WaterQ

City Water Quality Rankings in Montana

83 cities ranked by drinking water quality.

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Popular city water quality comparisons

Big Timber, MT vs Bigfork, MT Compare → Black Eagle, MT vs Fort Benton, MT Compare → Fort Harrison, MT vs Glasgow, MT Compare → Lakeside, MT vs Plentywood, MT Compare →

Trending Cities

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#1
Big Timber
County, MT
100 A
#2
Bigfork
County, MT
100 A
#3
Black Eagle
County, MT
100 A
#4
Fort Benton
County, MT
100 A
#5
Fort Harrison
County, MT
100 A
#6
Glasgow
County, MT
100 A
#7
Lakeside
County, MT
100 A
#8
Plentywood
County, MT
100 A
#9
West Glacier
County, MT
100 A
#10
West Yellowstone
County, MT
100 A
#11
Wolf Point
County, MT
100 A
#12
Conrad
County, MT
98 A
#13
Eureka
County, MT
98 A
#14
Hamilton
County, MT
98 A
#15
Lewistown
County, MT
98 A
#16
Red Lodge
County, MT
98 A
#17
Townsend
County, MT
98 A
#18
Big Sky
County, MT
97 A
#19
Billings
County, MT
97 A
#20
Roundup
County, MT
97 A
#21
Shelby
County, MT
97 A
#22
Whitefish
County, MT
97 A
#23
Absarokee
County, MT
96 A
#24
Choteau
County, MT
96 A

Frequently Asked Questions

How are city water quality rankings calculated in Montana?

WaterQ city rankings are based on EPA SDWIS data across local public water systems, including contaminant detections, compliance violations, and recency-weighted score signals.

Can I compare two cities in Montana?

Yes. Use the city comparison links on this page or open the Compare tool to evaluate two cities side by side on score, grade, and water system coverage.

How often does WaterQ refresh city data?

City-level metrics refresh when new EPA data is processed. Check city pages for latest score and violation context.

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