay | 5 | Yes |
| 10 | OBERON CITY OF Oberon | 4 | Yes |
| 11 | GOODRICH CITY OF Goodrich | 4 | Yes |
| 12 | FLAXTON CITY OF Flaxton | 4 | Yes |
| 13 | SOURIS CITY OF Souris | 4 | Yes |
| 14 | RAINBOW ESTATES Bismarck | 4 | Yes |
| 15 | ELLENDALE CITY OF Ellendale | 3 | Yes |
| 16 | PARSHALL-LUCKY MOUND New Town | 3 | Yes |
| 17 | HARWOOD CITY OF Harwood | 3 | Yes |
| 18 | FARGO CITY OF Fargo | 2 | Yes |
| 19 | BELCOURT-TURTLE MTN RURAL WATER SYSTEM Belcourt | 2 | Yes |
| 20 | LINCOLN CITY OF Lincoln | 2 | Yes |
| 21 | DAKOTA MAGIC CASINO Hankinson | 2 | Yes |
| 22 | DRAYTON CITY OF Drayton | 2 | Yes |
| 23 | TOWNER CITY OF Towner | 2 | Yes |
| 24 | DAVENPORT CITY OF Davenport | 2 | Yes |
| 25 | ZAP CITY OF Zap | 2 | Yes |
| 26 | KENSAL CITY OF Kensal | 2 | Yes |
| 27 | WILLOWBANK COLONY Edgeley | 2 | Yes |
| 28 | SOLEN, CITY OF Solen | 2 | Yes |
| 29 | NEW HRADEC WATERWORKS New Hradec | 2 | Yes |
| 30 | WOODWORTH CITY OF Woodworth | 2 | Yes |
| 31 | ROBINSON CITY OF Robinson | 2 | Yes |
| 32 | STANDING ROCK RURAL WATER SYSTEM Fort Yates | 1 | Yes |
| 33 | BOTTINEAU CITY OF Bottineau | 1 | Yes |
| 34 | ALEXANDER CITY OF Alexander | 1 | Yes |
| 35 | NORTHWOOD CITY OF Northwood | 1 | Yes |
| 36 | HANKINSON CITY OF Hankinson | 1 | Yes |
| 37 | UNDERWOOD CITY OF Underwood | 1 | Yes |
| 38 | DUNSEITH CITY OF Dunseith | 1 | Yes |
| 39 | NEW ENGLAND CITY OF New England | 1 | Yes |
| 40 | ARGUSVILLE CITY OF Argusville | 1 | Yes |
| 41 | STRASBURG CITY OF Strasburg | 1 | Yes |
| 42 | MADDOCK CITY OF Maddock | 1 | Yes |
| 43 | STANTON CITY OF Stanton | 1 | Yes |
| 44 | SAWYER CITY OF Sawyer | 1 | Yes |
| 45 | LANSFORD CITY OF Lansford | 1 | Yes |
| 46 | PRAIRIE VIEW HOA Williston | 1 | Yes |
| 47 | RUTLAND CITY OF Rutland | 1 | Yes |
| 48 | REEDER CITY OF Reeder | 1 | Yes |
| 49 | DAKOTA ADVENTIST ACADEMY Bismarck | 1 | Yes |
| 50 | LEHR CITY OF Lehr | 1 | Yes |
| 51 | NOME CITY OF Nome | 1 | Yes |
| 52 | FORBES CITY OF Forbes | 1 | Yes |
| 53 | COUNTRY ACRES WATER CO Horace | 1 | Yes |
| 54 | FORTUNA CITY OF Fortuna | 1 | Yes |
| 55 | WATFORD RESIDENCE SUITES Watford City | 1 | Yes |
Systems with No Violations (263)
263 water systems in North Dakota have zero recorded violations. Showing the 50 largest by population served.
All Water Systems in North Dakota (318)
Page 1 of 7, ordered by population served.
Frequently Asked Questions
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About This Data
Water system data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations that may pose a direct risk to public health. Only community water systems (CWS) are included.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.