Infrastructure
Alaska vs Maine: Water Quality Score
Alaska has a higher water quality score than Maine.
National Rankings
Where They Rank Nationally
See where both states fall among all 50 states for water quality score.
Alaska
#5 · 97.7/100 (A)
Maine
#15 · 85.6/100 (A)
Lowest
Highest
Top 10 States — Water Quality Score
#1
Hawaii
99.9/100 (A)
Hawaii
#2
North Carolina
99.7/100 (A)
North Carolina
#3
New Hampshire
99.5/100 (A)
New Hampshire
#4
Louisiana
98.9/100 (A)
Louisiana
#5
Alaska
97.7/100 (A)
Alaska
#6
South Dakota
96.5/100 (A)
South Dakota
#7
New Mexico
95.9/100 (A)
New Mexico
#8
Indiana
95.2/100 (A)
Indiana
#9
Oregon
90.5/100 (A)
Oregon
#10
Vermont
88.2/100 (A)
Vermont
Selected states
#15
Maine
85.6/100 (A)
Maine
Alaska ranks 5th and Maine ranks 15th nationally for water quality score.
What this means
Alaska vs Maine: Water Quality Score in context
Alaska's water quality score is 97.7/100 (A), compared with 85.6/100 (A) in Maine, a gap of 14.1%. State tap-water score on a 100-point scale from the existing water-quality ranking.
Alaska
97.7/100 (A)
Maine
85.6/100 (A)
Difference
12.10 points
People also ask
Alaska vs Maine Water Quality Score — common questions
QWhat is Alaska's water quality score?
Alaska's water quality score is 97.7/100 (A).
QWhat is Maine's water quality score?
Maine's water quality score is 85.6/100 (A).
QWhich state has a higher water quality score — Alaska or Maine?
Alaska has a higher water quality score than Maine.
More comparisons: Alaska vs Maine
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Data source and freshness
Primary source
Data period
2026 ranking
Dataset reviewed
July 23, 2026
Method note
TapWaterData.com composite score; it is not an EPA regulatory compliance grade.