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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#1
Aberdeen
County, ID
100 A
#2
Dalton Gardens
County, ID
100 A
#3
Emmett
County, ID
100 A
#4
Genesee
County, ID
100 A
#5
Heyburn
County, ID
100 A
#6
Homedale
County, ID
100 A
#7
Lewiston
County, ID
100 A
#8
Marsing
County, ID
100 A
#9
Shoshone
County, ID
100 A
#10
Wallace
County, ID
100 A
#11
Wilder
County, ID
100 A
#12
American Falls
County, ID
98 A
#13
Coeur D Alene
County, ID
98 A
#14
Garden City
County, ID
98 A
#15
Hayden
County, ID
98 A
#16
Ketchum
County, ID
98 A
#17
Malad
County, ID
98 A
#18
Nampa
County, ID
98 A
#19
New Plymouth
County, ID
98 A
#20
Payette
County, ID
98 A
#21
St Anthony
County, ID
98 A
#22
St Maries
County, ID
98 A
#23
Sugar City
County, ID
98 A
#24
Athol
County, ID
97 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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