WaterQ

City Water Quality Rankings in Iowa

268 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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#169
Alton
County, IA
72 C
#170
Clarion
County, IA
72 C
#171
Johnston
County, IA
72 C
#172
Laporte City
County, IA
72 C
#173
Lisbon
County, IA
72 C
#174
Mechanicsville
County, IA
72 C
#175
North Liberty
County, IA
72 C
#176
Sigourney
County, IA
72 C
#177
Slater
County, IA
71 C
#178
Central City
County, IA
70 C
#179
Earlham
County, IA
70 C
#180
Hospers
County, IA
70 C
#181
Jewell
County, IA
70 C
#182
Melcher Dallas
County, IA
70 C
#183
Osage
County, IA
70 C
#184
Riverside
County, IA
70 C
#185
Sergeant Bluff
County, IA
70 C
#186
Hudson
County, IA
69 C
#187
Manly
County, IA
69 C
#188
Gladbrook
County, IA
68 C
#189
Guttenberg
County, IA
68 C
#190
Sioux City
County, IA
68 C
#191
Tipton
County, IA
68 C
#192
Waukee
County, IA
68 C

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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