WaterQ

City Water Quality Rankings in Iowa

270 cities ranked by drinking water quality.

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Popular city water quality comparisons

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Trending Cities

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#25
Dewitt
County, IA
96 A
#26
Guthrie Center
County, IA
96 A
#27
Harlan
County, IA
96 A
#28
Independence
County, IA
96 A
#29
New London
County, IA
96 A
#30
Springville
County, IA
96 A
#31
Avoca
County, IA
95 A
#32
Eagle Grove
County, IA
95 A
#33
Belmond
County, IA
94 A
#34
Carroll
County, IA
94 A
#35
Clear Lake
County, IA
94 A
#36
Decorah
County, IA
94 A
#37
Denison
County, IA
94 A
#38
Elk Run Heights
County, IA
94 A
#39
Estherville
County, IA
94 A
#40
Greenfield
County, IA
94 A
#41
Storm Lake
County, IA
94 A
#42
Treynor
County, IA
94 A
#43
Wilton
County, IA
94 A
#44
Burlington
County, IA
92 A
#45
Gilbert
County, IA
92 A
#46
Hampton
County, IA
92 A
#47
Humboldt
County, IA
92 A
#48
Marcus
County, IA
92 A

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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