Question 1

Which county in Alaska has the best water quality?

Accepted Answer

Juneau City and Borough has the highest water quality score in Alaska at 100.0/100 (Grade: C), based on EPA SDWIS data.

Question 2

Which county in Alaska has the most water violations?

Accepted Answer

Yukon-Koyukuk Census Area has among the lowest water quality scores in Alaska at 73.9/100. See the individual county page for detailed violation history.

Question 3

Is the tap water safe to drink in Alaska?

Accepted Answer

Alaska has an average water quality score of 94.3/100 based on EPA Safe Drinking Water Act compliance data. Individual county scores vary — check your specific county's page for detailed information.

Question 4

What contaminants are found in Alaska water supplies?

Accepted Answer

Drinking water quality varies by county and water system. The EPA Safe Drinking Water Information System (SDWIS) tracks violations for contaminants like lead, nitrates, bacteria, and disinfection byproducts. See individual county pages for specific contaminant and violation history.

County	Water Score	Grade	Violations	Violation Rate
Juneau City and Borough	100.0	C	2	5.2%
Yakutat City and Borough	100.0	A	0	0.0%
Anchorage Municipality	99.9	C	38	13.1%
Fairbanks North Star Borough	99.9	D	30	19.6%
North Slope Borough	99.9	C	1	11.6%
Sitka City and Borough	99.8	F	5	52.4%
Aleutians West Census Area	99.2	F	17	165.8%
Matanuska-Susitna Borough	99.1	F	86	193.4%
Southeast Fairbanks Census Area	98.8	F	6	267.1%
Kenai Peninsula Borough	98.7	F	72	277.2%
Haines Borough	98.5	F	8	321.4%
Denali Borough	98.1	F	3	409.3%
Kodiak Island Borough	97.5	F	74	543.1%
Dillingham Census Area	97.2	F	31	601.4%
Ketchikan Gateway Borough	96.7	F	77	711.8%
Aleutians East Borough	94.9	F	28	1105.8%
Bristol Bay Borough	89.2	F	3	2362.2%
Bethel Census Area	87.6	F	400	2698.0%
Nome Census Area	86.9	F	295	2857.1%
Lake and Peninsula Borough	83.9	F	63	3519.6%
Northwest Arctic Borough	74.1	F	431	5656.2%
Yukon-Koyukuk Census Area	73.9	F	314	5688.4%
Chugach Census Area	—	—	—	—
Copper River Census Area	—	—	—	—
Hoonah-Angoon Census Area	—	—	—	—
Kusilvak Census Area	—	—	—	—
Petersburg Borough	—	—	—	—
Prince of Wales-Hyder Census Area	—	—	—	—
Skagway Municipality	—	—	—	—
Wrangell City and Borough	—	—	—	—

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