Alaska water quality
Alaska has 1,289 active public water systems (3,557 on file total), 406 of them graded by TapGraded.
Grade distribution
Biggest water systems
MOA MUNICIPALITY OF ANCHORAGE
ANCHORAGE, AK · 221,351 served
GOLDEN HEART UTILITIES
FAIRBANKS, AK · 78,324 served
CITY AND BOROUGH OF JUNEAU
JUNEAU, AK · 38,526 served
JBER-ELMENDORF
JBER, AK · 30,003 served
COLLEGE UTILITIES CORPORATION
FAIRBANKS, AK · 27,000 served
DOYON UTILITIES JBER - RICHARDSON
FAIRBANKS, AK · 20,284 served
FT WAINWRIGHT - MAIN POST
FAIRBANKS, AK · 20,076 served
WASILLA WATER SYSTEM
WASILLA, AK · 18,492 served
EIELSON - AIR FORCE BASE
EIELSON AFB, AK · 11,870 served
KODIAK WATER SYSTEM
KODIAK, AK · 9,547 served
Lowest-graded systems
Active, graded systems serving at least 10,000 people, ordered by lowest Tap Grade first.
MOA MUNICIPALITY OF ANCHORAGE
ANCHORAGE, AK · 221,351 served
GOLDEN HEART UTILITIES
FAIRBANKS, AK · 78,324 served
COLLEGE UTILITIES CORPORATION
FAIRBANKS, AK · 27,000 served
WASILLA WATER SYSTEM
WASILLA, AK · 18,492 served
EIELSON - AIR FORCE BASE
EIELSON AFB, AK · 11,870 served
FT WAINWRIGHT - MAIN POST
FAIRBANKS, AK · 20,076 served
DOYON UTILITIES JBER - RICHARDSON
FAIRBANKS, AK · 20,284 served
CITY AND BOROUGH OF JUNEAU
JUNEAU, AK · 38,526 served
JBER-ELMENDORF
JBER, AK · 30,003 served
Cities in Alaska
Source: EPA SDWIS/ECHO · Data as of 2026Q2