325 community and non-transient non-community water systems are listed for North Dakota in EPA SDWIS. 41 were sampled under UCMR 5; 7 of those had at least one PFAS result at or above the reporting level, and 0 had a highest single result at or above a 2024 EPA limit (PFOA or PFOS 4 ppt, or Hazard Index 1).
North Dakota map · Download: systems (CSV) · all results (CSV, gzip)
These are monitoring results collected under EPA's Fifth Unregulated Contaminant Monitoring Rule (UCMR 5) at entry points, where treated water enters the distribution system; they are not tap-water samples. They are not compliance determinations: compliance with EPA's 2024 PFAS limits is judged on running annual averages of compliance monitoring, required from 2029, so a single UCMR 5 result at or above a limit is not a violation. “< MRL” means the compound was not quantified at EPA's minimum reporting level; it does not mean zero.
Sampled under UCMR 5 (41)
| System | PWSID | City | Population | Highest PFOA (ppt) | Highest PFOS (ppt) | Highest HI | Highest single result |
|---|---|---|---|---|---|---|---|
| Agassiz Water Users District | ND1801056 | Gilby | 3,438 | <MRL | <MRL | 0 | No PFAS detected |
| Barnes Rural Water District | ND0201058 | Valley City | 4,938 | <MRL | <MRL | 0 | No PFAS detected |
| Beach City Of | ND1700059 | Beach | 981 | <MRL | <MRL | 0 | No PFAS detected |
| Belcourt-Turtle Mtn Rural Water System | 083890023 | Belcourt | 13,500 | <MRL | <MRL | 0 | No PFAS detected |
| Beulah City Of | ND2900074 | Beulah | 3,058 | <MRL | <MRL | 0 | No PFAS detected |
| Bismarck City Of | ND0800080 | Bismarck | 72,417 | <MRL | <MRL | 0 | No PFAS detected |
| Cass Rural Water District Fargo | ND0901483 | Kindred | 4,242 | <MRL | <MRL | 0 | Other PFAS detected |
| Cass Rural Water District-Phase I | ND0901060 | Kindred | 3,658 | <MRL | <MRL | 0 | No PFAS detected |
| Cass Rural Water District-Phase Ii | ND0901124 | Kindred | 1,700 | <MRL | <MRL | 0 | No PFAS detected |
| Central Plains Water District | ND5201309 | Fessenden | 3,504 | <MRL | <MRL | 0 | Other PFAS detected |
| Devils Lake City Of | ND3600231 | Devils Lake | 7,141 | <MRL | <MRL | 0 | No PFAS detected |
| Dickinson City Of | ND4500242 | Dickinson | 25,679 | <MRL | <MRL | 0 | No PFAS detected |
| East Central Regional Wd-Gf | ND1801062 | Thompson | 5,995 | <MRL | <MRL | 0 | No PFAS detected |
| Fargo City Of | ND0900336 | Fargo | 120,762 | <MRL | <MRL | 0 | No PFAS detected |
| Grafton City Of | ND5000408 | Grafton | 4,284 | <MRL | <MRL | 0 | Other PFAS detected |
| Grand Forks Regional Wtp | ND1800410 | Grand Forks | 57,339 | <MRL | <MRL | 0 | Other PFAS detected |
| Greater Ramsey Water District | ND3601424 | Devils Lake | 5,280 | <MRL | <MRL | 0 | No PFAS detected |
| Grenora City Of | ND5300425 | Grenora | 244 | <MRL | <MRL | 0 | No PFAS detected |
| Jamestown City Of | ND4700498 | Jamestown | 15,427 | <MRL | <MRL | 0 | No PFAS detected |
| Larimore City Of | ND1800550 | Larimore | 1,346 | <MRL | <MRL | 0 | No PFAS detected |
| Lincoln City Of | ND0800570 | Lincoln | 4,257 | <MRL | <MRL | 0 | No PFAS detected |
| Mandan City Of | ND3000596 | Mandan | 21,769 | <MRL | <MRL | 0 | No PFAS detected |
| Minot City Of | ND5100660 | Minot | 48,743 | <MRL | <MRL | 0 | No PFAS detected |
| Missouri West Water System | ND3001431 | Mandan | 4,303 | <MRL | <MRL | 0 | No PFAS detected |
| North Prairie Rwd-System 1&2 | ND5101125 | Minot | 7,748 | <MRL | <MRL | 0 | Other PFAS detected |
| Northeast Rwd- North Valley Branch | ND3401128 | Cavalier | 3,422 | <MRL | <MRL | 0 | No PFAS detected |
| Northwest Rural Water District | ND5301079 | Williston | 5,102 | <MRL | <MRL | 0 | Other PFAS detected |
| Omnd Water Treatment Plant | ND2901491 | Dickinson | 4,168 | <MRL | <MRL | 0 | No PFAS detected |
| South Central Regional Water District | ND0801154 | Bismarck | 3,700 | <MRL | <MRL | 0 | Other PFAS detected |
| South Central Rwd North Burleigh | ND0801502 | Bismarck | 10,400 | <MRL | <MRL | 0 | No PFAS detected |
| South Central Rwd-Emmons | ND1501653 | Bismarck | 3,650 | <MRL | <MRL | 0 | No PFAS detected |
| Southeast Wud (East) | ND3901068 | Mantador | 4,225 | <MRL | <MRL | 0 | No PFAS detected |
| Southwest Water Authority | ND4501434 | Dickinson | 8,537 | <MRL | <MRL | 0 | No PFAS detected |
| Spirit Lake Water Management Rws | 083890025 | St. Michael | 4,400 | <MRL | <MRL | 0 | No PFAS detected |
| Standing Rock Rural Water System | 084690510 | Fort Yates | 6,839 | <MRL | <MRL | 0 | No PFAS detected |
| Stutsman Rural Water District | ND4701303 | Jamestown | 5,550 | <MRL | <MRL | 0 | No PFAS detected |
| Valley City City Of | ND0200958 | Valley City | 6,585 | <MRL | <MRL | 0 | No PFAS detected |
| Wahpeton City Of | ND3900973 | Wahpeton | 7,766 | <MRL | <MRL | 0 | No PFAS detected |
| Watford City City Of | ND2700990 | Watford City | 6,390 | <MRL | <MRL | 0 | No PFAS detected |
| West Fargo City Of | ND0900999 | West Fargo | 34,858 | <MRL | <MRL | 0 | No PFAS detected |
| Williston City Of | ND5301012 | Williston | 26,426 | <MRL | <MRL | 0 | No PFAS detected |
Not tested under UCMR 5 (284)
UCMR 5 required monitoring by systems serving 3,300 or more people and by a representative sample of smaller systems. The systems below have no UCMR 5 results in EPA's data. Not tested is not the same as not detected: the absence of results says nothing about PFAS in their water.
| System | PWSID | Type | City | Population | Counties |
|---|---|---|---|---|---|
| 13 Mile Center | ND5311738 | NTNCWS | Williston | 50 | Williams County |
| Abercrombie City Of | ND3900001 | CWS | Abercrombie | 263 | Richland County |
| Alexander City Of | ND2700006 | CWS | Alexander | 1,335 | McKenzie County |
| All Seasons Wd-System I | ND0501057 | CWS | Bottineau | 890 | Bottineau County |
| All Seasons Wd-System Iii | ND0501127 | CWS | Bottineau | 790 | Bottineau County |
| All Seasons Wd-System Iv | ND4001153 | CWS | Bottineau | 670 | Rolette County |
| All Seasons Wd-System V | ND3501476 | CWS | Bottineau | 1,075 | Bottineau County, Pierce County |
| Almont City Of | ND3000012 | CWS | Almont | 122 | Morton County |
| Amenia City Of | ND0900017 | CWS | Amenia | 94 | Cass County |
| Aneta City Of | ND3200023 | CWS | Aneta | 222 | Nelson County |
| Apple Valley Coop | ND0800648 | CWS | Menoken | 200 | Burleigh County |
| Argusville City Of | ND0900030 | CWS | Argusville | 475 | Cass County |
| Arnegard City Of | ND2701506 | CWS | Arnegard | 28 | McKenzie County |
| Arthur City Of | ND0900035 | CWS | Arthur | 337 | Cass County |
| Arvilla Water Users Association | ND1800036 | CWS | Arvilla | 180 | Grand Forks County |
| Ashley City Of | ND2600038 | CWS | Ashley | 749 | McIntosh County |
| Barney City Of | ND3900055 | CWS | Barney | 52 | Richland County |
| Belfield City Of | ND4500065 | CWS | Belfield | 1,013 | Stark County |
| Berlin City Of | ND2301216 | CWS | Berlin | 34 | LaMoure County |
| Berthold City Of | ND5100072 | CWS | Berthold | 454 | Ward County |
| Binford City Of | ND2000077 | CWS | Binford | 183 | Griggs County |
| Bisbee City Of | ND4800078 | CWS | Bisbee | 126 | Towner County |
| Bottineau City Of | ND0500099 | CWS | Bottineau | 2,211 | Bottineau County |
| Bowbells City Of | ND0700114 | CWS | Bowbells | 336 | Burke County |
| Bowdon City Of | ND5200118 | CWS | Bowdon | 131 | Wells County |
| Bowman City Of | ND0600119 | CWS | Bowman | 1,470 | Bowman County |
| Buffalo City Of | ND0900134 | CWS | Buffalo | 188 | Cass County |
| Burlington City Of | ND5100138 | CWS | Burlington | 1,060 | Ward County |
| Cando City Of | ND4800152 | CWS | Cando | 1,115 | Towner County |
| Carrington City Of | ND1600159 | CWS | Carrington | 2,065 | Foster County |
| Carson City Of | ND1900162 | CWS | Carson | 293 | Grant County |
| Cass Rural Water District-Phase Iii | ND0901131 | CWS | Kindred | 1,682 | Cass County |
| Casselton City Of | ND0900166 | CWS | Casselton | 2,513 | Cass County |
| Cathay City Of | ND5200169 | CWS | Cathay | 43 | Wells County |
| Cavalier City Of | ND3400170 | CWS | Cavalier | 1,302 | Pembina County |
| Center City Of | ND3300174 | CWS | Center | 588 | Oliver County |
| Christine City Of | ND3900183 | CWS | Christine | 156 | Richland County |
| Cleveland City Of | ND4700188 | CWS | Cleveland | 83 | Stutsman County |
| Coleharbor City Of | ND2800194 | CWS | Coleharbor | 79 | McLean County |
| Colfax City Of | ND3900196 | CWS | Colfax | 121 | Richland County |
| Columbus City Of | ND0700198 | CWS | Columbus | 133 | Burke County |
| Cooperstown City Of | ND2000203 | CWS | Cooperstown | 984 | Griggs County |
| Country Acres Water Co | ND0901449 | CWS | Horace | 50 | Cass County |
| Country Club Co-Op | ND0800144 | CWS | Mandan | 162 | Burleigh County |
| Crosby City Of | ND1200211 | CWS | Crosby | 1,406 | Divide County |
| Crown Butte Coop | ND3000597 | CWS | Mandan | 320 | Morton County |
| Dakota Adventist Academy | ND0800096 | CWS | Bismarck | 80 | Burleigh County |
| Dakota Magic Casino | 083890026 | CWS | Hankinson | 2,360 | Richland County |
| Dakota Rural Water District North | ND2001061 | CWS | Finley | 1,070 | Griggs County |
| Dakota Rural Water District South | ND2001121 | CWS | Finley | 1,135 | Griggs County |
| Davenport City Of | ND0900217 | CWS | Davenport | 252 | Cass County |
| Dazey City Of | ND0200226 | CWS | Valley City | 78 | Barnes County |
| Dodge City Of | ND1300259 | CWS | Dodge | 87 | Dunn County |
| Drake City Of | ND2500266 | CWS | Drake | 275 | McHenry County |
| Drayton City Of | ND3400269 | CWS | Drayton | 824 | Pembina County |
| Dunn Center City Of | ND1300276 | CWS | Dunn Center | 146 | Dunn County |
| Dunseith City Of | ND4000277 | CWS | Dunseith | 773 | Rolette County |
| East Central Regional Wd-Traill | ND4901071 | CWS | Thompson | 2,800 | Steele County, Traill County |
| Edgeley City Of | ND2300291 | CWS | Edgeley | 563 | LaMoure County |
| Edmore City Of | ND3600298 | CWS | Edmore | 182 | Ramsey County |
| Elgin City Of | ND1900303 | CWS | Elgin | 642 | Grant County |
| Ellendale City Of | ND1100306 | CWS | Ellendale | 1,394 | Dickey County |
| Emerado City Of | ND1800311 | CWS | Emerado | 414 | Grand Forks County |
| Enderlin City Of | ND3700314 | CWS | Enderlin | 886 | Ransom County |
| Fairmount City Of | ND3900333 | CWS | Fairmount | 367 | Richland County |
| Fairview Colony | ND2300544 | CWS | Lamoure | 100 | LaMoure County |
| Fendee Estates | ND5301764 | CWS | Henderson | 30 | Williams County |
| Fessenden City Of | ND5200338 | CWS | Fessenden | 479 | Wells County |
| Finley City Of | ND4600341 | CWS | Finley | 445 | Steele County |
| Flasher City Of | ND3000342 | CWS | Flasher | 232 | Morton County |
| Flaxton City Of | ND0700344 | CWS | Flaxton | 66 | Burke County |
| Forbes City Of | ND1100346 | CWS | Forbes | 53 | Dickey County |
| Fordville Public School | ND5010352 | NTNCWS | Fordville | 75 | Walsh County |
| Forest River Colony | ND1801456 | CWS | Fordville | 100 | Grand Forks County |
| Forman City Of | ND4100357 | CWS | Forman | 504 | Sargent County |
| Fortuna City Of | ND1200369 | CWS | Fortuna | 35 | Divide County |
| Four Bears Water System | 083890015 | CWS | New Town | 1,200 | McKenzie County |
| Fradets Orchard Water System | ND0901410 | CWS | Horace | 56 | Cass County |
| Fullerton City Of | ND1100379 | CWS | Fullerton | 54 | Dickey County |
| Gackle City Of | ND2400380 | CWS | Gackle | 310 | Logan County |
| Gardner City Of | ND0900387 | CWS | Gardner | 74 | Cass County |
| Garrison City Of | ND2800389 | CWS | Garrison | 1,453 | McLean County |
| Garrison Rural Water District | ND2801430 | CWS | Garrison | 1,805 | McLean County |
| Gladstone City Of | ND4500396 | CWS | Gladstone | 239 | Stark County |
| Glen Ullin City Of | ND3000400 | CWS | Glen Ullin | 807 | Morton County |
| Glenburn City Of | ND3800397 | CWS | Glenburn | 380 | Renville County |
| Glenfield City Of | ND1600398 | CWS | Glenfield | 91 | Foster County |
| Golden Valley City Of | ND2900402 | CWS | Golden Valley | 182 | Mercer County |
| Golva City Of | ND1700403 | CWS | Golva | 61 | Golden Valley County |
| Goodrich City Of | ND4200404 | CWS | Goodrich | 98 | Sheridan County |
| Grandin City Of | ND0900412 | CWS | Grandin | 173 | Cass County |
| Grant Colony | ND3701801 | CWS | Enderlin | 25 | Ransom County |
| Granville City Of | ND2500415 | CWS | Granville | 241 | McHenry County |
| Greater Ramsey Wd - Carrington | ND1601470 | CWS | Devils Lake | 455 | Foster County |
| Gwinner City Of | ND4100428 | CWS | Gwinner | 753 | Sargent County |
| Hague City Of | ND1500429 | CWS | Hague | 71 | Emmons County |
| Halliday City Of | ND1300432 | CWS | Halliday | 188 | Dunn County |
| Hankinson City Of | ND3900443 | CWS | Hankinson | 919 | Richland County |
| Hannaford City Of | ND2000446 | CWS | Hannaford | 131 | Griggs County |
| Harvey City Of | ND5200458 | CWS | Harvey | 1,783 | Wells County |
| Harwood City Of | ND0900460 | CWS | Harwood | 718 | Cass County |
| Hatton City Of | ND4900465 | CWS | Hatton | 777 | Traill County |
| Hazelton City Of | ND1500469 | CWS | Hazelton | 235 | Emmons County |
| Hazen City Of | ND2900470 | CWS | Hazen | 2,411 | Mercer County |
| Hebron City Of | ND3000473 | CWS | Hebron | 747 | Morton County |
| Hettinger City Of | ND0100476 | CWS | Hettinger | 1,226 | Adams County |
| Hillsboro City Of | ND4900482 | CWS | Hillsboro | 1,603 | Traill County |
| Hope City Of | ND4600487 | CWS | Hope | 258 | Steele County |
| Horace City Of | ND0900488 | CWS | Horace | 1,641 | Cass County |
| Horseshoe Bend | ND0900489 | CWS | Horace | 110 | Cass County |
| Hunter City Of | ND0900492 | CWS | Hunter | 261 | Cass County |
| Imperial Valley Water Co | ND0800083 | CWS | Bismarck | 345 | Burleigh County |
| Inspire Communities-Springbrook | ND5301063 | CWS | Phoenix | 300 | Williams County |
| Jud City Of | ND2300508 | CWS | Jud | 72 | LaMoure County |
| Karlsruhe City Of | ND2500509 | CWS | Karlsruhe | 82 | McHenry County |
| Kenmare City Of | ND5100515 | CWS | Kenmare | 961 | Ward County |
| Kensal City Of | ND4700519 | CWS | Kensal | 163 | Stutsman County |
| Killdeer City Of | ND1300520 | CWS | Killdeer | 939 | Dunn County |
| Kindred City Of | ND0900524 | CWS | Kindred | 692 | Cass County |
| Kulm City Of | ND2300535 | CWS | Kulm | 354 | LaMoure County |
| Lakota City Of | ND3200536 | CWS | Lakota | 672 | Nelson County |
| Lamoure City Of | ND2300537 | CWS | Lamoure | 889 | LaMoure County |
| Langdon City Of | ND1000543 | CWS | Langdon | 1,878 | Cavalier County |
| Lansford City Of | ND0500549 | CWS | Lansford | 245 | Bottineau County, Renville County |
| Leeds City Of | ND0300553 | CWS | Leeds | 427 | Benson County, Pierce County |
| Lehr City Of | ND2600556 | CWS | Lehr | 80 | McIntosh County |
| Lidgerwood City Of | ND3900567 | CWS | Lidgerwood | 652 | Richland County |
| Lignite City Of | ND0700569 | CWS | Lignite | 155 | Burke County |
| Linton City Of | ND1500571 | CWS | Linton | 1,097 | Emmons County |
| Lisbon City Of | ND3700574 | CWS | Lisbon | 2,154 | Ransom County |
| Litchville City Of | ND0200581 | CWS | Valley City | 172 | Barnes County |
| Little Shell | 083890016 | CWS | New Town | 1,500 | |
| Maddock City Of | ND0300587 | CWS | Maddock | 382 | Benson County |
| Makoti City Of | ND5100593 | CWS | Makoti | 154 | Ward County |
| Mandaree Water Plant | 083890001 | CWS | New Town | 1,034 | McKenzie County |
| Manning Water Board | ND1300606 | CWS | Manning | 55 | Dunn County |
| Mantador City Of | ND3900607 | CWS | Mantador | 64 | Richland County |
| Maple River Hutterian Association | ND1101481 | CWS | Fullerton | 140 | Dickey County |
| Mapleton City Of | ND0900613 | CWS | Mapleton | 1,320 | Cass County |
| Marmarth City Of | ND4400615 | CWS | Marmarth | 136 | Slope County |
| Max City Of | ND2800619 | CWS | Max | 334 | McLean County |
| Maxbass City Of | ND0500620 | CWS | Maxbass | 84 | Bottineau County |
| Mayville City Of | ND4900622 | CWS | Mayville | 1,858 | Traill County |
| Mc Clusky City Of | ND4200626 | CWS | Mc Clusky | 380 | Burleigh County, Sheridan County |
| Mckenzie County Wrd | ND2701477 | CWS | Watford City | 3,895 | McKenzie County |
| Mclean-Sheridan Water District-System 1 | ND2801400 | CWS | Turtle Lake | 1,800 | McLean County |
| Mclean-Sheridan Water District-System 2 | ND2801696 | CWS | Turtle Lake | 390 | McLean County |
| Mclean-Sheridan Water District-System 3 | ND2801487 | CWS | Turtle Lake | 400 | McLean County |
| Mcville City Of | ND3200636 | CWS | Mcville | 349 | Nelson County |
| Medina City Of | ND4700637 | CWS | Medina | 308 | Stutsman County |
| Medora City Of | ND0400638 | CWS | Medora | 112 | Billings County |
| Menards-Bidc | ND0811773 | NTNCWS | Mckenzie | 120 | Burleigh County |
| Mercer City Of | ND2800650 | CWS | Mercer | 94 | McLean County |
| Michigan City Of | ND3200653 | CWS | Michigan | 294 | Nelson County |
| Milnor City Of | ND4101425 | CWS | Milnor | 653 | Sargent County |
| Milton City Of | ND1000658 | CWS | Devils Lake | 58 | Cavalier County |
| Milton R Young Station Well - Mpc | ND3310177 | NTNCWS | Center | 150 | Oliver County |
| Minnewaukan City Of | ND0300659 | CWS | Minnewaukan | 224 | Benson County |
| Minto City Of | ND5000691 | CWS | Minto | 604 | Walsh County |
| Mohall City Of | ND3800695 | CWS | Mohall | 783 | Bottineau County, Renville County |
| Monango City Of | ND1100698 | CWS | Monango | 36 | Dickey County |
| Montpelier City Of | ND4701151 | CWS | Montpelier | 87 | Stutsman County |
| Mooreton City Of | ND3900703 | CWS | Mooreton | 197 | Richland County |
| Mott City Of | ND2100704 | CWS | Mott | 721 | Hettinger County |
| Mountain City Of | ND3400707 | CWS | Mountain | 92 | Pembina County |
| Napoleon City Of | ND2400715 | CWS | Napoleon | 792 | Logan County |
| Neche City Of | ND3400720 | CWS | Neche | 371 | Pembina County |
| Nekoma City Of | ND1000721 | CWS | Langdon | 50 | Cavalier County |
| New England City Of | ND2100726 | CWS | New England | 600 | Hettinger County |
| New Hradec Waterworks | ND1300730 | CWS | New Hradec | 60 | Dunn County |
| New Leipzig City Of | ND1900731 | CWS | New Leipzig | 221 | Grant County |
| New Rockford City Of | ND1400732 | CWS | New Rockford | 1,391 | Eddy County |
| New Salem City Of | ND3000736 | CWS | New Salem | 946 | Morton County |
| New Town, City Of | 083890029 | CWS | New Town | 2,528 | Mountrail County |
| Nome City Of | ND0200747 | CWS | Nome | 62 | Barnes County |
| Noonan City Of | ND1200748 | CWS | Noonan | 121 | Divide County |
| North Prairie Rwd System Iv | ND3101807 | CWS | Minot | 30 | Mountrail County |
| North Prairie Rwd-System Iii | ND5101065 | CWS | Minot | 2,742 | McHenry County, Ward County |
| Northeast Rwd-Langdon Branch | ND1001380 | CWS | Cavalier | 2,450 | Cavalier County |
| Northwestern Area Water Supply | ND5101687 | CWS | Bismarck | 0 | Ward County |
| Northwood City Of | ND1800753 | CWS | Northwood | 945 | Grand Forks County |
| Oakes City Of | ND1100758 | CWS | Oakes | 1,856 | Dickey County |
| Oberon City Of | ND0300762 | CWS | Oberon | 105 | Benson County |
| Oriska City Of | ND0200763 | CWS | Oriska | 118 | Barnes County |
| Osnabrock City Of | ND1000768 | CWS | Devils Lake | 134 | Cavalier County |
| Oxbow City Of | ND0901363 | CWS | Kindred | 305 | Cass County |
| Page City Of | ND0900769 | CWS | Page | 232 | Cass County |
| Park River City Of | ND5000773 | CWS | Park River | 1,403 | Walsh County |
| Parshall, City Of | 083890030 | CWS | Parshall | 884 | Mountrail County |
| Parshall-Lucky Mound | 083890017 | CWS | New Town | 720 | Dunn County, McKenzie County, McLean County, Mercer County, Mountrail County, Ward County |
| Pembina City Of | ND3400777 | CWS | Pembina | 592 | Pembina County |
| Pick City City Of | ND2900789 | CWS | Pick City | 123 | Mercer County |
| Plaza City Of | ND3100798 | CWS | Minot | 171 | Mountrail County |
| Portal City Of | ND0700800 | CWS | Portal | 126 | Burke County |
| Portland City Of | ND4900803 | CWS | Portland | 606 | Traill County |
| Powers Lake City Of | ND0700804 | CWS | Powers Lake | 280 | Burke County |
| Prairie View Hoa | ND5301766 | CWS | Williston | 226 | Williams County |
| R & T Water System | ND5301152 | CWS | Ray | 1,003 | Burke County, Divide County, Mountrail County, Williams County |
| Rainbow Energy Center | ND2810954 | NTNCWS | Underwood | 532 | McLean County |
| Ray City Of | ND5300809 | CWS | Ray | 950 | Williams County |
| Reeder City Of | ND0100812 | CWS | Reeder | 162 | Adams County |
| Regent City Of | ND2100816 | CWS | Regent | 160 | Hettinger County |
| Rhame City Of | ND0600819 | CWS | Rhame | 169 | Bowman County |
| Richardton City Of | ND4500821 | CWS | Richardton | 529 | Stark County |
| Riverdale City Of | ND2800825 | CWS | Riverdale | 205 | McLean County |
| Riverdale Subdivision | ND0901365 | CWS | Horace | 88 | Cass County |
| Riverview Heights | ND3000598 | CWS | Mandan | 200 | Morton County |
| Robinson City Of | ND2200827 | CWS | Robinson | 37 | Kidder County |
| Rock Lake City Of | ND4800828 | CWS | Rock Lake | 94 | Towner County |
| Rolette City Of | ND4000833 | CWS | Rolette | 484 | Rolette County |
| Rolla City Of | ND4000834 | CWS | Rolla | 1,280 | Rolette County |
| Ross City Of | ND3100838 | CWS | Ross | 97 | Mountrail County |
| Rugby City Of | ND3500842 | CWS | Rugby | 2,876 | Pierce County |
| Rutland City Of | ND4100848 | CWS | Rutland | 163 | Sargent County |
| Ryder City Of | ND5100849 | CWS | Ryder | 85 | Ward County |
| Sanborn City Of | ND0200858 | CWS | Sanborn | 192 | Barnes County |
| Sawyer City Of | ND5100868 | CWS | Sawyer | 357 | Ward County |
| Scranton City Of | ND0600869 | CWS | Scranton | 281 | Bowman County |
| Selfridge, City Of | 083890040 | CWS | Selfridge | 160 | Sioux County |
| Selz Water Users Association | ND3501069 | CWS | Selz | 43 | Pierce County |
| Sentinel Butte City Of | ND1700870 | CWS | Sentinel Butte | 56 | Golden Valley County |
| Sharon City Of | ND4600875 | CWS | Sharon | 96 | Steele County |
| Sheldon City Of | ND3700876 | CWS | Sheldon | 95 | Ransom County |
| Sherwood City Of | ND3800877 | CWS | Sherwood | 242 | Renville County |
| Sheyenne City Of | ND1400879 | CWS | Sheyenne | 204 | Eddy County |
| Sibley City Of | ND0200882 | CWS | Sibley | 30 | Barnes County |
| Solen, City Of | 083890041 | CWS | Solen | 72 | |
| Souris City Of | ND0500887 | CWS | Souris | 58 | Bottineau County |
| South Heart City Of | ND4500891 | CWS | South Heart | 301 | Stark County |
| Southeast Wud (Central-Lisbon) | ND3701448 | CWS | Lisbon | 1,675 | Dickey County, LaMoure County, Ransom County, Sargent County |
| Southeast Wud (West) | ND1101442 | CWS | Fullerton | 1,275 | Dickey County, LaMoure County, Logan County |
| Southwest Wa-Crown Butte(Missouri West) | ND3001488 | CWS | Dickinson | 34 | Morton County |
| Southwest Wa-Junction Inn(Missouri West) | ND3001490 | CWS | Dickinson | 173 | Morton County, Stark County |
| Southwest Wa-Tower Hill (Missouri West) | ND3001489 | CWS | Dickinson | 43 | Morton County |
| St John City Of | ND4000854 | CWS | St John | 341 | Rolette County |
| St Thomas City Of | ND3400856 | CWS | St. Thomas | 331 | Pembina County |
| Stanley City Of | ND3100898 | CWS | Stanley | 1,138 | Mountrail County |
| Stanton City Of | ND2900902 | CWS | Stanton | 366 | Mercer County |
| State Line Water Coop Inc | ND1501310 | CWS | Bismarck | 405 | Emmons County |
| Steele City Of | ND2200913 | CWS | Steele | 715 | Kidder County |
| Strasburg City Of | ND1500921 | CWS | Strasburg | 409 | Emmons County |
| Streeter City Of | ND4700922 | CWS | Streeter | 170 | Stutsman County |
| Sundale Hutterian Association | ND4101452 | CWS | Milnor | 110 | Richland County, Sargent County |
| Surrey City Of | ND5100923 | CWS | Surrey | 1,365 | Ward County |
| Sykeston City Of | ND5200927 | CWS | Sykeston | 117 | Wells County |
| Taylor City Of | ND4500934 | CWS | Taylor | 148 | Stark County |
| The Bluffs Hoa | ND5301779 | CWS | Aberdeen | 30 | Williams County |
| Tioga City Of | ND5300936 | CWS | Tioga | 2,202 | Williams County |
| Tolna City Of | ND3200944 | CWS | Tolna | 166 | Nelson County |
| Tower City City Of | ND0900945 | CWS | Valley City | 253 | Cass County |
| Towner City Of | ND2500946 | CWS | Towner | 479 | McHenry County |
| Trenton Water Users Assoc | ND5300948 | CWS | Trenton | 840 | Williams County |
| Tri-County Water District | ND3201072 | CWS | Petersburg | 2,501 | Grand Forks County, Nelson County, Ramsey County, Steele County, Walsh County |
| Turtle Lake City Of | ND2800949 | CWS | Turtle Lake | 581 | McLean County |
| Tuttle City Of | ND2200951 | CWS | Tuttle | 80 | Kidder County |
| Twin Buttes Water Plant | 083890003 | CWS | New Town | 792 | Dunn County |
| Underwood City Of | ND2800953 | CWS | Underwood | 778 | McLean County |
| Upham City Of | ND2500956 | CWS | Upham | 130 | McHenry County |
| Upper Souris Water District-System I | ND5101074 | CWS | Kenmare | 1,296 | Ward County |
| Upper Souris Water District-System Ii | ND5101130 | CWS | Kenmare | 230 | Ward County |
| Velva City Of | ND2500964 | CWS | Velva | 1,084 | McHenry County |
| Verona City Of | ND2300969 | CWS | Valley City | 85 | LaMoure County |
| Walcott City Of | ND3900976 | CWS | Walcott | 235 | Richland County |
| Walhalla City Of | ND3400980 | CWS | Walhalla | 996 | Pembina County |
| Walsh Rural Water District | ND5001075 | CWS | Grafton | 3,000 | Pembina County, Walsh County |
| Warwick City Of | 083890042 | CWS | Warwick | 65 | |
| Washburn City Of | ND2800989 | CWS | Washburn | 1,246 | McLean County |
| Watford City Mobile Home Park | ND2701003 | CWS | Salem | 52 | McKenzie County |
| Watford Residence Suites | ND2701701 | CWS | Watford City | 32 | McKenzie County |
| West River Water And Sewer | ND5101447 | CWS | Minot | 450 | Ward County |
| Western Area Water Supply Authority | ND5301686 | CWS | Williston | 0 | Williams County |
| Westhope City Of | ND0501001 | CWS | Westhope | 429 | Bottineau County |
| White Shield Water Treatment Plant | 083890002 | CWS | New Town | 952 | McLean County |
| Wildrose City Of | ND5301011 | CWS | Wildrose | 110 | Williams County |
| Willow City City Of | ND0501030 | CWS | Willow City | 163 | Bottineau County |
| Willowbank Colony | ND2301467 | CWS | Edgeley | 95 | LaMoure County |
| Wilton City Of | ND0801031 | CWS | Wilton | 711 | Burleigh County, McLean County |
| Wimbledon City Of | ND0201032 | CWS | Valley City | 216 | Barnes County |
| Wing City Of | ND0801036 | CWS | Wing | 152 | Burleigh County |
| Wishek City Of | ND2601037 | CWS | Wishek | 952 | McIntosh County |
| Woodworth City Of | ND4701042 | CWS | Woodworth | 50 | Stutsman County |
| Wyndmere City Of | ND3901043 | CWS | Wyndmere | 429 | Richland County |
| Zap City Of | ND2901054 | CWS | Zap | 237 | Mercer County |
| Zeeland City Of | ND2601055 | CWS | Zeeland | 86 | McIntosh County |