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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#49
Marion
County, IA
92 A
#50
May City
County, IA
92 A
#51
Sac City
County, IA
92 A
#52
Strawberry Point
County, IA
92 A
#53
Tabor
County, IA
92 A
#54
Urbana
County, IA
92 A
#55
Wellman
County, IA
92 A
#56
West Burlington
County, IA
92 A
#57
Carter Lake
County, IA
91 A
#58
Dunlap
County, IA
91 A
#59
Glidden
County, IA
91 A
#60
Dallas Center
County, IA
90 A
#61
Dyersville
County, IA
90 A
#62
Fayette
County, IA
90 A
#63
Grundy Center
County, IA
90 A
#64
Middletown
County, IA
90 A
#65
Northwood
County, IA
90 A
#66
Oelwein
County, IA
90 A
#67
Postville
County, IA
90 A
#68
Prairie City
County, IA
90 A
#69
Urbandale
County, IA
90 A
#70
Webster City
County, IA
90 A
#71
Atlantic
County, IA
88 B
#72
Bellevue
County, IA
88 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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