Interim Enhanced Surface Water Treatment Rule violations in Alaska
89 active public water systems in Alaska had a Interim Enhanced Surface Water Treatment Rule violation in the past three years, 31 of them in the latest quarter of EPA's data. What Interim Enhanced Surface Water Treatment Rule is and why it matters.
Systems with a Interim Enhanced Surface Water Treatment Rule 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 | |
|
Noatak Community Water System Noatak · Northwest Arctic Borough County |
485 | 6 | 1 | |
|
Thorne Bay, City of Thorne Bay · County |
470 | 6 | 1 | |
|
Angoon Public Water Angoon · County |
450 | 13 | 2 | |
|
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 | |
|
McGrath Water System Mcgrath · Yukon-Koyukuk Census Area County |
341 | 5 | 0 | |
|
Kenai Fjords Tours Seward · Kenai Peninsula Borough County |
306 | 4 | 0 | |
|
Bering ST SD Teller Sc/wash Teller · Nome Census Area County |
295 | 4 | 0 | |
|
Koyuk Public Water System Koyuk · Nome Census Area County |
277 | 7 | 1 | |
|
Larsen Bay Water System Larsen Bay · Kodiak Island Borough County |
271 | 11 | 0 | |
|
Vallenar View Mobile Home Park Ketchikan · Ketchikan Gateway Borough County |
225 | 3 | 0 | |
|
Nunam Iqua Water System Nunam Iqua · Bethel Census Area County |
213 | 11 | 1 | |
|
Nondalton Nondalton · Lake and Peninsula Borough County |
205 | 10 | 2 | |
|
Coffman Cove Coffman Cove · County |
199 | 7 | 0 | |
|
Mekoryuk Washeteria Reservoir Mekoryuk · Bethel Census Area County |
198 | 5 | 0 | |
|
Venetie Water System Venetie · Yukon-Koyukuk Census Area County |
181 | 7 | 1 | |
|
Port Graham Port Graham · Kenai Peninsula Borough County |
180 | 8 | 0 | |
|
Port Lions Port Lions · Kodiak Island Borough County |
175 | 9 | 0 | |
|
Waterfall Resort Ketchikan · Ketchikan Gateway Borough County |
168 | 4 | 0 | |
|
Deering Utility System Deering · Northwest Arctic Borough County |
160 | 7 | 0 | |
|
Echo Ranch Bible Camp Juneau AK Auke Bay · Juneau City and Borough County |
160 | 3 | 0 | |
|
Clover Pass Resort Ketchikan · Ketchikan Gateway Borough County |
133 | 1 | 0 | |
|
Haines Ferry Terminal Haines · Haines Borough County |
104 | 4 | 0 | |
|
Akutan Akutan · Aleutians East Borough County |
95 | 10 | 0 | |
|
Tatitlek Water System Tatitlek · County |
95 | 8 | 0 | |
|
Akhiok Akhiok · Kodiak Island Borough County |
90 | 9 | 0 | |
|
Native Village of Sleetmute Sleetmute · Bethel Census Area County |
82 | 8 | 0 | |
|
Shrine of St. Therese Juneau · Juneau City and Borough County |
78 | 2 | 0 | |
|
Saltry Halibut Cove · Kenai Peninsula Borough County |
75 | 5 | 0 | |
|
Downtown Chicken Chicken · Southeast Fairbanks Census Area County |
60 | 2 | 0 | |
|
Yksd Allakaket School Allakaket · Yukon-Koyukuk Census Area County |
52 | 6 | 0 | |
|
Chenega Chenega Bay · County |
50 | 5 | 0 | |
|
The Lodge at Yes Bay Ketchikan · Ketchikan Gateway Borough County |
50 | 2 | 0 | |
|
George Inlet Lodge Ketchikan · Ketchikan Gateway Borough County |
49 | 3 | 0 | |
|
Silverking Lodge Ketchikan · Ketchikan Gateway Borough County |
46 | 3 | 0 | |
|
Pybus Point Lodge Juneau · Juneau City and Borough County |
44 | 3 | 0 | |
|
Denali Backcountry Lodge Denali Park · Denali Borough County |
38 | 3 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Interim Enhanced Surface Water Treatment Rule, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Interim Enhanced Surface Water Treatment Rule 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.