Revised Total Coliform Rule (RTCR) violations in Alaska
498 active public water systems in Alaska had a Revised Total Coliform Rule (RTCR) violation in the past three years, 193 of them in the latest quarter of EPA's data. What Revised Total Coliform Rule (RTCR) is and why it matters.
Health effects: Total coliform bacteria indicate that the disinfection barrier has been breached or fecal contamination is entering the system. E. coli specifically indicates fecal contamination and the possible presence of disease-causing pathogens (norovirus, Salmonella, Shigella, Campylobacter). Illness can be severe in elderly, young children, and immunocompromised individuals.
Systems with a Revised Total Coliform Rule (RTCR) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Valley Water Company Fairbanks · Fairbanks North Star Borough County |
1,575 | 6 | 3 | |
|
Fairview Market Place Wasilla · Matanuska-Susitna Borough County |
1,113 | 1 | 0 | |
|
Grande Denali / Denali Bluffs Denali Park · Denali Borough County |
1,000 | 3 | 0 | |
|
Whittier Head of Bay Cruise Shipterminal Whittier · County |
954 | 1 | 0 | |
|
Selawik Safewater Facility Selawik · Northwest Arctic Borough County |
846 | 9 | 3 | |
|
Savoonga Water Supply Savoonga · Nome Census Area County |
802 | 5 | 2 | |
|
Unalakleet City Water Supply Unalakleet · Nome Census Area County |
757 | 6 | 0 | |
|
Northern Lights Well Denali Park · Denali Borough County |
725 | 1 | 1 | |
|
Gambell Water System Gambell · Nome Census Area County |
669 | 10 | 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 | |
|
Alaska General Seafoods Naknek Cannery Naknek · Bristol Bay Borough County |
600 | 2 | 2 | |
|
Buckland Water System Buckland · Northwest Arctic Borough County |
600 | 11 | 1 | |
|
New Stuyahok Water System New Stuyahok · Dillingham Census Area County |
566 | 8 | 2 | |
|
Salcha Community Watering Point Salcha · Fairbanks North Star Borough County |
508 | 7 | 4 | |
|
North Pacific Trading, LLC Naknek · Bristol Bay Borough County |
506 | 1 | 0 | |
|
Silver Bay Seafoods Naknek Naknek · Bristol Bay Borough County |
500 | 2 | 0 | |
|
St. Michael Water System Saint Michael · Nome Census Area County |
495 | 6 | 1 | |
|
AC Alaska Commercial Store Bethel · Bethel Census Area County |
475 | 6 | 0 | |
|
Kiana Water System Kiana · Northwest Arctic Borough County |
455 | 7 | 2 | |
|
Kivalina Water System Kivalina · Northwest Arctic Borough County |
452 | 7 | 0 | |
|
Angoon Public Water Angoon · County |
450 | 13 | 2 | |
|
Kwigillingok Washeteria Kwigillingok · Bethel Census Area County |
400 | 10 | 0 | |
|
White Whale Water Anchorage · Anchorage Municipality County |
400 | 2 | 1 | |
|
Tuntutuliak Washeteria and Watering PT Tuntutuliak · Bethel Census Area County |
350 | 7 | 0 | |
|
Usnps Katmai Brooks Camp King Salmon · Bristol Bay Borough County |
350 | 2 | 1 | |
|
Adak Utilities Adak · Aleutians West Census Area County |
325 | 4 | 1 | |
|
Rose & Daves Cafe Inc. Healy · Denali Borough County |
304 | 1 | 0 | |
|
North Pacific Seafoods, Pederson Point Naknek · Bristol Bay Borough County |
300 | 2 | 1 | |
|
Silver Bay Seafoods Wood River Dillingham · Dillingham Census Area County |
300 | 1 | 0 | |
|
Point Higgins Elementary School Ketchikan · Ketchikan Gateway Borough County |
300 | 1 | 0 | |
|
Shungnak Water System Shungnak · Northwest Arctic Borough County |
299 | 8 | 1 | |
|
Slavic Evangelical Church Wasilla · Matanuska-Susitna Borough County |
298 | 3 | 1 | |
|
Manokotak Water System Manokotak · Dillingham Census Area County |
293 | 8 | 2 | |
|
Nanwalek Nanwalek · Kenai Peninsula Borough County |
281 | 11 | 2 | |
|
Koyuk Public Water System Koyuk · Nome Census Area County |
277 | 7 | 1 | |
|
Chignik Lagoon Water System Chignik Lagoon · Lake and Peninsula Borough County |
273 | 4 | 2 | |
|
Larsen Bay Water System Larsen Bay · Kodiak Island Borough County |
271 | 11 | 0 | |
|
Shaktoolik Water System Shaktoolik · Nome Census Area County |
270 | 6 | 0 | |
|
Ambler Community Water System Ambler · Northwest Arctic Borough County |
261 | 6 | 2 | |
|
Goodnews Bay Goodnews Bay · Bethel Census Area County |
250 | 5 | 0 | |
|
Campbell Creek Cong. Jehovah Witness Anchorage · Anchorage Municipality County |
246 | 1 | 0 | |
|
Nightmute New Watering Point Nightmute · Bethel Census Area County |
243 | 5 | 3 | |
|
Manokotak Heights W/s Manokotak · Dillingham Census Area County |
215 | 7 | 1 | |
|
McCarthy Lodge Glennallen · County |
215 | 2 | 0 | |
|
Ruby Water System Ruby · Yukon-Koyukuk Census Area County |
215 | 6 | 1 | |
|
Nunam Iqua Water System Nunam Iqua · Bethel Census Area County |
213 | 11 | 1 | |
|
Kings Lake Camp Well #1 Wasilla · Matanuska-Susitna Borough County |
211 | 2 | 0 | |
|
White Mountain Water System White Mountain · Nome Census Area County |
210 | 2 | 0 | |
|
Grayling Water System Grayling · Yukon-Koyukuk Census Area County |
207 | 13 | 2 |
About this data
A system is counted once if any of its violations in the past three years involved Revised Total Coliform Rule (RTCR), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Revised Total Coliform Rule (RTCR) 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.