Chlorine (MRDL) violations in Alaska
152 active public water systems in Alaska had a Chlorine (MRDL) violation in the past three years, 56 of them in the latest quarter of EPA's data. What Chlorine (MRDL) is and why it matters.
Health effects: Acute high-dose exposure to chlorinated water can cause eye and nose irritation, stomach discomfort, and nausea. Chronic exposure above the MRDL is primarily a concern because elevated chlorine accelerates formation of trihalomethanes and haloacetic acids, which are associated with increased cancer risk over time.
Systems with a Chlorine (MRDL) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Trident Seafoods Corp. Akutan Akutan · Aleutians East Borough County |
1,400 | 3 | 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 | |
|
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 | |
|
Toksook Bay Water System Toksook Bay · Bethel Census Area County |
661 | 5 | 2 | |
|
Scammon Bay Water System Scammon Bay · County |
637 | 7 | 0 | |
|
Akiachak Water System Akiachak · Bethel Census Area County |
627 | 4 | 1 | |
|
Buckland Water System Buckland · Northwest Arctic Borough County |
600 | 11 | 1 | |
|
New Stuyahok Water System New Stuyahok · Dillingham Census Area County |
566 | 8 | 2 | |
|
St. Michael Water System Saint Michael · Nome Census Area County |
495 | 6 | 1 | |
|
Romig Park S/d Anchorage · Anchorage Municipality County |
493 | 2 | 0 | |
|
Galena Wtp1 City Galena · Yukon-Koyukuk Census Area County |
490 | 5 | 1 | |
|
Silver Bay Seafoods False Pass False Pass · Aleutians East Borough County |
470 | 7 | 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 | |
|
Potter Creek Water Company Anchorage · Anchorage Municipality County |
375 | 1 | 0 | |
|
Unified Alaskan Utilities Moorehand Div. Anchorage · Anchorage Municipality County |
350 | 1 | 0 | |
|
Adak Utilities Adak · Aleutians West Census Area County |
325 | 4 | 1 | |
|
Shungnak Water System Shungnak · Northwest Arctic Borough County |
299 | 8 | 1 | |
|
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 | |
|
Goodnews Bay Goodnews Bay · Bethel Census Area County |
250 | 5 | 0 | |
|
Old Kasigluk Akiuk Kasigluk · Bethel Census Area County |
240 | 7 | 1 | |
|
Ruby Water System Ruby · Yukon-Koyukuk Census Area County |
215 | 6 | 1 | |
|
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 | |
|
Nondalton Nondalton · Lake and Peninsula Borough County |
205 | 10 | 2 | |
|
Wales Water System Wales · Nome Census Area County |
173 | 9 | 2 | |
|
Kokhanok Water & WW System Kokhanok · Lake and Peninsula Borough County |
160 | 7 | 0 | |
|
Allakaket Public Water System Allakaket · Yukon-Koyukuk Census Area County |
135 | 7 | 3 | |
|
Chilkat Indian Village Haines · Haines Borough County |
113 | 10 | 1 | |
|
Pitka's Point Piped Water System Pitkas Point · County |
109 | 6 | 1 | |
|
Hughes Public Water Supply Hughes · Yukon-Koyukuk Census Area County |
107 | 9 | 2 | |
|
Akutan Akutan · Aleutians East Borough County |
95 | 10 | 0 | |
|
Tatitlek Water System Tatitlek · County |
95 | 8 | 0 | |
|
Kobuk Water System Kobuk · Northwest Arctic Borough County |
93 | 8 | 1 | |
|
Akhiok Akhiok · Kodiak Island Borough County |
90 | 9 | 0 | |
|
Perryville Water System Perryville · Lake and Peninsula Borough County |
88 | 11 | 0 | |
|
Rampart Washeteria Rampart · Yukon-Koyukuk Census Area County |
88 | 7 | 3 | |
|
Koyukuk Safewater Facility Koyukuk · Yukon-Koyukuk Census Area County |
85 | 6 | 1 | |
|
Diomede Joint Utilities Little Diomede · Nome Census Area County |
83 | 11 | 1 | |
|
Beaver Water System Beaver · Yukon-Koyukuk Census Area County |
80 | 6 | 0 | |
|
Saltry Halibut Cove · Kenai Peninsula Borough County |
75 | 5 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Chlorine (MRDL), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Chlorine (MRDL) 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.