Surface Water Treatment Rule (SWTR) violations in Alaska
141 active public water systems in Alaska had a Surface Water Treatment Rule (SWTR) violation in the past three years, 57 of them in the latest quarter of EPA's data. What Surface Water Treatment Rule (SWTR) is and why it matters.
Health effects: Without proper filtration/disinfection: Giardia lamblia (severe diarrhea, cramping), Cryptosporidium (life-threatening for immunocompromised individuals), viruses (hepatitis A, norovirus). Turbidity itself is not a health risk but can shield pathogens from disinfection.
Systems with a Surface Water Treatment Rule (SWTR) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Sportsmans Cove Lodge Ketchikan · Ketchikan Gateway Borough County |
55 | 4 | 1 | |
|
Eureka Lodge Glennallen · County |
54 | 2 | 1 | |
|
Yksd Allakaket School Allakaket · Yukon-Koyukuk Census Area County |
52 | 6 | 0 | |
|
Platinum City Water System Platinum · Bethel Census Area County |
51 | 6 | 2 | |
|
Southeast Alaska Logging Kodiak · Kodiak Island Borough County |
45 | 6 | 0 | |
|
Islander Bar & Restaurant Wasilla · Matanuska-Susitna Borough County |
38 | 3 | 2 | |
|
Nikolski Village Nikolski · Aleutians West Census Area County |
34 | 3 | 2 | |
|
Unalaska Water System Unalaska · Aleutians West Census Area County |
9,400 | 6 | 0 | |
|
Barrow Utilities & Elec. Coop., Inc. (bu Barrow · North Slope Borough County |
4,900 | 2 | 0 | |
|
Denali Main / Front Country Denali Park · Denali Borough County |
4,122 | 7 | 1 | |
|
Kotzebue Mun. Water System Kotzebue · Northwest Arctic Borough County |
3,234 | 2 | 0 | |
|
Petersburg Petersburg · County |
3,218 | 3 | 0 | |
|
Haines Borough Haines · Haines Borough County |
2,376 | 6 | 0 | |
|
Metlakatla Metlakatla · County |
1,575 | 9 | 3 | |
|
Alaska Wildlife Center Anchorage, Girdwood · Anchorage Municipality County |
1,020 | 2 | 0 | |
|
Hoonah PWS Hoonah · County |
980 | 7 | 0 | |
|
Klawock Klawock · County |
904 | 3 | 0 | |
|
Sand Point Water System Sand Point · Aleutians East Borough County |
830 | 7 | 0 | |
|
Emmonak Water System Emmonak · County |
820 | 10 | 3 | |
|
Eaglecrest Ski Area Juneau · Juneau City and Borough County |
771 | 3 | 0 | |
|
Unalakleet City Water Supply Unalakleet · Nome Census Area County |
757 | 6 | 0 | |
|
Noorvik Water System Noorvik · Northwest Arctic Borough County |
735 | 6 | 1 | |
|
Quinhagak Water System Quinhagak · Bethel Census Area County |
724 | 4 | 0 | |
|
Kipnuk Water System Kipnuk · Bethel Census Area County |
639 | 8 | 0 | |
|
The Water Service Barrow · North Slope Borough County |
638 | 3 | 0 | |
|
Kotlik Water System Kotlik · County |
617 | 9 | 1 | |
|
Nsbu Wainwright Wainwright · North Slope Borough County |
600 | 3 | 0 | |
|
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 | |
|
Kongiganak Water System Kongiganak · Bethel Census Area County |
547 | 7 | 0 | |
|
Noatak Community Water System Noatak · Northwest Arctic Borough County |
485 | 6 | 1 | |
|
Thorne Bay, City of Thorne Bay · County |
470 | 6 | 1 | |
|
Saxman Saxman · Ketchikan Gateway Borough County |
450 | 1 | 0 | |
|
Nsbu Nuiqsut Nuiqsut · North Slope Borough County |
443 | 3 | 0 | |
|
Seldovia Water System Seldovia · Kenai Peninsula Borough County |
418 | 5 | 0 | |
|
Hydaburg Hydaburg · County |
415 | 10 | 3 | |
|
Kake Municipal Water Kake · County |
415 | 4 | 0 | |
|
Lksd Tununak Paul Albert HS Tununak · Bethel Census Area County |
385 | 9 | 0 | |
|
Ice Services Treatment Plant # 2015 Deadhorse, Prudhoe Bay · North Slope Borough County |
349 | 2 | 0 | |
|
McGrath Water System Mcgrath · Yukon-Koyukuk Census Area County |
341 | 5 | 0 | |
|
Kenai Fjords Tours Seward · Kenai Peninsula Borough County |
306 | 4 | 0 | |
|
Milne Point Unit Hilcorp Prudhoe Bay · North Slope Borough County |
300 | 2 | 0 | |
|
Bering ST SD Teller Sc/wash Teller · Nome Census Area County |
295 | 4 | 0 | |
|
Nsbu Atqasuk Atqusak · North Slope Borough County |
284 | 2 | 0 | |
|
Eek Water System Eek · Bethel Census Area County |
280 | 9 | 0 | |
|
Lksd Nightmute HS & Elem Nightmute · Bethel Census Area County |
259 | 7 | 0 | |
|
Old Harbor Old Harbor · Kodiak Island Borough County |
246 | 9 | 0 | |
|
Nsbu Point Lay Pt. Lay · North Slope Borough County |
237 | 4 | 0 | |
|
Pelican Utilities Pelican · County |
230 | 5 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Surface Water Treatment Rule (SWTR), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Surface Water Treatment Rule (SWTR) 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.