Total Haloacetic Acids (HAA5) violations in Alaska
118 active public water systems in Alaska had a Total Haloacetic Acids (HAA5) violation in the past three years, 27 of them in the latest quarter of EPA's data. What Total Haloacetic Acids (HAA5) is and why it matters.
Health effects: Dichloroacetic acid is a probable human carcinogen (Group B2). Long-term exposure to trichloroacetic acid may also increase cancer risk. Animal studies show liver, kidney, and reproductive effects at high doses.
Systems with a Total Haloacetic Acids (HAA5) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Eielson Air Force Base Eielson · Fairbanks North Star Borough County |
11,870 | 3 | 0 | |
|
Kotzebue Mun. Water System Kotzebue · Northwest Arctic Borough County |
3,234 | 2 | 0 | |
|
City of Hooper Bay Hooper Bay · County |
1,375 | 10 | 4 | |
|
Klawock Klawock · County |
904 | 3 | 0 | |
|
Selawik Safewater Facility Selawik · Northwest Arctic Borough County |
846 | 9 | 3 | |
|
Emmonak Water System Emmonak · County |
820 | 10 | 3 | |
|
Kwethluk New Piped Water System Kwethluk · Bethel Census Area County |
760 | 11 | 2 | |
|
Ft. Yukon Public Water System Fort Yukon · Yukon-Koyukuk Census Area County |
665 | 6 | 1 | |
|
Scammon Bay Water System Scammon Bay · County |
637 | 7 | 0 | |
|
Buckland Water System Buckland · Northwest Arctic Borough County |
600 | 11 | 1 | |
|
Thorne Bay, City of Thorne Bay · County |
470 | 6 | 1 | |
|
Kiana Water System Kiana · Northwest Arctic Borough County |
455 | 7 | 2 | |
|
Angoon Public Water Angoon · County |
450 | 13 | 2 | |
|
Hydaburg Hydaburg · County |
415 | 10 | 3 | |
|
Kake Municipal Water Kake · County |
415 | 4 | 0 | |
|
Shungnak Water System Shungnak · Northwest Arctic Borough County |
299 | 8 | 1 | |
|
Vallenar View Mobile Home Park Ketchikan · Ketchikan Gateway Borough County |
225 | 3 | 0 | |
|
Ruby Water System Ruby · Yukon-Koyukuk Census Area County |
215 | 6 | 1 | |
|
Wales Water System Wales · Nome Census Area County |
173 | 9 | 2 | |
|
Golovin Community Water System Golovin · Nome Census Area County |
150 | 8 | 2 | |
|
Allakaket Public Water System Allakaket · Yukon-Koyukuk Census Area County |
135 | 7 | 3 | |
|
Tatitlek Water System Tatitlek · County |
95 | 8 | 0 | |
|
Rampart Washeteria Rampart · Yukon-Koyukuk Census Area County |
88 | 7 | 3 | |
|
Diomede Joint Utilities Little Diomede · Nome Census Area County |
83 | 11 | 1 | |
|
Lksd Kipnuk HS Kipnuk · Bethel Census Area County |
80 | 7 | 2 | |
|
Chalkyitsik Village Water Chalkyitsik · Yukon-Koyukuk Census Area County |
76 | 7 | 2 | |
|
Yksd Allakaket School Allakaket · Yukon-Koyukuk Census Area County |
52 | 6 | 0 | |
|
Doyon Utilities Jber Richardson Fort Richardson · Anchorage Municipality County |
20,284 | 1 | 0 | |
|
Unalaska Water System Unalaska · Aleutians West Census Area County |
9,400 | 6 | 0 | |
|
Soldotna Soldotna · Kenai Peninsula Borough County |
4,807 | 1 | 0 | |
|
Nome Joint Utility System Nome · Nome Census Area County |
3,920 | 1 | 0 | |
|
Haines Borough Haines · Haines Borough County |
2,376 | 6 | 0 | |
|
Bethel Heights Water System Bethel · Bethel Census Area County |
2,228 | 3 | 0 | |
|
Bethel-City S/d Water Bethel · Bethel Census Area County |
1,660 | 2 | 0 | |
|
Metlakatla Metlakatla · County |
1,575 | 9 | 3 | |
|
Hilcorp Pboc Prudhoe Bay · North Slope Borough County |
1,200 | 2 | 0 | |
|
Hoonah PWS Hoonah · County |
980 | 7 | 0 | |
|
South Tongass Water Utility Ketchikan · Ketchikan Gateway Borough County |
975 | 1 | 0 | |
|
Chevak Water System Chevak · County |
938 | 7 | 2 | |
|
Mountain Village Water System Mountain Village · County |
887 | 11 | 2 | |
|
Sand Point Water System Sand Point · Aleutians East Borough County |
830 | 7 | 0 | |
|
Savoonga Water Supply Savoonga · Nome Census Area County |
802 | 5 | 2 | |
|
Noorvik Water System Noorvik · Northwest Arctic Borough County |
735 | 6 | 1 | |
|
Gambell Water System Gambell · Nome Census Area County |
669 | 10 | 2 | |
|
Kipnuk Water System Kipnuk · Bethel Census Area County |
639 | 8 | 0 | |
|
Kotlik Water System Kotlik · County |
617 | 9 | 1 | |
|
Pilot Station Water System Pilot Station · County |
580 | 6 | 1 | |
|
Shishmaref Water System Shishmaref · Nome Census Area County |
572 | 5 | 0 | |
|
Alakanuk Water System Alakanuk · County |
570 | 14 | 2 | |
|
St. Marys Water System Saint Mary's · County |
548 | 6 | 1 |
About this data
A system is counted once if any of its violations in the past three years involved Total Haloacetic Acids (HAA5), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Total Haloacetic Acids (HAA5) alone.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Alaska records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet.