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

If statewide compliance data is your starting point, Alaska offers a solid baseline — monitoring records across utility districts show strong adherence to federal standards, with health-based violations limited to a small share of the state's water systems.

Score Distribution

How Alaska's 274 ZIP codes are distributed across safety grades.

Top 10 Safest ZIP Codes in Alaska

Highest Home Safety Scores in the state.

10 Lowest-Scoring ZIP Codes in Alaska

County Rankings

Water quality breakdown by county. 31 counties with data in Alaska.

Most Common Contaminants in Alaska

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Overview

We track water quality, weather alerts, plumbing regulations, and energy rebates for 274 ZIP codes across Alaska, covering 245 community water systems that serve approximately 616,345 people.

207 of 274 ZIP codes (76%) have recorded EPA violations. 1173 health-based violations have been documented.

Plumbing Regulations

Alaska follows the Uniform Plumbing Code (2018/2021 edition).

• Plumbing code: UPC (2018/2021)
• Homeowner DIY: Licensed plumber required
• Water heater permit: Required
• Annual backflow test: Required
• Seismic strapping: Required

Full Alaska regulations →

Areas with Most Violations

Areas with No Violations

Home Safety Score

Average Home Safety Score for Alaska: B (75/100)

Lead & Copper

• Average lead level (90th percentile): 0.0032 mg/L (EPA action level: 0.015 mg/L)
• 2 ZIP codes exceed the EPA lead action level

Radon Risk

• High risk (Zone 1): 0 ZIP codes (0%)
• Moderate risk (Zone 2): 42 ZIP codes
• Low risk (Zone 3): 139 ZIP codes

ZIP Code Reports for Alaska

Largest Communities

Lowest Safety Scores

Highest Safety Scores

All 274 ZIP Codes in Alaska

• 99546 (Adak) [C] — 40 violations ⚠
• 99551 (Akiachak) [B] — 14 violations
• 99552 (Akiak) [A] — 5 violations
• 99553 (Akutan) [A] — 149 violations ⚠
• 99554 (Alakanuk) [B] — 102 violations ⚠
• 99555 (Aleknagik) [D]
• 99720 (Allakaket) [A] — 62 violations ⚠
• 99786 (Ambler) [A] — 10 violations ⚠
• 99721 (Anaktuvuk Pass) [A]
• 99556 (Anchor Point) [B] — 3 violations
• 99501 (Anchorage) [B] — 292 violations ⚠
• 99502 (Anchorage) [B] — 292 violations ⚠
• 99503 (Anchorage) [B] — 292 violations ⚠
• 99504 (Anchorage) [C] — 292 violations ⚠
• 99507 (Anchorage) [C] — 292 violations ⚠
• 99508 (Anchorage) [C] — 292 violations ⚠
• 99509 (Anchorage) [C] — 292 violations ⚠
• 99510 (Anchorage) [B] — 292 violations ⚠
• 99511 (Anchorage) [C] — 292 violations ⚠
• 99513 (Anchorage) [C] — 292 violations ⚠
• 99514 (Anchorage) [C] — 292 violations ⚠
• 99515 (Anchorage) [B] — 292 violations ⚠
• 99516 (Anchorage) [B] — 292 violations ⚠
• 99517 (Anchorage) [B] — 292 violations ⚠
• 99518 (Anchorage) [B] — 292 violations ⚠
• 99519 (Anchorage) [B] — 292 violations ⚠
• 99520 (Anchorage) [C] — 292 violations ⚠
• 99521 (Anchorage) [C] — 292 violations ⚠
• 99522 (Anchorage) [C] — 292 violations ⚠
• 99523 (Anchorage) [C] — 292 violations ⚠
• 99524 (Anchorage) [C] — 292 violations ⚠
• 99529 (Anchorage) [C] — 292 violations ⚠
• 99530 (Anchorage) [C] — 292 violations ⚠
• 99599 (Anchorage) [C] — 292 violations ⚠
• 99695 (Anchorage) [C] — 292 violations ⚠
• 99744 (Anderson) [D]
• 99820 (Angoon) [C] — 163 violations ⚠
• 99557 (Aniak) [D]
• 99558 (Anvik) [A] — 71 violations ⚠
• 99722 (Arctic Village) [B] — 96 violations
• 99547 (Atka) [A] — 30 violations ⚠
• 99791 (Atqasuk) [C]
• 99821 (Auke Bay) [D]
• 99723 (Barrow) [A] — 10 violations ⚠
• 99724 (Beaver) [B] — 27 violations
• 99559 (Bethel) [B] — 136 violations ⚠
• 99726 (Bettles Field) [D]
• 99652 (Big Lake) [B] — 12 violations ⚠
• 99785 (Brevig Mission) [A] — 26 violations ⚠
• 99727 (Buckland) [C] — 65 violations ⚠
• 99729 (Cantwell) [D]
• 99730 (Central) [D]
• 99788 (Chalkyitsik) [C] — 140 violations ⚠
• 99561 (Chefornak) [A] — 38 violations ⚠
• 99563 (Chevak) [A] — 17 violations ⚠
• 99732 (Chicken) [D]
• 99564 (Chignik) [D]
• 99565 (Chignik Lagoon) [B] — 29 violations
• 99548 (Chignik Lake) [B] — 49 violations
• 99566 (Chitina) [D]
• 99567 (Chugiak) [A] — 30 violations ⚠
• 99733 (Circle) [B] — 37 violations
• 99568 (Clam Gulch) [D]
• 99569 (Clarks Point) [B] — 24 violations ⚠
• 99704 (Clear) [A] — 3 violations
• 99918 (Coffman Cove) [C] — 23 violations ⚠
• 99571 (Cold Bay) [A] — 3 violations
• 99572 (Cooper Landing) [C]
• 99573 (Copper Center) [B] — 9 violations
• 99574 (Cordova) [B] — 6 violations
• 99921 (Craig) [A] — 2 violations
• 99575 (Crooked Creek) [B] — 75 violations
• 99736 (Deering) [C] — 69 violations ⚠
• 99737 (Delta Junction) [B]
• 99755 (Denali National Park) [D]
• 99576 (Dillingham) [A] — 25 violations ⚠
• 99824 (Douglas) [C]
• 99692 (Dutch Harbor) [D]
• 99738 (Eagle) [B] — 9 violations
• 99577 (Eagle River) [A] — 6 violations
• 99578 (Eek) [A] — 73 violations ⚠
• 99579 (Egegik) [A] — 4 violations ⚠
• 99702 (Eielson Afb) [B] — 5 violations ⚠
• 99580 (Ekwok) [D]
• 99825 (Elfin Cove) [D]
• 99739 (Elim) [A] — 34 violations ⚠
• 99581 (Emmonak) [C] — 74 violations ⚠
• 99725 (Ester) [D]
• 99701 (Fairbanks) [C] — 13 violations ⚠
• 99706 (Fairbanks) [B] — 13 violations ⚠
• 99707 (Fairbanks) [B] — 13 violations ⚠
• 99708 (Fairbanks) [B] — 13 violations ⚠
• 99709 (Fairbanks) [C] — 13 violations ⚠
• 99710 (Fairbanks) [B] — 13 violations ⚠
• 99711 (Fairbanks) [B] — 13 violations ⚠
• 99712 (Fairbanks) [B] — 13 violations ⚠
• 99775 (Fairbanks) [B] — 13 violations ⚠
• 99790 (Fairbanks) [B] — 13 violations ⚠
• 99583 (False Pass) [A] — 7 violations ⚠
• 99731 (Fort Greely) [D]
• 99703 (Fort Wainwright) [B]
• 99740 (Fort Yukon) [B] — 17 violations
• 99586 (Gakona) [D]
• 99741 (Galena) [C] — 45 violations ⚠
• 99742 (Gambell) [A] — 41 violations ⚠
• 99587 (Girdwood) [A] — 2 violations
• 99588 (Glennallen) [B] — 3 violations ⚠
• 99589 (Goodnews Bay) [B] — 50 violations
• 99590 (Grayling) [A]
• 99826 (Gustavus) [D]
• 99827 (Haines) [A] — 32 violations ⚠
• 99743 (Healy) [D]
• 99602 (Holy Cross) [A] — 6 violations ⚠
• 99603 (Homer) [B] — 11 violations
• 99829 (Hoonah) [B] — 3 violations ⚠
• 99604 (Hooper Bay) [B] — 43 violations ⚠
• 99605 (Hope) [D]
• 99694 (Houston) [C]
• 99745 (Hughes) [A] — 126 violations ⚠
• 99746 (Huslia) [B] — 32 violations
• 99922 (Hydaburg) [B] — 83 violations ⚠
• 99923 (Hyder) [D]
• 99606 (Iliamna) [D]
• 99540 (Indian) [D]
• 99505 (Jber) [A]
• 99506 (Jber) [A]
• 99801 (Juneau) [B] — 7 violations ⚠
• 99802 (Juneau) [A] — 7 violations ⚠
• 99803 (Juneau) [A] — 7 violations ⚠
• 99811 (Juneau) [A] — 7 violations ⚠
• 99812 (Juneau) [A] — 7 violations ⚠
• 99850 (Juneau) [A] — 7 violations ⚠
• 99830 (Kake) [F] — 45 violations ⚠
• 99747 (Kaktovik) [A]
• 99607 (Kalskag) [D]
• 99748 (Kaltag) [A] — 27 violations ⚠
• 99608 (Karluk) [A] — 4 violations
• 99609 (Kasigluk) [A] — 88 violations ⚠
• 99610 (Kasilof) [D]
• 99611 (Kenai) [B] — 31 violations ⚠
• 99901 (Ketchikan) [C] — 34 violations ⚠
• 99950 (Ketchikan) [C] — 34 violations ⚠
• 99749 (Kiana) [A] — 7 violations ⚠
• 99612 (King Cove) [A] — 6 violations ⚠
• 99613 (King Salmon) [A] — 2 violations
• 99614 (Kipnuk) [B] — 42 violations
• 99750 (Kivalina) [C] — 66 violations ⚠
• 99925 (Klawock) [C] — 26 violations ⚠
• 99751 (Kobuk) [B] — 48 violations ⚠
• 99615 (Kodiak) [A] — 10 violations ⚠
• 99619 (Kodiak) [A] — 10 violations ⚠
• 99697 (Kodiak) [A] — 10 violations ⚠
• 99545 (Kongiganak) [A] — 125 violations ⚠
• 99620 (Kotlik) [C] — 61 violations ⚠
• 99752 (Kotzebue) [C] — 25 violations ⚠
• 99753 (Koyuk) [A] — 46 violations ⚠
• 99754 (Koyukuk) [B] — 64 violations
• 99621 (Kwethluk) [B] — 62 violations ⚠
• 99622 (Kwigillingok) [B] — 134 violations
• 99757 (Lake Minchumina) [D]
• 99624 (Larsen Bay) [A] — 17 violations ⚠
• 99625 (Levelock) [D]
• 99626 (Lower Kalskag) [D]
• 99756 (Manley Hot Springs) [A] — 1 violation
• 99628 (Manokotak) [A] — 41 violations ⚠
• 99585 (Marshall) [B] — 26 violations ⚠
• 99627 (Mc Grath) [D]
• 99630 (Mekoryuk) [A] — 12 violations ⚠
• 99926 (Metlakatla) [D]
• 99903 (Meyers Chuck) [D]
• 99758 (Minto) [A] — 56 violations ⚠
• 99631 (Moose Pass) [D]
• 99632 (Mountain Village) [B] — 20 violations ⚠
• 99633 (Naknek) [D]
• 99634 (Napakiak) [A] — 17 violations ⚠
• 99760 (Nenana) [A] — 2 violations
• 99636 (New Stuyahok) [A] — 28 violations ⚠
• 99690 (Nightmute) [B] — 31 violations ⚠
• 99635 (Nikiski) [B] — 4 violations ⚠
• 99691 (Nikolai) [D]
• 99638 (Nikolski) [A]
• 99639 (Ninilchik) [C]
• 99761 (Noatak) [B] — 19 violations
• 99762 (Nome) [B] — 6 violations
• 99640 (Nondalton) [A] — 129 violations ⚠
• 99763 (Noorvik) [A] — 27 violations ⚠
• 99705 (North Pole) [B] — 12 violations ⚠
• 99764 (Northway) [C] — 1 violation
• 99789 (Nuiqsut) [A] — 5 violations
• 99765 (Nulato) [A] — 7 violations ⚠
• 99666 (Nunam Iqua) [C] — 167 violations ⚠
• 99641 (Nunapitchuk) [A] — 21 violations ⚠
• 99643 (Old Harbor) [D] — 70 violations ⚠
• 99644 (Ouzinkie) [A] — 6 violations ⚠
• 99645 (Palmer) [B] — 3 violations
• 99647 (Pedro Bay) [D]
• 99832 (Pelican) [B] — 30 violations
• 99648 (Perryville) [B] — 45 violations
• 99833 (Petersburg) [A] — 3 violations
• 99649 (Pilot Point) [D]
• 99650 (Pilot Station) [B] — 17 violations
• 99651 (Platinum) [B] — 50 violations
• 99927 (Point Baker) [D]
• 99766 (Point Hope) [D]
• 99759 (Point Lay) [D]
• 99836 (Port Alexander) [B] — 66 violations ⚠
• 99653 (Port Alsworth) [D]
• 99549 (Port Heiden) [D]
• 99550 (Port Lions) [B] — 28 violations ⚠
• 99734 (Prudhoe Bay) [D]
• 99655 (Quinhagak) [A] — 37 violations ⚠
• 99767 (Rampart) [A] — 52 violations ⚠
• 99656 (Red Devil) [D]
• 99768 (Ruby) [B] — 45 violations
• 99657 (Russian Mission) [A] — 18 violations ⚠
• 99591 (Saint George Island) [D]
• 99658 (Saint Marys) [B] — 46 violations ⚠
• 99659 (Saint Michael) [A] — 24 violations ⚠
• 99660 (Saint Paul Island) [D]
• 99714 (Salcha) [B] — 18 violations ⚠
• 99661 (Sand Point) [A] — 21 violations ⚠
• 99769 (Savoonga) [A] — 14 violations
• 99662 (Scammon Bay) [C] — 119 violations ⚠
• 99770 (Selawik) [B] — 92 violations ⚠
• 99663 (Seldovia) [B] — 22 violations ⚠
• 99664 (Seward) [C] — 51 violations ⚠
• 99665 (Shageluk) [A] — 79 violations ⚠
• 99771 (Shaktoolik) [A] — 91 violations ⚠
• 99772 (Shishmaref) [A] — 43 violations ⚠
• 99773 (Shungnak) [A] — 47 violations ⚠
• 99835 (Sitka) [C]
• 99840 (Skagway) [A] — 3 violations
• 99667 (Skwentna) [C]
• 99668 (Sleetmute) [B] — 147 violations ⚠
• 99669 (Soldotna) [D] — 103 violations ⚠
• 99670 (South Naknek) [A] — 15 violations ⚠
• 99671 (Stebbins) [A] — 27 violations
• 99672 (Sterling) [B] — 19 violations ⚠
• 99774 (Stevens Village) [A] — 52 violations ⚠
• 99674 (Sutton) [B] — 3 violations
• 99675 (Takotna) [B] — 144 violations
• 99676 (Talkeetna) [B]
• 99776 (Tanacross) [B] — 35 violations ⚠
• 99777 (Tanana) [B] — 101 violations ⚠
• 99677 (Tatitlek) [F] — 107 violations ⚠
• 99778 (Teller) [B] — 89 violations ⚠
• 99841 (Tenakee Springs) [D]
• 99919 (Thorne Bay) [D] — 28 violations ⚠
• 99678 (Togiak) [A] — 2 violations
• 99779 (Tok) [B] — 5 violations
• 99780 (Tok) [B] — 5 violations
• 99637 (Toksook Bay) [A] — 6 violations
• 99683 (Trapper Creek) [B]
• 99679 (Tuluksak) [A] — 67 violations ⚠
• 99680 (Tuntutuliak) [A] — 57 violations ⚠
• 99681 (Tununak) [A] — 82 violations ⚠
• 99716 (Two Rivers) [B]
• 99682 (Tyonek) [B] — 11 violations
• 99684 (Unalakleet) [F] — 106 violations ⚠
• 99685 (Unalaska) [A] — 11 violations
• 99686 (Valdez) [A]
• 99781 (Venetie) [A] — 71 violations ⚠
• 99782 (Wainwright) [A] — 5 violations
• 99783 (Wales) [B] — 39 violations ⚠
• 99928 (Ward Cove) [C] — 12 violations
• 99623 (Wasilla) [B] — 14 violations ⚠
• 99629 (Wasilla) [B] — 14 violations ⚠
• 99654 (Wasilla) [B] — 14 violations ⚠
• 99687 (Wasilla) [B] — 14 violations ⚠
• 99784 (White Mountain) [A] — 4 violations ⚠
• 99693 (Whittier) [A] — 1 violation
• 99688 (Willow) [D]
• 99929 (Wrangell) [B] — 6 violations ⚠
• 99689 (Yakutat) [B] — 14 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 Alaska?

Alaska has 245 community water systems serving 616,345 people across 274 ZIP codes. There are 14,004 recorded violations, including 1173 health-based. 207 of 274 ZIP codes have at least one violation.

What plumbing code does Alaska follow?

Alaska follows the UPC plumbing code. A licensed plumber is generally required for plumbing work.

Is lead a concern in Alaska's drinking water?

2 ZIP codes in Alaska have lead levels exceeding the EPA action level of 0.015 mg/L.