City Water Quality Rankings in Iowa
268 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#193
Algona
County, IA
66 C
#194 Mapleton
County, IA
66 C
#195 Rockwell
County, IA
66 C
#196 Buffalo
County, IA
64 C
#197 Cascade
County, IA
64 C
#198 Colfax
County, IA
64 C
#199 Lake View
County, IA
64 C
#200 Monticello
County, IA
64 C
#201 Villisca
County, IA
64 C
#202 Waverly
County, IA
64 C
#203 Fairfield
County, IA
63 C
#204 Milford
County, IA
63 C
#205 Tama
County, IA
63 C
#206 Ankeny
County, IA
62 C
#207 Aplington
County, IA
62 C
#208 Center Point
County, IA
62 C
#209 Elkader
County, IA
62 C
#210 Ely
County, IA
62 C
#211 Monona
County, IA
62 C
#212 Story City
County, IA
62 C
#213 Calmar
County, IA
60 C
#214 Granger
County, IA
59 D
#215 West Branch
County, IA
58 D
#216 Carlisle
County, IA
57 D
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.