612 water systems in Alaska have at least one health-based violation on record. The system with the most health-based violations is Tatitlek Water System in Tatitlek with 183 health-based violations. Health-based violations mean a system exceeded an EPA maximum contaminant level or failed required treatment standards.
| Water System | City | Population | Health Violations | Total Violations |
|---|
| Tatitlek Water System |
Tatitlek | 95 |
183 | 541 |
| Unalakleet City Water Supply |
Unalakleet | 757 |
174 | 646 |
| Kwethluk New Piped Water System |
Kwethluk | 760 |
165 | 1,570 |
| Kotzebue Mun. Water System |
Kotzebue | 3,234 |
132 | 138 |
| Buckland Water System |
Buckland | 600 |
128 | 344 |
| Kake Municipal Water |
Kake | 415 |
128 | 327 |
| Deering Utility System |
Deering | 160 |
127 | 331 |
| Vallenar View Mobile Home Park |
Anchorage | 225 |
115 | 408 |
| Grayling Water System |
Grayling | 207 |
113 | 2,197 |
| Diomede Joint Utilities |
Diomide | 83 |
109 | 1,021 |
| City of Thorne Bay |
Thorne Bay | 470 |
106 | 375 |
| Kivalina Water System |
Kivalina | 452 |
104 | 273 |
| Chalkyitsik Village Water |
Chalkyitsik | 76 |
89 | 395 |
| Galena Wtp1 - City |
Galena | 490 |
80 | 120 |
| Kb Sub. Water Service Assoc. |
Soldotna | 170 |
78 | 304 |
| Nunam Iqua Water System |
Nunam Iqua | 213 |
75 | 892 |
| Hydaburg |
Hydaburg | 415 |
75 | 562 |
| Wales Water System |
Wales | 173 |
68 | 831 |
| Klawock |
Klawock | 904 |
64 | 282 |
| Gulkana Village |
Gulkana | 54 |
63 | 212 |
| Selawik Safewater Facility |
Selawik | 846 |
61 | 383 |
| Metlakatla |
Metlakatla | 1,575 |
61 | 150 |
| Clover Pass Resort |
Ketchikan | 133 |
60 | 108 |
| Native Village of Sleetmute |
Anchorage | 82 |
57 | 652 |
| Kokhanok Water & Ww System |
Kokhanok | 160 |
57 | 611 |
| Saxman |
Ketchikan | 450 |
56 | 223 |
| Kobuk Water System |
Kobuk | 93 |
54 | 274 |
| Kongiganak Water System |
Kongiganak | 547 |
52 | 981 |
| Chenega |
Anchorage | 50 |
51 | 902 |
| Old Harbor |
Old Harbor | 246 |
48 | 396 |
| Angoon Public Water |
Angoon | 450 |
42 | 752 |
| Emmonak Water System |
Emmonak | 820 |
42 | 587 |
| Bluff View Acres Water System |
Wasilla | 100 |
41 | 88 |
| Kasaan |
Kasaan | 46 |
39 | 219 |
| Kotlik Water System |
Anchorage | 617 |
38 | 361 |
| Mcgrath Water System |
Mcgrath | 341 |
37 | 153 |
| Nondalton |
Nondalton | 205 |
35 | 933 |
| Quinhagak Water System |
Quinhagak | 724 |
35 | 307 |
| Yksd - Allakaket School |
Fairbanks | 52 |
35 | 262 |
| Haines Ferry Terminal |
Haines | 104 |
35 | 153 |
| Scammon Bay Water System |
Scammon Bay | 637 |
34 | 626 |
| Shishmaref Water System |
Shishmaref | 572 |
34 | 206 |
| Bering St Sd - Teller Sc/Wash |
Teller | 295 |
31 | 552 |
| Port Lions |
Port Lions | 175 |
31 | 143 |
| Badami - Savant |
Anchorage | 84 |
30 | 254 |
| Tuntutuliak Washeteria and Watering Pt |
Tuntutuliak | 350 |
29 | 381 |
| Port Protection |
Ketchikan | 60 |
28 | 102 |
| Coffman Cove |
Coffman Cove | 199 |
28 | 93 |
| Silverking Lodge |
Ketchikan | 46 |
28 | 83 |
| Golovin Community Water System |
Golovin | 150 |
27 | 420 |
| Lksd Mekoryuk Nunivaarmiut SC |
Bethel | 67 |
26 | 105 |
| Chignik Bay Water System |
Chignik Bay | 199 |
25 | 205 |
| Sheena May Estates |
Wasilla | 74 |
24 | 39 |
| Bethel-City S/D Water |
Bethel | 1,660 |
23 | 95 |
| Hecla Greens Creek 920 Level |
Juneau | 175 |
23 | 49 |
| Kachemak Selo #3 |
Homer | 150 |
22 | 342 |
| Set Free Alaska Snodgrass |
Wasilla | 47 |
22 | 263 |
| Mountain Village Water System |
Mountain Village | 850 |
21 | 869 |
| Ksd Upper Kalskag Primary School |
Aniak | 50 |
21 | 678 |
| Too'gha Inc - in Tanana |
Tanana | 271 |
21 | 368 |
| Manokotak Water System |
Manokotak | 293 |
20 | 581 |
| Quiet Circle Apartments |
Wasilla | 90 |
20 | 35 |
| Gambell Water System |
Gambell | 669 |
19 | 298 |
| Adak Utilities |
Adak | 325 |
19 | 181 |
| Meadow Brook Subdivision |
Big Lake | 465 |
19 | 49 |
| Nanwalek |
Nanwalek | 281 |
18 | 597 |
| Shaktoolik Water System |
Shaktoolik | 270 |
18 | 253 |
| New Stuyahok Water System |
New Stuyahok | 566 |
18 | 190 |
| Brevig Mission Water System |
Brevig Mission | 442 |
18 | 125 |
| Minto Community Water System |
Minto | 205 |
17 | 666 |
| Old Kasigluk - Akiuk |
Kasigluk | 240 |
17 | 240 |
| Koyuk Public Water System |
Koyuk | 277 |
17 | 187 |
| Elim Water Supply |
Elim | 320 |
17 | 93 |
| Nightmute New Watering Point |
Nightmute | 243 |
16 | 485 |
| St. Marys Water System |
Saint Mary's | 548 |
16 | 253 |
| Whalers Cove Lodge |
Angoon | 65 |
16 | 181 |
| Health Quest Therapy Inc |
Wasilla | 133 |
16 | 70 |
| Wrangell |
Wrangell | 2,300 |
16 | 37 |
| Point Higgins Elementary School |
Ketchikan | 300 |
16 | 29 |
| Naabia Niign Northway |
Northway | 25 |
16 | 22 |
| Port Alexander Pws |
Port Alexander | 95 |
15 | 323 |
| George Inlet Lodge |
Ketchikan | 49 |
15 | 110 |
| South Port Condominiums |
Big Lake | 183 |
15 | 15 |
| Alakanuk Water System |
Alakanuk | 570 |
14 | 1,510 |
| Atmautluak Water System |
Atmautluak | 311 |
14 | 373 |
| Koyukuk Safewater Facility |
Koyukuk | 85 |
14 | 244 |
| Twin Hills Water System |
Twin Hills | 87 |
14 | 146 |
| Kaltag Public Water System |
Kaltag | 214 |
14 | 107 |
| South Tongass Water Utility |
Ketchikan | 975 |
14 | 31 |
| Sand Point Water System |
Sandpoint | 830 |
13 | 126 |
| Bethel Heights Water System |
Bethel | 2,228 |
13 | 112 |
| Nunapitchuk Water System |
Nunapitchuk | 496 |
13 | 89 |
| Snowshoe Water System |
Anchorage | 180 |
13 | 52 |
| Unified Alaskan Utilities Sherwood Estat |
Anchorage | 147 |
13 | 36 |
| University of Alaska - Fairbanks |
Fairbanks | 6,200 |
13 | 27 |
| Hughes Public Water Supply |
Hughes | 107 |
12 | 372 |
| Shageluk Water System |
Shageluk | 60 |
12 | 325 |
| Prudhoe Bay Hotel |
Deadhorse | 260 |
12 | 182 |
| Chignik Lagoon Water System |
Chignik Lagoon | 273 |
12 | 168 |
| Great Alaska Adventures |
Cooper Landing | 25 |
12 | 168 |