State rankings

North Dakota water-system rankings

Community water systems in North Dakota ranked by PurityRadar safety score — from EPA violations, enforcement, and PFAS data.

Lowest-scoring systems in North Dakota

Ranked lowest score first. Population shown for context.

1 STANDING ROCK RURAL WATER SYSTEM FORT YATES, ND · ~6,839 served 85 2 NORTHWESTERN AREA WATER SUPPLY BISMARCK, ND 100 3 WESTERN AREA WATER SUPPLY AUTHORITY WILLISTON, ND 100 4 FARGO CITY OF FARGO, ND · ~120,762 served 100 5 BISMARCK CITY OF BISMARCK, ND · ~72,417 served 100 6 GRAND FORKS REGIONAL WTP GRAND FORKS, ND · ~57,339 served 100 7 MINOT CITY OF MINOT, ND · ~48,743 served 100 8 WEST FARGO CITY OF WEST FARGO, ND · ~34,858 served 100 9 WILLISTON CITY OF WILLISTON, ND · ~26,426 served 100 10 DICKINSON CITY OF DICKINSON, ND · ~25,679 served 100 11 MANDAN CITY OF MANDAN, ND · ~21,769 served 100 12 JAMESTOWN CITY OF JAMESTOWN, ND · ~15,427 served 100 13 BELCOURT-TURTLE MTN RURAL WATER SYSTEM BELCOURT, ND · ~13,500 served 100 14 SOUTH CENTRAL RWD NORTH BURLEIGH BISMARCK, ND · ~10,400 served 100 15 SOUTHWEST WATER AUTHORITY DICKINSON, ND · ~8,537 served 100 16 WAHPETON CITY OF WAHPETON, ND · ~7,766 served 100 17 NORTH PRAIRIE RWD-SYSTEM 1&2 MINOT, ND · ~7,748 served 100 18 DEVILS LAKE CITY OF DEVILS LAKE, ND · ~7,141 served 100 19 VALLEY CITY CITY OF VALLEY CITY, ND · ~6,585 served 100 20 WATFORD CITY CITY OF WATFORD CITY, ND · ~6,390 served 100 21 EAST CENTRAL REGIONAL WD-GF THOMPSON, ND · ~5,995 served 100 22 STUTSMAN RURAL WATER DISTRICT JAMESTOWN, ND · ~5,550 served 100 23 GREATER RAMSEY WATER DISTRICT DEVILS LAKE, ND · ~5,280 served 100 24 NORTHWEST RURAL WATER DISTRICT WILLISTON, ND · ~5,102 served 100 25 BARNES RURAL WATER DISTRICT VALLEY CITY, ND · ~4,938 served 100

Highest-scoring large systems in North Dakota

Systems serving 10,000+ people with the best scores.

1 FARGO CITY OF FARGO, ND · ~120,762 served 100 2 BISMARCK CITY OF BISMARCK, ND · ~72,417 served 100 3 GRAND FORKS REGIONAL WTP GRAND FORKS, ND · ~57,339 served 100 4 MINOT CITY OF MINOT, ND · ~48,743 served 100 5 WEST FARGO CITY OF WEST FARGO, ND · ~34,858 served 100 6 WILLISTON CITY OF WILLISTON, ND · ~26,426 served 100 7 DICKINSON CITY OF DICKINSON, ND · ~25,679 served 100 8 MANDAN CITY OF MANDAN, ND · ~21,769 served 100

North Dakota directory → All states

Scores reflect EPA public records (violations, enforcement, PFAS), are system-level, and can’t account for your home’s plumbing. See the methodology.