countyscore

Best Water Quality Counties in Alaska

EPA drinking water health violations and safety grades Compare rankings across all 30 counties.

Average Water Quality Score
20/100
Top County
Yakutat City and Borough
Counties Ranked
22

Top 10

#1
Yakutat City and Borough
AK
86/100
#2
Juneau City and Borough
AK
62/100
#3
North Slope Borough
AK
54/100
#4
Anchorage Municipality
AK
52/100
#5
Fairbanks North Star Borough
AK
48/100
#6
Sitka City and Borough
AK
33/100
#7
Aleutians West Census Area
AK
17/100
#8
Matanuska-Susitna Borough
AK
15/100
#9
Southeast Fairbanks Census Area
AK
12/100
#10
Kenai Peninsula Borough
AK
12/100

All Alaska Counties Ranked

#CountyWater Quality ScoreOverall Score
1Yakutat City and Borough, AK
86
51.5
2Juneau City and Borough, AK
62
49.5
3North Slope Borough, AK
53.7
48.6
4Anchorage Municipality, AK
52.4
29.5
5Fairbanks North Star Borough, AK
47.8
34.5
6Sitka City and Borough, AK
33.3
57.3
7Aleutians West Census Area, AK
16.8
56.2
8Matanuska-Susitna Borough, AK
15.3
44.4
9Southeast Fairbanks Census Area, AK
12
47.9
10Kenai Peninsula Borough, AK
11.6
52.4
11Haines Borough, AK
10.4
63
12Denali Borough, AK
8.3
47
13Kodiak Island Borough, AK
6.8
47.5
14Dillingham Census Area, AK
6.2
46.8
15Ketchikan Gateway Borough, AK
5.1
48.9
16Aleutians East Borough, AK
3.4
60.8
17Bristol Bay Borough, AK
1.4
45.9
18Bethel Census Area, AK
1.2
45.9
19Nome Census Area, AK
1
38.6
20Lake and Peninsula Borough, AK
0.7
46.2
21Northwest Arctic Borough, AK
0.3
50.1
22Yukon-Koyukuk Census Area, AK
0.3
32.6

Data Source

Water Quality data from WaterByCounty. See full details at WaterByCounty. Data updated February 2026.