WaterQ

City Water Quality Rankings in Idaho

90 cities ranked by drinking water quality.

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Popular city water quality comparisons

Aberdeen, ID vs Dalton Gardens, ID Compare → Emmett, ID vs Genesee, ID Compare → Heyburn, ID vs Homedale, ID Compare → Lewiston, ID vs Marsing, ID Compare →

Trending Cities

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#25
Post Falls
County, ID
97 A
#26
Rathdrum
County, ID
97 A
#27
Bonners Ferry
County, ID
96 A
#28
Chubbuck
County, ID
96 A
#29
Eagle
County, ID
96 A
#30
Hauser
County, ID
96 A
#31
Iona
County, ID
96 A
#32
Kuna
County, ID
96 A
#33
Meridian
County, ID
96 A
#34
Middleton
County, ID
96 A
#35
Moscow
County, ID
96 A
#36
Pinehurst
County, ID
96 A
#37
Soda Springs
County, ID
96 A
#38
Ucon
County, ID
96 A
#39
Victor
County, ID
96 A
#40
Worley
County, ID
96 A
#41
Gooding
County, ID
95 A
#42
Kimberly
County, ID
95 A
#43
Shelley
County, ID
95 A
#44
Grangeville
County, ID
94 A
#45
Mountain Home Afb
County, ID
94 A
#46
Moyie Springs
County, ID
94 A
#47
Paul
County, ID
94 A
#48
Plummer
County, ID
94 A

Frequently Asked Questions

How are city water quality rankings calculated in Idaho?

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 Idaho?

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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