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 |
|---|---|---|---|---|
|
Bering ST SD Teller Sc/wash Teller · Nome Census Area County |
295 | 4 | 0 | |
|
Galena Wtp2 Gila Galena · Yukon-Koyukuk Census Area County |
290 | 4 | 1 | |
|
Nsbu Atqasuk Atqusak · North Slope Borough County |
284 | 2 | 0 | |
|
Eek Water System Eek · Bethel Census Area County |
280 | 9 | 0 | |
|
Too'gha INC in Tanana Tanana · Yukon-Koyukuk Census Area County |
271 | 9 | 1 | |
|
Lksd Nightmute HS & Elem Nightmute · Bethel Census Area County |
259 | 7 | 0 | |
|
Old Harbor Old Harbor · Kodiak Island Borough County |
246 | 9 | 0 | |
|
Kathy O Estates Anchorage · Anchorage Municipality County |
242 | 2 | 1 | |
|
Nsbu Point Lay Pt. Lay · North Slope Borough County |
237 | 4 | 0 | |
|
Utopia Meadows SD Wasilla · Matanuska-Susitna Borough County |
232 | 3 | 0 | |
|
Lksd Chefornak Chaptnguak HS Chefornak · Bethel Census Area County |
230 | 2 | 0 | |
|
Pelican Utilities Pelican · County |
230 | 5 | 0 | |
|
Kivalina K-12 School Kivalina · Northwest Arctic Borough County |
217 | 5 | 0 | |
|
Kaltag Public Water System Kaltag · Yukon-Koyukuk Census Area County |
214 | 4 | 0 | |
|
Nunam Iqua Water System Nunam Iqua · Bethel Census Area County |
213 | 11 | 1 | |
|
Minto Community Water System Minto · Yukon-Koyukuk Census Area County |
205 | 10 | 0 | |
|
Ft. Greely Gmd Missile Fac. Complex Delta Junction · Southeast Fairbanks Census Area County |
200 | 1 | 0 | |
|
Napaskiak West Water System Napaskiak · Bethel Census Area County |
200 | 8 | 1 | |
|
Chignik Bay Water System Chignik Bay · Lake and Peninsula Borough County |
199 | 6 | 1 | |
|
Coffman Cove Coffman Cove · County |
199 | 7 | 0 | |
|
Mekoryuk Washeteria Reservoir Mekoryuk · Bethel Census Area County |
198 | 5 | 0 | |
|
Creekwood Park Water System Wasilla · Matanuska-Susitna Borough County |
192 | 6 | 0 | |
|
Cold Bay Cold Bay · Aleutians East Borough County |
182 | 3 | 0 | |
|
Venetie Water System Venetie · Yukon-Koyukuk Census Area County |
181 | 7 | 1 | |
|
Port Graham Port Graham · Kenai Peninsula Borough County |
180 | 8 | 0 | |
|
Arctic Village Water System Arctic Village · Yukon-Koyukuk Census Area County |
175 | 8 | 2 | |
|
Port Lions Port Lions · Kodiak Island Borough County |
175 | 9 | 0 | |
|
Lksd Napaskiak Z J Williams SC Napaskiak · Bethel Census Area County |
161 | 3 | 0 | |
|
Deering Utility System Deering · Northwest Arctic Borough County |
160 | 7 | 0 | |
|
Golovin Community Water System Golovin · Nome Census Area County |
150 | 8 | 2 | |
|
Crooked Creek Watering Point Crooked Creek · Bethel Census Area County |
147 | 6 | 1 | |
|
Ouzinkie Water System Ouzinkie · Kodiak Island Borough County |
144 | 4 | 1 | |
|
Lksd Kongiganak HS & Elem Kongiganak · Bethel Census Area County |
143 | 5 | 1 | |
|
Hilcorp Rig Tenders Well #3 Kenai · Kenai Peninsula Borough County |
125 | 1 | 0 | |
|
Chuathbaluk Water System Chuathbaluk · Bethel Census Area County |
123 | 9 | 2 | |
|
Lksd Atmautluak Joann a Alexie Memorial Atmautluak · Bethel Census Area County |
123 | 5 | 0 | |
|
Lksd Kwigillingok HS & Elem Kwigillingok · Bethel Census Area County |
117 | 7 | 0 | |
|
Igiugig Water System Igiugig · Lake and Peninsula Borough County |
100 | 4 | 0 | |
|
Anvik Water System Anvik · Yukon-Koyukuk Census Area County |
96 | 8 | 2 | |
|
Port Alexander PWS Port Alexander · Sitka City and Borough County |
95 | 5 | 0 | |
|
Palmer Correctional Center Palmer · Matanuska-Susitna Borough County |
90 | 1 | 0 | |
|
Crna Tazlina Health Clinic Copper Center · County |
87 | 2 | 1 | |
|
Native Village of Sleetmute Sleetmute · Bethel Census Area County |
82 | 8 | 0 | |
|
Lksd Kipnuk HS Kipnuk · Bethel Census Area County |
80 | 7 | 2 | |
|
Chalkyitsik Village Water Chalkyitsik · Yukon-Koyukuk Census Area County |
76 | 7 | 2 | |
|
Lksd Mekoryuk Nunivaarmiut SC Mekoryuk · Bethel Census Area County |
67 | 6 | 0 | |
|
Kasaan Ketchikan · Ketchikan Gateway Borough County |
66 | 3 | 0 | |
|
Karluk Water System Karluk · Kodiak Island Borough County |
60 | 2 | 1 | |
|
Shageluk Water System Shageluk · Yukon-Koyukuk Census Area County |
60 | 8 | 1 | |
|
Gulkana Village Gulkana · County |
54 | 4 | 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.