North Dakota Tap Water Quality: Is It Safe to Drink?

2026 EPA water quality data for 303 community water systems serving a combined 706,282 people in North Dakota. Find your water system to see violations, PFAS results, lead testing, and a safety grade — free.

North Dakota relies on surface water from the Missouri River system and groundwater from glacial aquifers. Water is extremely hard across most of the state, with many areas exceeding 300 mg/L. Naturally occurring arsenic and uranium have been detected in some aquifers in the western oil-producing region.

Find Your Water System in North Dakota

Enter your ZIP code to see EPA violations, lead test results, PFAS data, and a safety grade for your water.

📊 Data from EPA’s SDWIS · 🔄 Updated quarterly · 🏛️ 303 water systems in North Dakota

Showing the 250 largest of 303 community water systems in North Dakota, by population served. Use the ZIP search above or the city links to find a smaller system.

FARGO CITY OF FARGO, ND · 120,762 people · Surface Water BISMARCK CITY OF BISMARCK, ND · 72,417 people · GWUDI GRAND FORKS REGIONAL WTP GRAND FORKS, ND · 57,339 people · Surface Water MINOT CITY OF MINOT, ND · 48,743 people · Groundwater WEST FARGO CITY OF WEST FARGO, ND · 34,858 people · Surface Water Purchased WILLISTON CITY OF WILLISTON, ND · 26,426 people · Surface Water DICKINSON CITY OF DICKINSON, ND · 25,679 people · Surface Water Purchased MANDAN CITY OF MANDAN, ND · 21,769 people · Surface Water JAMESTOWN CITY OF JAMESTOWN, ND · 15,427 people · Groundwater SOUTH CENTRAL RWD NORTH BURLEIGH BISMARCK, ND · 10,400 people · GWUDI SOUTHWEST WATER AUTHORITY DICKINSON, ND · 8,537 people · Surface Water WAHPETON CITY OF WAHPETON, ND · 7,766 people · Groundwater NORTH PRAIRIE RWD-SYSTEM 1&2 MINOT, ND · 7,748 people · Groundwater Purchased DEVILS LAKE CITY OF DEVILS LAKE, ND · 7,141 people · Groundwater VALLEY CITY CITY OF VALLEY CITY, ND · 6,585 people · Surface Water WATFORD CITY CITY OF WATFORD CITY, ND · 6,390 people · Surface Water Purchased EAST CENTRAL REGIONAL WD-GF THOMPSON, ND · 5,995 people · Groundwater STUTSMAN RURAL WATER DISTRICT JAMESTOWN, ND · 5,550 people · Groundwater GREATER RAMSEY WATER DISTRICT DEVILS LAKE, ND · 5,280 people · Groundwater NORTHWEST RURAL WATER DISTRICT WILLISTON, ND · 5,102 people · Surface Water Purchased BARNES RURAL WATER DISTRICT VALLEY CITY, ND · 4,938 people · Groundwater MISSOURI WEST WATER SYSTEM MANDAN, ND · 4,303 people · Surface Water Purchased GRAFTON CITY OF GRAFTON, ND · 4,284 people · Surface Water LINCOLN CITY OF LINCOLN, ND · 4,257 people CASS RURAL WATER DISTRICT FARGO KINDRED, ND · 4,242 people · Surface Water Purchased SOUTHEAST WUD (EAST) MANTADOR, ND · 4,225 people · Groundwater OMND WATER TREATMENT PLANT DICKINSON, ND · 4,168 people · Surface Water MCKENZIE COUNTY WRD WATFORD CITY, ND · 3,895 people · Surface Water Purchased SOUTH CENTRAL REGIONAL WATER DISTRICT BISMARCK, ND · 3,700 people CASS RURAL WATER DISTRICT-PHASE I KINDRED, ND · 3,658 people · Groundwater SOUTH CENTRAL RWD-EMMONS BISMARCK, ND · 3,650 people · Surface Water CENTRAL PLAINS WATER DISTRICT FESSENDEN, ND · 3,504 people · Groundwater AGASSIZ WATER USERS DISTRICT GILBY, ND · 3,438 people · Groundwater NORTHEAST RWD- NORTH VALLEY BRANCH CAVALIER, ND · 3,422 people · Groundwater BEULAH CITY OF BEULAH, ND · 3,058 people · Groundwater WALSH RURAL WATER DISTRICT GRAFTON, ND · 3,000 people · Groundwater Purchased RUGBY CITY OF RUGBY, ND · 2,876 people · Groundwater EAST CENTRAL REGIONAL WD-TRAILL THOMPSON, ND · 2,800 people · Groundwater NORTH PRAIRIE RWD-SYSTEM III MINOT, ND · 2,742 people · Groundwater CASSELTON CITY OF CASSELTON, ND · 2,513 people · Groundwater Purchased TRI-COUNTY WATER DISTRICT PETERSBURG, ND · 2,501 people · Groundwater NORTHEAST RWD-LANGDON BRANCH CAVALIER, ND · 2,450 people · Groundwater Purchased HAZEN CITY OF HAZEN, ND · 2,411 people · Surface Water Purchased BOTTINEAU CITY OF BOTTINEAU, ND · 2,211 people · Groundwater Purchased TIOGA CITY OF TIOGA, ND · 2,202 people · Surface Water Purchased LISBON CITY OF LISBON, ND · 2,154 people · Groundwater CARRINGTON CITY OF CARRINGTON, ND · 2,065 people · Groundwater LANGDON CITY OF LANGDON, ND · 1,878 people · Groundwater Purchased MAYVILLE CITY OF MAYVILLE, ND · 1,858 people · Groundwater Purchased OAKES CITY OF OAKES, ND · 1,856 people · Groundwater GARRISON RURAL WATER DISTRICT GARRISON, ND · 1,805 people · Surface Water Purchased MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 1 TURTLE LAKE, ND · 1,800 people · Groundwater HARVEY CITY OF HARVEY, ND · 1,783 people · Groundwater CASS RURAL WATER DISTRICT-PHASE II KINDRED, ND · 1,700 people · Groundwater CASS RURAL WATER DISTRICT-PHASE III KINDRED, ND · 1,682 people · Groundwater SOUTHEAST WUD (CENTRAL-LISBON) LISBON, ND · 1,675 people · Groundwater Purchased HORACE CITY OF HORACE, ND · 1,641 people · Surface Water Purchased HILLSBORO CITY OF HILLSBORO, ND · 1,603 people · Groundwater BOWMAN CITY OF BOWMAN, ND · 1,470 people · Groundwater GARRISON CITY OF GARRISON, ND · 1,453 people · Surface Water CROSBY CITY OF CROSBY, ND · 1,406 people · Surface Water Purchased PARK RIVER CITY OF PARK RIVER, ND · 1,403 people · Groundwater ELLENDALE CITY OF ELLENDALE, ND · 1,394 people · Groundwater Purchased NEW ROCKFORD CITY OF NEW ROCKFORD, ND · 1,391 people · Groundwater SURREY CITY OF SURREY, ND · 1,365 people · Groundwater Purchased LARIMORE CITY OF LARIMORE, ND · 1,346 people · Groundwater Purchased ALEXANDER CITY OF ALEXANDER, ND · 1,335 people · Groundwater MAPLETON CITY OF MAPLETON, ND · 1,320 people · Groundwater Purchased CAVALIER CITY OF CAVALIER, ND · 1,302 people · Groundwater Purchased UPPER SOURIS WATER DISTRICT-SYSTEM I KENMARE, ND · 1,296 people · Groundwater Purchased ROLLA CITY OF ROLLA, ND · 1,280 people · Groundwater SOUTHEAST WUD (WEST) FULLERTON, ND · 1,275 people · Groundwater WASHBURN CITY OF WASHBURN, ND · 1,246 people · Surface Water HETTINGER CITY OF HETTINGER, ND · 1,226 people · Surface Water Purchased STANLEY CITY OF STANLEY, ND · 1,138 people · Surface Water Purchased DAKOTA RURAL WATER DISTRICT SOUTH FINLEY, ND · 1,135 people · Groundwater CANDO CITY OF CANDO, ND · 1,115 people · Groundwater Purchased LINTON CITY OF LINTON, ND · 1,097 people · Surface Water Purchased VELVA CITY OF VELVA, ND · 1,084 people · Groundwater ALL SEASONS WD-SYSTEM V BOTTINEAU, ND · 1,075 people · Groundwater Purchased DAKOTA RURAL WATER DISTRICT NORTH FINLEY, ND · 1,070 people · Groundwater BURLINGTON CITY OF BURLINGTON, ND · 1,060 people · Groundwater Purchased BELFIELD CITY OF BELFIELD, ND · 1,013 people · Surface Water Purchased R & T WATER SYSTEM RAY, ND · 1,003 people · Surface Water Purchased WALHALLA CITY OF WALHALLA, ND · 996 people · Groundwater Purchased COOPERSTOWN CITY OF COOPERSTOWN, ND · 984 people · Groundwater BEACH CITY OF BEACH, ND · 981 people · Surface Water Purchased KENMARE CITY OF KENMARE, ND · 961 people · Groundwater Purchased WISHEK CITY OF WISHEK, ND · 952 people · Groundwater RAY CITY OF RAY, ND · 950 people · Surface Water Purchased NEW SALEM CITY OF NEW SALEM, ND · 946 people · Surface Water Purchased NORTHWOOD CITY OF NORTHWOOD, ND · 945 people · Groundwater Purchased KILLDEER CITY OF KILLDEER, ND · 939 people · Surface Water Purchased HANKINSON CITY OF HANKINSON, ND · 919 people · Groundwater Purchased ALL SEASONS WD-SYSTEM I BOTTINEAU, ND · 890 people · Groundwater LAMOURE CITY OF LAMOURE, ND · 889 people · Groundwater Purchased ENDERLIN CITY OF ENDERLIN, ND · 886 people · Groundwater TRENTON WATER USERS ASSOC TRENTON, ND · 840 people · Surface Water Purchased DRAYTON CITY OF DRAYTON, ND · 824 people · Groundwater Purchased GLEN ULLIN CITY OF GLEN ULLIN, ND · 807 people · Surface Water Purchased NAPOLEON CITY OF NAPOLEON, ND · 792 people · Groundwater ALL SEASONS WD-SYSTEM III BOTTINEAU, ND · 790 people · Groundwater Purchased MOHALL CITY OF MOHALL, ND · 783 people · Groundwater Purchased UNDERWOOD CITY OF UNDERWOOD, ND · 778 people · Surface Water Purchased HATTON CITY OF HATTON, ND · 777 people · Groundwater Purchased DUNSEITH CITY OF DUNSEITH, ND · 773 people · Groundwater GWINNER CITY OF GWINNER, ND · 753 people · Groundwater ASHLEY CITY OF ASHLEY, ND · 749 people · Surface Water Purchased HEBRON CITY OF HEBRON, ND · 747 people · Surface Water Purchased MOTT CITY OF MOTT, ND · 721 people · Surface Water Purchased HARWOOD CITY OF HARWOOD, ND · 718 people · Groundwater STEELE CITY OF STEELE, ND · 715 people · Groundwater WILTON CITY OF WILTON, ND · 711 people KINDRED CITY OF KINDRED, ND · 692 people · Groundwater Purchased LAKOTA CITY OF LAKOTA, ND · 672 people · Groundwater ALL SEASONS WD-SYSTEM IV BOTTINEAU, ND · 670 people · Groundwater MILNOR CITY OF MILNOR, ND · 653 people · Groundwater Purchased LIDGERWOOD CITY OF LIDGERWOOD, ND · 652 people · Groundwater Purchased ELGIN CITY OF ELGIN, ND · 642 people · Surface Water Purchased PORTLAND CITY OF PORTLAND, ND · 606 people · Groundwater Purchased MINTO CITY OF MINTO, ND · 604 people · Groundwater Purchased NEW ENGLAND CITY OF NEW ENGLAND, ND · 600 people · Surface Water Purchased PEMBINA CITY OF PEMBINA, ND · 592 people · Groundwater Purchased CENTER CITY OF CENTER, ND · 588 people · Surface Water Purchased TURTLE LAKE CITY OF TURTLE LAKE, ND · 581 people · Groundwater Purchased EDGELEY CITY OF EDGELEY, ND · 563 people · Groundwater Purchased RICHARDTON CITY OF RICHARDTON, ND · 529 people · Surface Water Purchased FORMAN CITY OF FORMAN, ND · 504 people · Groundwater ROLETTE CITY OF ROLETTE, ND · 484 people · Groundwater TOWNER CITY OF TOWNER, ND · 479 people · Groundwater FESSENDEN CITY OF FESSENDEN, ND · 479 people · Groundwater Purchased ARGUSVILLE CITY OF ARGUSVILLE, ND · 475 people · Groundwater Purchased GREATER RAMSEY WD - CARRINGTON DEVILS LAKE, ND · 455 people · Groundwater Purchased BERTHOLD CITY OF BERTHOLD, ND · 454 people · Groundwater Purchased WEST RIVER WATER AND SEWER MINOT, ND · 450 people · Groundwater Purchased FINLEY CITY OF FINLEY, ND · 445 people · Groundwater Purchased WESTHOPE CITY OF WESTHOPE, ND · 429 people · Groundwater Purchased WYNDMERE CITY OF WYNDMERE, ND · 429 people · Groundwater Purchased LEEDS CITY OF LEEDS, ND · 427 people · Groundwater EMERADO CITY OF EMERADO, ND · 414 people · Groundwater Purchased STRASBURG CITY OF STRASBURG, ND · 409 people · Surface Water Purchased STATE LINE WATER COOP INC BISMARCK, ND · 405 people · Surface Water Purchased MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 3 TURTLE LAKE, ND · 400 people · Surface Water Purchased MCLEAN-SHERIDAN WATER DISTRICT-SYSTEM 2 TURTLE LAKE, ND · 390 people · Surface Water Purchased MADDOCK CITY OF MADDOCK, ND · 382 people · Groundwater GLENBURN CITY OF GLENBURN, ND · 380 people · Groundwater Purchased MC CLUSKY CITY OF MC CLUSKY, ND · 380 people · Groundwater Purchased NECHE CITY OF NECHE, ND · 371 people · Groundwater Purchased FAIRMOUNT CITY OF FAIRMOUNT, ND · 367 people · Groundwater STANTON CITY OF STANTON, ND · 366 people · Surface Water Purchased SAWYER CITY OF SAWYER, ND · 357 people · Groundwater Purchased KULM CITY OF KULM, ND · 354 people · Groundwater Purchased MCVILLE CITY OF MCVILLE, ND · 349 people · Groundwater IMPERIAL VALLEY WATER CO BISMARCK, ND · 345 people ST JOHN CITY OF ST JOHN, ND · 341 people · Groundwater ARTHUR CITY OF ARTHUR, ND · 337 people · Groundwater Purchased BOWBELLS CITY OF BOWBELLS, ND · 336 people · Groundwater Purchased MAX CITY OF MAX, ND · 334 people · Groundwater Purchased ST THOMAS CITY OF ST. THOMAS, ND · 331 people · Groundwater Purchased CROWN BUTTE COOP MANDAN, ND · 320 people · Surface Water Purchased GACKLE CITY OF GACKLE, ND · 310 people · Groundwater Purchased MEDINA CITY OF MEDINA, ND · 308 people · Groundwater OXBOW CITY OF KINDRED, ND · 305 people · Groundwater SOUTH HEART CITY OF SOUTH HEART, ND · 301 people · Surface Water Purchased INSPIRE COMMUNITIES-SPRINGBROOK WILLISTON, ND · 300 people · Surface Water Purchased MICHIGAN CITY OF MICHIGAN, ND · 294 people · Groundwater CARSON CITY OF CARSON, ND · 293 people · Surface Water Purchased SCRANTON CITY OF SCRANTON, ND · 281 people · Surface Water Purchased POWERS LAKE CITY OF POWERS LAKE, ND · 280 people · Groundwater DRAKE CITY OF DRAKE, ND · 275 people · Groundwater ABERCROMBIE CITY OF ABERCROMBIE, ND · 263 people · Groundwater HUNTER CITY OF HUNTER, ND · 261 people · Groundwater Purchased HOPE CITY OF HOPE, ND · 258 people · Groundwater Purchased TOWER CITY CITY OF VALLEY CITY, ND · 253 people · Groundwater Purchased DAVENPORT CITY OF DAVENPORT, ND · 252 people · Groundwater Purchased LANSFORD CITY OF LANSFORD, ND · 245 people · Groundwater Purchased GRENORA CITY OF GRENORA, ND · 244 people · Groundwater SHERWOOD CITY OF SHERWOOD, ND · 242 people · Groundwater Purchased GRANVILLE CITY OF GRANVILLE, ND · 241 people · Groundwater Purchased GLADSTONE CITY OF GLADSTONE, ND · 239 people · Surface Water Purchased ZAP CITY OF ZAP, ND · 237 people · Surface Water Purchased HAZELTON CITY OF HAZELTON, ND · 235 people · Groundwater WALCOTT CITY OF WALCOTT, ND · 235 people · Groundwater Purchased PAGE CITY OF PAGE, ND · 232 people · Groundwater Purchased FLASHER CITY OF FLASHER, ND · 232 people · Surface Water Purchased UPPER SOURIS WATER DISTRICT-SYSTEM II KENMARE, ND · 230 people · Groundwater Purchased PRAIRIE VIEW HOA WILLISTON, ND · 226 people · Surface Water Purchased MINNEWAUKAN CITY OF MINNEWAUKAN, ND · 224 people · Groundwater ANETA CITY OF ANETA, ND · 222 people · Groundwater Purchased NEW LEIPZIG CITY OF NEW LEIPZIG, ND · 221 people · Surface Water Purchased WIMBLEDON CITY OF VALLEY CITY, ND · 216 people · Groundwater Purchased RIVERDALE CITY OF RIVERDALE, ND · 205 people · Surface Water SHEYENNE CITY OF SHEYENNE, ND · 204 people · Groundwater APPLE VALLEY COOP MENOKEN, ND · 200 people RIVERVIEW HEIGHTS MANDAN, ND · 200 people · Surface Water Purchased MOORETON CITY OF MOORETON, ND · 197 people · Groundwater Purchased SANBORN CITY OF SANBORN, ND · 192 people · Groundwater Purchased BUFFALO CITY OF BUFFALO, ND · 188 people · Groundwater Purchased HALLIDAY CITY OF HALLIDAY, ND · 188 people · Surface Water Purchased BINFORD CITY OF BINFORD, ND · 183 people · Groundwater Purchased GOLDEN VALLEY CITY OF GOLDEN VALLEY, ND · 182 people · Surface Water Purchased EDMORE CITY OF EDMORE, ND · 182 people · Groundwater Purchased ARVILLA WATER USERS ASSOCIATION ARVILLA, ND · 180 people · Groundwater Purchased GRANDIN CITY OF GRANDIN, ND · 173 people · Groundwater Purchased SOUTHWEST WA-JUNCTION INN(MISSOURI WEST) DICKINSON, ND · 173 people · Surface Water Purchased LITCHVILLE CITY OF VALLEY CITY, ND · 172 people · Groundwater Purchased PLAZA CITY OF MINOT, ND · 171 people · Surface Water Purchased STREETER CITY OF STREETER, ND · 170 people · Groundwater RHAME CITY OF RHAME, ND · 169 people · Surface Water Purchased TOLNA CITY OF TOLNA, ND · 166 people · Groundwater Purchased WILLOW CITY CITY OF WILLOW CITY, ND · 163 people · Groundwater Purchased RUTLAND CITY OF RUTLAND, ND · 163 people · Groundwater Purchased KENSAL CITY OF KENSAL, ND · 163 people · Groundwater Purchased REEDER CITY OF REEDER, ND · 162 people · Surface Water Purchased COUNTRY CLUB CO-OP MANDAN, ND · 162 people REGENT CITY OF REGENT, ND · 160 people · Surface Water Purchased CHRISTINE CITY OF CHRISTINE, ND · 156 people · Groundwater Purchased LIGNITE CITY OF LIGNITE, ND · 155 people · Groundwater MAKOTI CITY OF MAKOTI, ND · 154 people · Groundwater WING CITY OF WING, ND · 152 people · Groundwater TAYLOR CITY OF TAYLOR, ND · 148 people · Surface Water Purchased DUNN CENTER CITY OF DUNN CENTER, ND · 146 people · Surface Water Purchased MAPLE RIVER HUTTERIAN ASSOCIATION FULLERTON, ND · 140 people · Groundwater MARMARTH CITY OF MARMARTH, ND · 136 people · Groundwater OSNABROCK CITY OF DEVILS LAKE, ND · 134 people · Groundwater Purchased COLUMBUS CITY OF COLUMBUS, ND · 133 people · Surface Water Purchased HANNAFORD CITY OF HANNAFORD, ND · 131 people · Groundwater Purchased BOWDON CITY OF BOWDON, ND · 131 people · Groundwater Purchased UPHAM CITY OF UPHAM, ND · 130 people · Groundwater Purchased PORTAL CITY OF PORTAL, ND · 126 people · Groundwater BISBEE CITY OF BISBEE, ND · 126 people · Groundwater Purchased PICK CITY CITY OF PICK CITY, ND · 123 people · Surface Water Purchased ALMONT CITY OF ALMONT, ND · 122 people · Surface Water Purchased NOONAN CITY OF NOONAN, ND · 121 people · Surface Water Purchased COLFAX CITY OF COLFAX, ND · 121 people · Groundwater Purchased ORISKA CITY OF ORISKA, ND · 118 people · Groundwater Purchased SYKESTON CITY OF SYKESTON, ND · 117 people · Groundwater Purchased MEDORA CITY OF MEDORA, ND · 112 people · Surface Water Purchased HORSESHOE BEND HORACE, ND · 110 people · Groundwater Purchased SUNDALE HUTTERIAN ASSOCIATION MILNOR, ND · 110 people · Groundwater WILDROSE CITY OF WILDROSE, ND · 110 people · Surface Water Purchased OBERON CITY OF OBERON, ND · 105 people · Groundwater FOREST RIVER COLONY FORDVILLE, ND · 100 people · Groundwater FAIRVIEW COLONY LAMOURE, ND · 100 people · Groundwater GOODRICH CITY OF GOODRICH, ND · 98 people · Groundwater ROSS CITY OF ROSS, ND · 97 people · Surface Water Purchased SHARON CITY OF SHARON, ND · 96 people · Groundwater Purchased WILLOWBANK COLONY EDGELEY, ND · 95 people · Groundwater SHELDON CITY OF SHELDON, ND · 95 people · Groundwater Purchased AMENIA CITY OF AMENIA, ND · 94 people · Groundwater Purchased

North Dakota Drinking Water: Frequently Asked Questions

Is North Dakota tap water safe to drink?

North Dakota has 303 community water systems regulated by the EPA serving a combined 706,282 people. Water quality varies by system — search above to find your specific utility and see its violation history, lead test results, and safety grade.

How many water systems are in North Dakota?

There are 303 EPA-regulated community water systems in North Dakota serving a combined 706,282 people. Each system is required to test for over 90 contaminants and publicly report any violations.

Does North Dakota have PFAS in its drinking water?

PFAS (forever chemicals) have been detected in water systems across the country, including North Dakota. The EPA finalized enforceable PFAS limits in 2024. Search for your specific water system above to see if PFAS were detected and whether levels exceed the new federal limits.

EPA data last updated: 2026-07-12