WaterQ

City Water Quality Rankings in Iowa

270 cities ranked by drinking water quality.

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Popular city water quality comparisons

Asbury, IA vs Brooklyn, IA Compare → Coon Rapids, IA vs Dike, IA Compare → Durant, IA vs Eldora, IA Compare → Hartley, IA vs Iowa Falls, IA Compare →

Trending Cities

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#97
Spencer
County, IA
85 B
#98
Emmetsburg
County, IA
84 B
#99
Letts
County, IA
84 B
#100
Mount Vernon
County, IA
84 B
#101
Muscatine
County, IA
84 B
#102
Sheffield
County, IA
84 B
#103
Wapello
County, IA
84 B
#104
Washington
County, IA
84 B
#105
Waterloo
County, IA
84 B
#106
Woodward
County, IA
84 B
#107
Johnston
County, IA
83 B
#108
Rock Rapids
County, IA
83 B
#109
Rockwell City
County, IA
83 B
#110
Alta
County, IA
82 B
#111
Arnolds Park
County, IA
82 B
#112
Atkins
County, IA
82 B
#113
Audubon
County, IA
82 B
#114
Charles City
County, IA
82 B
#115
Dysart
County, IA
82 B
#116
Holstein
County, IA
82 B
#117
Ida Grove
County, IA
82 B
#118
Ireton
County, IA
82 B
#119
New Hampton
County, IA
82 B
#120
Ogden
County, IA
82 B

Frequently Asked Questions

How are city water quality rankings calculated in Iowa?

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 Iowa?

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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