Alaska water quality by county
22 counties with public water systems. Pick a county to see every system that serves it.
| County | Active systems | People served | Share with violations, 3 yr | Serious violators | Health flags |
|---|---|---|---|---|---|
| Aleutians East Borough | 8 | 4,402 | 2 | 0 | |
| Aleutians West Census Area | 8 | 10,909 | 2 | 3 | |
| Anchorage Municipality | 155 | 305,180 | 3 | 6 | |
| Bethel Census Area | 57 | 17,867 | 11 | 5 | |
| Bristol Bay Borough | 31 | 5,921 | 4 | 7 | |
| Denali Borough | 56 | 18,228 | 0 | 2 | |
| Dillingham Census Area | 24 | 6,913 | 3 | 3 | |
| Fairbanks North Star Borough | 64 | 161,917 | 7 | 8 | |
| Haines Borough | 6 | 2,824 | 1 | 0 | |
| Juneau City and Borough | 11 | 40,575 | 0 | 0 | |
| Kenai Peninsula Borough | 205 | 47,686 | 6 | 12 | |
| Ketchikan Gateway Borough | 22 | 12,315 | 1 | 3 | |
| Kodiak Island Borough | 16 | 14,166 | 0 | 1 | |
| Lake and Peninsula Borough | 16 | 2,235 | 4 | 3 | |
| Matanuska-Susitna Borough | 341 | 90,423 | 11 | 21 | |
| Nome Census Area | 17 | 10,325 | 7 | 0 | |
| North Slope Borough | 79 | 30,227 | 0 | 0 | |
| Northwest Arctic Borough | 16 | 8,887 | 7 | 0 | |
| Sitka City and Borough | 3 | 9,645 | 0 | 0 | |
| Southeast Fairbanks Census Area | 64 | 10,714 | 4 | 7 | |
| Yakutat City and Borough | 3 | 833 | 0 | 0 | |
| Yukon-Koyukuk Census Area | 34 | 6,119 | 14 | 6 |
under 30% 30 to 59% 60% and over
About this data
Share with violations counts any violation in the past three years, including monitoring and reporting lapses. Counts cover active systems; systems serving more than one county are counted in each.
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. Retrieved from ECHO on Oct 11, 2026.