Data: EPA SDWIS, NWS, State plumbing boards, Rewiring America Last verified: 2026-06-03

North Dakota carries a below-average water safety grade, with violations documented across multiple regions.

Score Distribution

How North Dakota's 407 ZIP codes are distributed across safety grades.

Top 10 Safest ZIP Codes in North Dakota

Highest Home Safety Scores in the state.

10 Lowest-Scoring ZIP Codes in North Dakota

County Rankings

Water quality breakdown by county. 52 counties with data in North Dakota.

Most Common Contaminants in North Dakota

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Overview

We track water quality, weather alerts, plumbing regulations, and energy rebates for 407 ZIP codes across North Dakota, covering 288 community water systems that serve approximately 598,099 people.

119 of 407 ZIP codes (29%) have recorded EPA violations. 30 health-based violations have been documented.

Plumbing Regulations

North Dakota follows the International Plumbing Code (2018 edition).

• Plumbing code: IPC (2018)
• Homeowner DIY: Allowed with permit
• Water heater permit: Required
• Annual backflow test: Required

Full North Dakota regulations →

Areas with Most Violations

Areas with No Violations

Home Safety Score

Average Home Safety Score for North Dakota: C (56/100)

Lead & Copper

• Average lead level (90th percentile): 0.0035 mg/L (EPA action level: 0.015 mg/L)
• 1 ZIP code exceed the EPA lead action level

Radon Risk

• High risk (Zone 1): 400 ZIP codes (98%)
• Moderate risk (Zone 2): 0 ZIP codes
• Low risk (Zone 3): 0 ZIP codes

ZIP Code Reports for North Dakota

Largest Communities

Lowest Safety Scores

Highest Safety Scores

All 407 ZIP Codes in North Dakota

• 58001 (Abercrombie) [C] — 4 violations
• 58002 (Absaraka) [D]
• 58210 (Adams) [D]
• 58310 (Agate) [D]
• 58830 (Alamo) [D]
• 58831 (Alexander) [C] — 1 violation
• 58520 (Almont) [D] — 10 violations
• 58311 (Alsen) [D]
• 58833 (Ambrose) [D]
• 58004 (Amenia) [C] — 4 violations
• 58620 (Amidon) [D]
• 58710 (Anamoose) [D]
• 58212 (Aneta) [B]
• 58711 (Antler) [D]
• 58005 (Argusville) [C]
• 58835 (Arnegard) [C]
• 58006 (Arthur) [D]
• 58214 (Arvilla) [B]
• 58413 (Ashley) [B] — 1 violation
• 58007 (Ayr) [D]
• 58521 (Baldwin) [D]
• 58712 (Balfour) [D]
• 58313 (Balta) [D]
• 58713 (Bantry) [D]
• 58008 (Barney) [C]
• 58216 (Bathgate) [D]
• 58621 (Beach) [B]
• 58316 (Belcourt) [D]
• 58622 (Belfield) [C]
• 58716 (Benedict) [D]
• 58415 (Berlin) [A]
• 58718 (Berthold) [C] — 3 violations
• 58523 (Beulah) [C]
• 58416 (Binford) [C] — 2 violations
• 58317 (Bisbee) [C] — 3 violations
• 58501 (Bismarck) [C]
• 58502 (Bismarck) [C]
• 58503 (Bismarck) [D]
• 58504 (Bismarck) [D]
• 58505 (Bismarck) [C]
• 58506 (Bismarck) [C]
• 58507 (Bismarck) [C]
• 58009 (Blanchard) [D]
• 58318 (Bottineau) [B]
• 58721 (Bowbells) [C]
• 58418 (Bowdon) [D] — 2 violations
• 58623 (Bowman) [C] — 1 violation
• 58524 (Braddock) [D]
• 58321 (Brocket) [D]
• 58420 (Buchanan) [D]
• 58011 (Buffalo) [C] — 2 violations
• 58722 (Burlington) [C]
• 58723 (Butte) [D]
• 58218 (Buxton) [D]
• 58219 (Caledonia) [D]
• 58323 (Calvin) [D]
• 58324 (Cando) [C]
• 58528 (Cannon Ball) [D]
• 58725 (Carpio) [D]
• 58421 (Carrington) [D] — 1 violation
• 58529 (Carson) [C] — 2 violations
• 58838 (Cartwright) [D]
• 58012 (Casselton) [D]
• 58422 (Cathay) [D] — 20 violations ⚠
• 58220 (Cavalier) [C] — 1 violation
• 58013 (Cayuga) [D]
• 58530 (Center) [C] — 3 violations
• 58423 (Chaseley) [D]
• 58015 (Christine) [C] — 1 violation
• 58325 (Churchs Ferry) [F]
• 58424 (Cleveland) [B]
• 58016 (Clifford) [D]
• 58017 (Cogswell) [D]
• 58531 (Coleharbor) [C] — 5 violations
• 58018 (Colfax) [B]
• 58727 (Columbus) [C]
• 58425 (Cooperstown) [B]
• 58426 (Courtenay) [D]
• 58327 (Crary) [D]
• 58730 (Crosby) [C]
• 58222 (Crystal) [D]
• 58223 (Cummings) [D]
• 58224 (Dahlen) [D]
• 58021 (Davenport) [C] — 3 violations ⚠
• 58428 (Dawson) [D]
• 58429 (Dazey) [C] — 2 violations
• 58731 (Deering) [D]
• 58430 (Denhoff) [D]
• 58733 (Des Lacs) [D]
• 58301 (Devils Lake) [C]
• 58431 (Dickey) [C]
• 58601 (Dickinson) [C]
• 58602 (Dickinson) [C]
• 58625 (Dodge) [C]
• 58734 (Donnybrook) [D]
• 58735 (Douglas) [D]
• 58736 (Drake) [D]
• 58225 (Drayton) [D] — 1 violation
• 58532 (Driscoll) [D]
• 58626 (Dunn Center) [C] — 3 violations
• 58329 (Dunseith) [C] — 4 violations ⚠
• 58433 (Edgeley) [B] — 5 violations
• 58227 (Edinburg) [D]
• 58330 (Edmore) [B]
• 58331 (Egeland) [D]
• 58533 (Elgin) [C] — 1 violation
• 58436 (Ellendale) [C] — 1 violation ⚠
• 58228 (Emerado) [D] — 6 violations
• 58027 (Enderlin) [B]
• 58843 (Epping) [D]
• 58029 (Erie) [D]
• 58332 (Esmond) [D]
• 58229 (Fairdale) [D]
• 58627 (Fairfield) [D]
• 58030 (Fairmount) [C] — 2 violations
• 58102 (Fargo) [C]
• 58103 (Fargo) [C]
• 58104 (Fargo) [D]
• 58105 (Fargo) [B]
• 58106 (Fargo) [C]
• 58107 (Fargo) [C]
• 58108 (Fargo) [B]
• 58109 (Fargo) [B]
• 58121 (Fargo) [B]
• 58122 (Fargo) [C]
• 58124 (Fargo) [B]
• 58125 (Fargo) [C]
• 58126 (Fargo) [C]
• 58438 (Fessenden) [B]
• 58031 (Fingal) [D]
• 58230 (Finley) [C]
• 58535 (Flasher) [B]
• 58737 (Flaxton) [C] — 11 violations ⚠
• 58439 (Forbes) [C] — 17 violations ⚠
• 58231 (Fordville) [C] — 1 violation
• 58233 (Forest River) [D]
• 58032 (Forman) [D] — 3 violations
• 58033 (Fort Ransom) [D]
• 58335 (Fort Totten) [D]
• 58538 (Fort Yates) [D]
• 58844 (Fortuna) [C] — 5 violations ⚠
• 58440 (Fredonia) [D]
• 58441 (Fullerton) [C] — 2 violations
• 58442 (Gackle) [B]
• 58035 (Galesburg) [D]
• 58036 (Gardner) [C] — 3 violations
• 58540 (Garrison) [C] — 1 violation
• 58235 (Gilby) [C]
• 58630 (Gladstone) [D] — 2 violations
• 58236 (Glasston) [D]
• 58631 (Glen Ullin) [C]
• 58740 (Glenburn) [C] — 2 violations
• 58443 (Glenfield) [B]
• 58541 (Golden Valley) [C]
• 58632 (Golva) [D] — 4 violations
• 58444 (Goodrich) [C] — 5 violations ⚠
• 58445 (Grace City) [D]
• 58237 (Grafton) [D]
• 58201 (Grand Forks) [D]
• 58202 (Grand Forks) [C]
• 58203 (Grand Forks) [D]
• 58206 (Grand Forks) [C]
• 58207 (Grand Forks) [C]
• 58208 (Grand Forks) [C]
• 58204 (Grand Forks Afb) [D]
• 58205 (Grand Forks Afb) [D]
• 58038 (Grandin) [C] — 4 violations
• 58741 (Granville) [C] — 4 violations
• 58634 (Grassy Butte) [D]
• 58845 (Grenora) [C]
• 58040 (Gwinner) [C]
• 58542 (Hague) [B]
• 58636 (Halliday) [C]
• 58238 (Hamilton) [D]
• 58338 (Hampden) [D]
• 58041 (Hankinson) [B]
• 58448 (Hannaford) [C] — 2 violations
• 58239 (Hannah) [D]
• 58339 (Hansboro) [D]
• 58341 (Harvey) [D]
• 58042 (Harwood) [D] — 1 violation
• 58240 (Hatton) [C] — 2 violations
• 58043 (Havana) [D]
• 58544 (Hazelton) [C] — 3 violations
• 58545 (Hazen) [B]
• 58638 (Hebron) [C] — 1 violation
• 58241 (Hensel) [D]
• 58639 (Hettinger) [C]
• 58045 (Hillsboro) [C] — 3 violations
• 58243 (Hoople) [D]
• 58046 (Hope) [C]
• 58047 (Horace) [D] — 3 violations
• 58048 (Hunter) [C] — 3 violations
• 58451 (Hurdsfield) [D]
• 58244 (Inkster) [D]
• 58401 (Jamestown) [D]
• 58402 (Jamestown) [C]
• 58405 (Jamestown) [C]
• 58452 (Jessie) [D]
• 58454 (Jud) [C] — 4 violations
• 58744 (Karlsruhe) [C] — 3 violations
• 58049 (Kathryn) [D]
• 58847 (Keene) [D]
• 58746 (Kenmare) [C] — 3 violations
• 58455 (Kensal) [D] — 2 violations ⚠
• 58640 (Killdeer) [C]
• 58051 (Kindred) [C]
• 58549 (Kintyre) [D]
• 58343 (Knox) [D]
• 58748 (Kramer) [D]
• 58456 (Kulm) [A]
• 58344 (Lakota) [C] — 4 violations
• 58458 (Lamoure) [A] — 2 violations
• 58249 (Langdon) [C] — 3 violations
• 58250 (Lankin) [D]
• 58750 (Lansford) [C]
• 58251 (Larimore) [B] — 1 violation
• 58345 (Lawton) [D]
• 58346 (Leeds) [B]
• 58641 (Lefor) [D]
• 58460 (Lehr) [C]
• 58052 (Leonard) [D]
• 58053 (Lidgerwood) [C] — 2 violations
• 58752 (Lignite) [C]
• 58552 (Linton) [D]
• 58054 (Lisbon) [D] — 1 violation
• 58461 (Litchville) [C]
• 58056 (Luverne) [D]
• 58348 (Maddock) [C]
• 58255 (Maida) [D]
• 58756 (Makoti) [C] — 2 violations
• 58554 (Mandan) [C] — 1 violation
• 58757 (Mandaree) [D]
• 58642 (Manning) [D] — 3 violations
• 58058 (Mantador) [C]
• 58256 (Manvel) [D]
• 58059 (Mapleton) [C]
• 58466 (Marion) [D]
• 58643 (Marmarth) [C]
• 58644 (Marshall) [D]
• 58758 (Martin) [D]
• 58759 (Max) [C]
• 58760 (Maxbass) [F] — 12 violations ⚠
• 58257 (Mayville) [D]
• 58463 (Mcclusky) [C] — 1 violation
• 58755 (Mcgregor) [D]
• 58464 (Mchenry) [D]
• 58057 (Mcleod) [D]
• 58254 (Mcville) [B]
• 58467 (Medina) [B]
• 58645 (Medora) [C] — 2 violations
• 58258 (Mekinock) [D]
• 58558 (Menoken) [B]
• 58559 (Mercer) [C] — 10 violations
• 58259 (Michigan) [B]
• 58060 (Milnor) [C] — 7 violations ⚠
• 58260 (Milton) [B]
• 58351 (Minnewaukan) [D] — 1 violation
• 58701 (Minot) [F] — 2 violations
• 58702 (Minot) [D] — 2 violations
• 58703 (Minot) [F] — 2 violations
• 58707 (Minot) [D] — 2 violations
• 58704 (Minot Afb) [D]
• 58705 (Minot Afb) [D]
• 58261 (Minto) [C]
• 58560 (Moffit) [D]
• 58761 (Mohall) [C]
• 58472 (Montpelier) [B]
• 58061 (Mooreton) [B]
• 58646 (Mott) [D]
• 58262 (Mountain) [C] — 3 violations
• 58352 (Munich) [D]
• 58353 (Mylo) [D]
• 58561 (Napoleon) [B]
• 58265 (Neche) [C]
• 58355 (Nekoma) [C] — 2 violations
• 58647 (New England) [C] — 1 violation
• 58562 (New Leipzig) [C] — 1 violation
• 58356 (New Rockford) [C] — 3 violations
• 58563 (New Salem) [B]
• 58763 (New Town) [D]
• 58762 (Newburg) [D]
• 58266 (Niagara) [D]
• 58062 (Nome) [C]
• 58765 (Noonan) [D] — 2 violations
• 58267 (Northwood) [C] — 3 violations
• 58768 (Norwich) [D]
• 58474 (Oakes) [C] — 1 violation
• 58357 (Oberon) [C] — 24 violations ⚠
• 58063 (Oriska) [C]
• 58269 (Osnabrock) [C]
• 58064 (Page) [C]
• 58769 (Palermo) [D]
• 58270 (Park River) [C]
• 58770 (Parshall) [D]
• 58361 (Pekin) [D]
• 58271 (Pembina) [D] — 2 violations
• 58362 (Penn) [D]
• 58363 (Perth) [D]
• 58272 (Petersburg) [C]
• 58475 (Pettibone) [D]
• 58065 (Pillsbury) [D]
• 58476 (Pingree) [D]
• 58273 (Pisek) [D]
• 58771 (Plaza) [C] — 1 violation
• 58772 (Portal) [C]
• 58274 (Portland) [B]
• 58773 (Powers Lake) [C]
• 58564 (Raleigh) [D]
• 58849 (Ray) [C] — 1 violation
• 58649 (Reeder) [C]
• 58477 (Regan) [D]
• 58650 (Regent) [C] — 8 violations
• 58275 (Reynolds) [D]
• 58651 (Rhame) [C] — 1 violation
• 58652 (Richardton) [C]
• 58565 (Riverdale) [C]
• 58478 (Robinson) [C] — 2 violations
• 58365 (Rocklake) [D]
• 58479 (Rogers) [D]
• 58366 (Rolette) [B]
• 58367 (Rolla) [C] — 1 violation
• 58775 (Roseglen) [D]
• 58776 (Ross) [C] — 11 violations
• 58368 (Rugby) [C] — 2 violations
• 58778 (Ruso) [D]
• 58067 (Rutland) [C]
• 58779 (Ryder) [B] — 1 violation
• 58566 (Saint Anthony) [D]
• 58369 (Saint John) [D]
• 58370 (Saint Michael) [D]
• 58276 (Saint Thomas) [D]
• 58480 (Sanborn) [C]
• 58372 (Sarles) [D]
• 58781 (Sawyer) [C] — 1 violation
• 58653 (Scranton) [C]
• 58568 (Selfridge) [D]
• 58654 (Sentinel Butte) [B]
• 58277 (Sharon) [C]
• 58068 (Sheldon) [C] — 1 violation
• 58782 (Sherwood) [B]
• 58374 (Sheyenne) [C] — 3 violations
• 58569 (Shields) [D]
• 58570 (Solen) [D]
• 58783 (Souris) [C] — 1 violation ⚠
• 58655 (South Heart) [C] — 1 violation
• 58481 (Spiritwood) [D]
• 58784 (Stanley) [B]
• 58571 (Stanton) [C]
• 58377 (Starkweather) [D]
• 58482 (Steele) [C]
• 58572 (Sterling) [D]
• 58069 (Stirum) [D]
• 58573 (Strasburg) [C] — 12 violations
• 58483 (Streeter) [C]
• 58785 (Surrey) [D] — 2 violations
• 58484 (Sutton) [D]
• 58486 (Sykeston) [C] — 5 violations
• 58487 (Tappen) [D]
• 58656 (Taylor) [C] — 4 violations
• 58278 (Thompson) [C] — 2 violations
• 58852 (Tioga) [C]
• 58379 (Tokio) [D]
• 58787 (Tolley) [D]
• 58380 (Tolna) [C] — 4 violations
• 58071 (Tower City) [C]
• 58788 (Towner) [C] — 5 violations ⚠
• 58853 (Trenton) [C] — 2 violations
• 58575 (Turtle Lake) [C]
• 58488 (Tuttle) [D]
• 58576 (Underwood) [B] — 1 violation
• 58789 (Upham) [C]
• 58072 (Valley City) [D] — 3 violations
• 58790 (Velva) [D] — 2 violations
• 58490 (Verona) [A] — 1 violation
• 58792 (Voltaire) [D]
• 58074 (Wahpeton) [C]
• 58075 (Wahpeton) [C]
• 58076 (Wahpeton) [C]
• 58077 (Walcott) [B] — 1 violation
• 58281 (Wales) [D]
• 58282 (Walhalla) [B]
• 58381 (Warwick) [D]
• 58577 (Washburn) [C]
• 58854 (Watford City) [C] — 12 violations ⚠
• 58382 (Webster) [D]
• 58078 (West Fargo) [D]
• 58793 (Westhope) [C] — 2 violations
• 58079 (Wheatland) [D]
• 58794 (White Earth) [D]
• 58795 (Wildrose) [C]
• 58801 (Williston) [C] — 2 violations
• 58802 (Williston) [C] — 2 violations
• 58803 (Williston) [C] — 2 violations
• 58384 (Willow City) [C]
• 58579 (Wilton) [D] — 1 violation
• 58492 (Wimbledon) [B]
• 58494 (Wing) [C] — 2 violations
• 58495 (Wishek) [C]
• 58385 (Wolford) [D]
• 58496 (Woodworth) [B]
• 58081 (Wyndmere) [C]
• 58386 (York) [D]
• 58497 (Ypsilanti) [D]
• 58856 (Zahl) [D]
• 58580 (Zap) [B] — 1 violation
• 58581 (Zeeland) [C] — 2 violations

Data Sources

• Water quality: EPA Safe Drinking Water Information System (SDWIS)
• Regulations: State plumbing boards, ICC, IAPMO

Updated daily.

Frequently Asked Questions

Is the water safe to drink in North Dakota?

North Dakota has 288 community water systems serving 598,099 people across 407 ZIP codes. There are 395 recorded violations, including 30 health-based. 119 of 407 ZIP codes have at least one violation.

What plumbing code does North Dakota follow?

North Dakota follows the IPC plumbing code. DIY plumbing work is allowed for homeowners.

Is lead a concern in North Dakota's drinking water?

1 ZIP code in North Dakota has lead levels exceeding the EPA action level of 0.015 mg/L.

What is the radon risk in North Dakota?

98% of ZIP codes in North Dakota fall in EPA Radon Zone 1 (highest risk).