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 |
|---|---|---|---|---|
|
Kongiganak Water System Kongiganak · Bethel Census Area County |
547 | 7 | 0 | |
|
Nunapitchuk Water System Nunapitchuk · Bethel Census Area County |
496 | 6 | 1 | |
|
Nenana Municipal Water Nenana · Yukon-Koyukuk Census Area County |
486 | 1 | 0 | |
|
Noatak Community Water System Noatak · Northwest Arctic Borough County |
485 | 6 | 1 | |
|
AC Alaska Commercial Store Bethel · Bethel Census Area County |
475 | 6 | 0 | |
|
Kivalina Water System Kivalina · Northwest Arctic Borough County |
452 | 7 | 0 | |
|
Brevig Mission Water System Brevig Mission · Nome Census Area County |
442 | 5 | 0 | |
|
Kwigillingok Washeteria Kwigillingok · Bethel Census Area County |
400 | 10 | 0 | |
|
Lksd Tununak Paul Albert HS Tununak · Bethel Census Area County |
385 | 9 | 0 | |
|
Saint Paul Water System Saint Paul · Aleutians West Census Area County |
380 | 7 | 1 | |
|
Tuluksak Water System Tuluksak · Bethel Census Area County |
373 | 9 | 0 | |
|
Nikolaevsk Community Water System Nikolaevsk · Kenai Peninsula Borough County |
360 | 6 | 0 | |
|
Akiak Community Water System Akiak · Bethel Census Area County |
346 | 6 | 0 | |
|
McGrath Water System Mcgrath · Yukon-Koyukuk Census Area County |
341 | 5 | 0 | |
|
Huslia Public Water System Huslia · Yukon-Koyukuk Census Area County |
323 | 4 | 2 | |
|
Atmautluak Water System Atmautluak · Bethel Census Area County |
311 | 8 | 1 | |
|
Marshall Water System Marshall · County |
308 | 8 | 0 | |
|
Quality Services, LLC Water Delivery Nome · Nome Census Area County |
300 | 3 | 1 | |
|
Nanwalek Nanwalek · Kenai Peninsula Borough County |
281 | 11 | 2 | |
|
Eek Water System Eek · Bethel Census Area County |
280 | 9 | 0 | |
|
Larsen Bay Water System Larsen Bay · Kodiak Island Borough County |
271 | 11 | 0 | |
|
Too'gha INC in Tanana Tanana · Yukon-Koyukuk Census Area County |
271 | 9 | 1 | |
|
Shaktoolik Water System Shaktoolik · Nome Census Area County |
270 | 6 | 0 | |
|
Prudhoe Bay Hotel Prudhoe Bay · North Slope Borough County |
260 | 1 | 0 | |
|
Old Harbor Old Harbor · Kodiak Island Borough County |
246 | 9 | 0 | |
|
Old Kasigluk Akiuk Kasigluk · Bethel Census Area County |
240 | 7 | 1 | |
|
Nsbu Point Lay Pt. Lay · North Slope Borough County |
237 | 4 | 0 | |
|
Northway Washeteria Northway · Southeast Fairbanks Census Area County |
223 | 1 | 0 | |
|
Kivalina K-12 School Kivalina · Northwest Arctic Borough County |
217 | 5 | 0 | |
|
Nunam Iqua Water System Nunam Iqua · Bethel Census Area County |
213 | 11 | 1 | |
|
Grayling Water System Grayling · Yukon-Koyukuk Census Area County |
207 | 13 | 2 | |
|
Minto Community Water System Minto · Yukon-Koyukuk Census Area County |
205 | 10 | 0 | |
|
Nondalton Nondalton · Lake and Peninsula Borough County |
205 | 10 | 2 | |
|
Napaskiak West Water System Napaskiak · Bethel Census Area County |
200 | 8 | 1 | |
|
Coffman Cove Coffman Cove · County |
199 | 7 | 0 | |
|
Creekwood Park Water System Wasilla · Matanuska-Susitna Borough County |
192 | 6 | 0 | |
|
Venetie Water System Venetie · Yukon-Koyukuk Census Area County |
181 | 7 | 1 | |
|
Port Graham Port Graham · Kenai Peninsula Borough County |
180 | 8 | 0 | |
|
Hecla Greens Creek 920 Level Juneau · Juneau City and Borough County |
175 | 1 | 0 | |
|
Port Lions Port Lions · Kodiak Island Borough County |
175 | 9 | 0 | |
|
Rivers Edge Condominium Eagle River · Anchorage Municipality County |
168 | 1 | 0 | |
|
Deering Utility System Deering · Northwest Arctic Borough County |
160 | 7 | 0 | |
|
Crooked Creek Watering Point Crooked Creek · Bethel Census Area County |
147 | 6 | 1 | |
|
Chuathbaluk Water System Chuathbaluk · Bethel Census Area County |
123 | 9 | 2 | |
|
Chilkat Indian Village Haines · Haines Borough County |
113 | 10 | 1 | |
|
Circle Washeteria Circle · Yukon-Koyukuk Census Area County |
110 | 6 | 0 | |
|
Hughes Public Water Supply Hughes · Yukon-Koyukuk Census Area County |
107 | 9 | 2 | |
|
Ketchikan Water, Truck 1 Ketchikan · Ketchikan Gateway Borough County |
100 | 2 | 1 | |
|
Anvik Water System Anvik · Yukon-Koyukuk Census Area County |
96 | 8 | 2 | |
|
Akutan Akutan · Aleutians East Borough County |
95 | 10 | 0 |
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.