Water Quality in Alaska
405 water systems • 157 cities • EPA SDWIS Data
405
Water Systems
73,527
Total Violations
5,020
Health-Based Violations
699,435
Population Served
Overview
Alaska has 405 active community water systems serving 699,435 people. These systems have accumulated 73,527 EPA Safe Drinking Water Act violations on record, of which 5,020 are health-based violations (meaning a contaminant exceeded safe levels).
Common contaminants found in violations: E. coli, Chlorine Dioxide, Gross Alpha, Fecal Coliform, Stage 2 DBP, Total Coliform (TCR), Nitrate, TTHM, Total Haloacetic Acids (HAA5), Disinfection Byproducts.
Cities with Most Violations in Alaska
| # | City | Violations | Health-Based | Water Systems | Population |
|---|---|---|---|---|---|
| 1 | Anchorage | 6,388 | 382 | 87 | 249,201 |
| 2 | Grayling | 2,197 | 113 | 1 | 207 |
| 3 | Kwethluk | 1,570 | 165 | 1 | 760 |
| 4 | Chugiak | 1,544 | 7 | 7 | 526 |
| 5 | Alakanuk | 1,510 | 14 | 1 | 570 |
| 6 | Bethel | 1,340 | 66 | 8 | 6,246 |
| 7 | Kwigillingok | 1,184 | 6 | 1 | 400 |
| 8 | Manokotak | 1,177 | 31 | 2 | 508 |
| 9 | Newtok | 1,141 | 0 | 1 | 170 |
| 10 | Kongiganak | 981 | 52 | 1 | 547 |
Largest Cities in Alaska
All Cities in Alaska
| City | Population | Violations | Health Violations | Contaminants |
|---|---|---|---|---|
| Anchorage | 249,201 | 6,388 | 382 | Barium, Bromate, Chlorine +9 more |
| Fairbanks | 160,103 | 347 | 48 | Chlorine Dioxide, Disinfection Byproducts, Stage 2 DBP +2 more |
| Juneau | 38,776 | 92 | 2 | E. coli |
| Jber | 30,003 | 22 | 0 | |
| Wasilla | 23,748 | 912 | 138 | Barium, Chlorine, Chlorine Dioxide +3 more |
| Kodiak | 12,639 | 60 | 9 | Chlorine Dioxide, Fecal Coliform |
| Palmer | 12,464 | 315 | 16 | Chlorine Dioxide, Stage 2 DBP |
| Skagway | 10,947 | 97 | 10 | Chlorine Dioxide, Gross Alpha |
| Ketchikan | 10,422 | 367 | 106 | Disinfection Byproducts, E. coli, Fecal Coliform +3 more |
| Eielson Afb | 9,760 | 26 | 1 | Stage 2 DBP |
| Sitka | 9,448 | 23 | 5 | Fecal Coliform |
| Unalaska | 9,400 | 37 | 0 | |
| Homer | 7,358 | 372 | 22 | E. coli, Gross Alpha |
| Bethel | 6,246 | 1,340 | 66 | Chlorine Dioxide, E. coli, Fecal Coliform +3 more |
| Kenai | 6,040 | 830 | 10 | Chlorine Dioxide, Stage 2 DBP |
| Valdez | 5,639 | 43 | 0 | |
| Barrow | 5,538 | 36 | 1 | Fecal Coliform |
| Soldotna | 5,313 | 942 | 102 | Barium, Chlorine Dioxide, Disinfection Byproducts +1 more |
| Nome | 4,220 | 52 | 2 | Chlorine Dioxide |
| North Pole | 4,077 | 40 | 2 | Chlorine Dioxide, Stage 2 DBP |
| Seward | 3,869 | 184 | 2 | Stage 2 DBP |
| Kotzebue | 3,234 | 138 | 132 | E. coli, Fecal Coliform, TTHM +1 more |
| Petersburg | 3,218 | 10 | 0 | |
| Big Lake | 3,051 | 495 | 25 | Barium, Chlorine Dioxide |
| Dillingham | 2,786 | 613 | 9 | Chlorine Dioxide |
| Cordova | 2,700 | 30 | 3 | Fecal Coliform, Total Haloacetic Acids (HAA5) |
| Haines | 2,489 | 178 | 19 | E. coli, Fecal Coliform, Gross Alpha +1 more |
| Wrangell | 2,300 | 37 | 16 | Fecal Coliform, Stage 2 DBP, TTHM +1 more |
| Craig | 1,475 | 57 | 12 | E. coli, Fecal Coliform, TTHM +1 more |
| Hooper Bay | 1,200 | 241 | 8 | Chlorine Dioxide, Stage 2 DBP |
| Anchor Point | 1,000 | 113 | 3 | Chlorine Dioxide |
| Hoonah | 980 | 42 | 12 | E. coli, Fecal Coliform, Total Haloacetic Acids (HAA5) |
| Chevak | 938 | 80 | 3 | Chlorine Dioxide, Stage 2 DBP |
| Togiak | 910 | 8 | 0 | |
| Klawock | 904 | 282 | 64 | Fecal Coliform, TTHM, Total Haloacetic Acids (HAA5) |
| Mountain Village | 850 | 869 | 21 | Chlorine Dioxide, Gross Alpha |
| Selawik | 846 | 383 | 61 | E. coli, Fecal Coliform, Stage 2 DBP +1 more |
| Sandpoint | 830 | 126 | 13 | Chlorine Dioxide, E. coli, Fecal Coliform |
| Emmonak | 820 | 587 | 42 | Contaminant 2920, E. coli, Stage 2 DBP +1 more |
| Savoonga | 802 | 129 | 2 | TTHM |
| Galena | 780 | 168 | 80 | Chlorine Dioxide, Disinfection Byproducts, Gross Alpha +2 more |
| Kwethluk | 760 | 1,570 | 165 | Contaminant 2920, E. coli, Fecal Coliform +2 more |
| Unalakleet | 757 | 646 | 174 | Disinfection Byproducts, E. coli, Fecal Coliform |
| Yakutat | 740 | 127 | 11 | Chlorine Dioxide, E. coli, Gross Alpha |
| Noorvik | 735 | 159 | 9 | Disinfection Byproducts, Fecal Coliform, Stage 2 DBP +1 more |
| Quinhagak | 724 | 307 | 35 | Fecal Coliform |
| Glennallen | 700 | 148 | 9 | Chlorine Dioxide, Disinfection Byproducts |
| Gambell | 669 | 298 | 19 | Disinfection Byproducts, E. coli |
| Fort Yukon | 665 | 54 | 0 | |
| Whittier | 650 | 66 | 0 | |
| Kipnuk | 639 | 338 | 1 | Disinfection Byproducts |
| Scammon Bay | 637 | 626 | 34 | E. coli, Fecal Coliform |
| Akiachak | 627 | 152 | 1 | Chlorine Dioxide |
| Buckland | 600 | 344 | 128 | Disinfection Byproducts, E. coli, Fecal Coliform +2 more |
| Stebbins | 590 | 99 | 0 | |
| Pilot Station | 580 | 183 | 5 | Chlorine Dioxide |
| Shishmaref | 572 | 206 | 34 | Fecal Coliform, TTHM |
| Alakanuk | 570 | 1,510 | 14 | E. coli, Fecal Coliform, Stage 2 DBP +1 more |
| New Stuyahok | 566 | 190 | 18 | Chlorine Dioxide |
| Saint Marys | 548 | 253 | 16 | E. coli, Fecal Coliform |
| Kongiganak | 547 | 981 | 52 | E. coli, Fecal Coliform |
| Chugiak | 526 | 1,544 | 7 | Chlorine Dioxide, E. coli, Stage 2 DBP |
| Kasigluk | 516 | 302 | 18 | Chlorine Dioxide, Disinfection Byproducts |
| Chefornak | 513 | 304 | 7 | Chlorine Dioxide |
| Manokotak | 508 | 1,177 | 31 | Chlorine Dioxide, Stage 2 DBP |
| Salcha | 508 | 93 | 3 | Chlorine Dioxide |
| Trapper Creek | 500 | 0 | 0 | |
| Nunapitchuk | 496 | 89 | 13 | Chlorine Dioxide, TTHM, Total Haloacetic Acids (HAA5) |
| St. Michael | 495 | 182 | 4 | Fecal Coliform, Stage 2 DBP |
| Nenana | 486 | 18 | 0 | |
| Egegik | 485 | 78 | 4 | Chlorine Dioxide |
| Noatak | 485 | 115 | 0 | |
| Thorne Bay | 470 | 375 | 106 | Fecal Coliform, TTHM, Total Haloacetic Acids (HAA5) |
| Kiana | 455 | 37 | 7 | Chlorine Dioxide |
| Kivalina | 452 | 273 | 104 | E. coli, Fecal Coliform |
| Angoon | 450 | 752 | 42 | Fecal Coliform, Gross Alpha, Stage 2 DBP +2 more |
| Brevig Mission | 442 | 125 | 18 | Chlorine Dioxide |
| Copper Center | 436 | 197 | 0 | |
| Encino | 435 | 9 | 6 | Chlorine Dioxide |
| Clear | 433 | 13 | 0 | |
| Seldovia | 418 | 220 | 5 | E. coli, Fecal Coliform |
| Hydaburg | 415 | 562 | 75 | E. coli, Fecal Coliform, TTHM +1 more |
| Kake | 415 | 327 | 128 | E. coli, Fecal Coliform, TTHM +1 more |
| Kwigillingok | 400 | 1,184 | 6 | Fecal Coliform |
| False Pass | 393 | 26 | 5 | Fecal Coliform, Stage 2 DBP |
| Saint Paul | 380 | 200 | 7 | Chlorine Dioxide, Stage 2 DBP |
| Tuluksak | 373 | 480 | 8 | Chlorine Dioxide |
| Nikolaevsk | 360 | 192 | 5 | Fecal Coliform, Gross Alpha, Stage 2 DBP |
| Tuntutuliak | 350 | 381 | 29 | Barium, Chlorine Dioxide, Disinfection Byproducts +2 more |
| Akiak | 346 | 28 | 0 | |
| Mcgrath | 341 | 153 | 37 | Contaminant 2920, TTHM, Total Haloacetic Acids (HAA5) |
| Napakiak | 336 | 103 | 2 | Chlorine Dioxide |
| Adak | 325 | 181 | 19 | Fecal Coliform, Total Haloacetic Acids (HAA5) |
| Huslia | 323 | 77 | 1 | Chlorine Dioxide |
| Elim | 320 | 93 | 17 | E. coli, Fecal Coliform, Stage 2 DBP |
| Atmautluak | 311 | 373 | 14 | Chlorine Dioxide, E. coli |
| Marshall | 308 | 239 | 3 | Chlorine Dioxide |
| Voznesenka | 300 | 64 | 8 | Chlorine Dioxide, Fecal Coliform, Gross Alpha |
| Denali Park | 300 | 120 | 3 | Chlorine Dioxide |
| Shungnak | 299 | 255 | 10 | Fecal Coliform |
| Teller | 295 | 552 | 31 | E. coli, Fecal Coliform, TTHM |
| Nanwalek | 281 | 597 | 18 | E. coli, Fecal Coliform, Gross Alpha |
| Eek | 280 | 482 | 8 | Fecal Coliform |
| Koyuk | 277 | 187 | 17 | E. coli, Fecal Coliform, Stage 2 DBP |
| Chignik Lagoon | 273 | 168 | 12 | Chlorine Dioxide, E. coli, Fecal Coliform |
| Larsen Bay | 271 | 127 | 1 | Stage 2 DBP |
| Tanana | 271 | 368 | 21 | E. coli, Fecal Coliform |
| Shaktoolik | 270 | 253 | 18 | E. coli, TTHM |
| Ambler | 261 | 65 | 5 | Chlorine Dioxide, Stage 2 DBP |
| Delta Junction | 254 | 53 | 8 | Chlorine Dioxide |
| Old Harbor | 246 | 396 | 48 | Fecal Coliform |
| Nulato | 245 | 21 | 3 | Chlorine Dioxide, Stage 2 DBP |
| Nightmute | 243 | 485 | 16 | Chlorine Dioxide, E. coli |
| Pelican | 230 | 161 | 4 | Fecal Coliform |
| Northway | 223 | 13 | 3 | Chlorine Dioxide |
| Ruby | 215 | 179 | 5 | Chlorine Dioxide |
| Kaltag | 214 | 107 | 14 | Fecal Coliform, Stage 2 DBP |
| Nunam Iqua | 213 | 892 | 75 | Contaminant 2920, TTHM |
| White Mountain | 210 | 23 | 5 | Chlorine Dioxide |
| Grayling | 207 | 2,197 | 113 | E. coli, Fecal Coliform, Stage 2 DBP |
| Tyonek | 206 | 51 | 0 | |
| Nondalton | 205 | 933 | 35 | E. coli, Fecal Coliform |
| Minto | 205 | 666 | 17 | Chlorine Dioxide, Stage 2 DBP |
| Napaskiak | 200 | 208 | 11 | Chlorine Dioxide |
| Chignik Lake | 200 | 159 | 9 | Chlorine Dioxide |
| Coffman Cove | 199 | 93 | 28 | Contaminant 2920, TTHM, Total Haloacetic Acids (HAA5) |
| Chignik Bay | 199 | 205 | 25 | Chlorine Dioxide, E. coli, Fecal Coliform |
| Mekoryuk | 198 | 70 | 3 | E. coli |
| Woods Cross | 192 | 218 | 42 | Fecal Coliform, TTHM, Total Haloacetic Acids (HAA5) |
| Eagle | 192 | 40 | 0 | |
| Cold Bay | 182 | 13 | 0 | |
| Venetie | 181 | 285 | 7 | E. coli |
| Port Graham | 180 | 124 | 10 | E. coli, Fecal Coliform |
| Port Lions | 175 | 143 | 31 | Chlorine Dioxide, Fecal Coliform, Stage 2 DBP |
| Arctic Village | 175 | 435 | 8 | E. coli, Fecal Coliform |
| Wales | 173 | 831 | 68 | Chlorine Dioxide, Haloacetic Acids |
| Koliganek | 170 | 75 | 12 | Chlorine Dioxide |
| Newtok | 170 | 1,141 | 0 | |
| Kokhanok | 160 | 611 | 57 | Fecal Coliform |
| Deering | 160 | 331 | 127 | Disinfection Byproducts, E. coli, Fecal Coliform +2 more |
| Livingston | 156 | 202 | 5 | Chlorine Dioxide, Stage 2 DBP |
| Nikiski | 150 | 58 | 1 | Gross Alpha |
| Golovin | 150 | 420 | 27 | Disinfection Byproducts, E. coli, Fecal Coliform +2 more |
| Tok | 150 | 51 | 9 | Chlorine Dioxide |
| Crooked Creek | 147 | 429 | 7 | Chlorine Dioxide |
| Ouzinkike | 144 | 28 | 6 | Fecal Coliform |
| Allakaket | 135 | 443 | 5 | Chlorine Dioxide |
| Clarks Point | 128 | 364 | 8 | Chlorine Dioxide, E. coli, Gross Alpha +1 more |
| Ward Cove | 125 | 113 | 1 | Gross Alpha |
| Chuathbaluk | 123 | 176 | 1 | Chlorine Dioxide |
| Girdwood | 120 | 47 | 3 | Chlorine Dioxide |
| Sutton | 110 | 20 | 4 | Chlorine Dioxide |
| Circle | 110 | 270 | 9 | Chlorine Dioxide |
| Pitka'S Point | 109 | 265 | 2 | E. coli, Stage 2 DBP |
| Tanacross | 108 | 251 | 3 | Chlorine Dioxide |
| Hughes | 107 | 372 | 12 | Fecal Coliform |
| Igiugig | 100 | 119 | 0 |
Data Sources
Drinking water data from the EPA Safe Drinking Water Information System (SDWIS). Only active community water systems (CWS) serving 100+ people are included.