WaterQ

City Water Quality Rankings in Missouri

335 cities ranked by drinking water quality.

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Popular city water quality comparisons

Ashland, MO vs Carthage, MO Compare → Clarksdale, MO vs Cosby, MO Compare → Dekalb, MO vs Fair Grove, MO Compare → Fillmore, MO vs Freeman, MO Compare →

Trending Cities

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#25
Williamstown
County, MO
99 A
#26
Exeter
County, MO
98 A
#27
Grain Valley
County, MO
98 A
#28
Hilsboro
County, MO
98 A
#29
Morley
County, MO
98 A
#30
Springfield
County, MO
98 A
#31
Osage Beach
County, MO
97 A
#32
Ridgedale
County, MO
97 A
#33
Rockport
County, MO
97 A
#34
Trenton
County, MO
97 A
#35
Wheatland
County, MO
97 A
#36
Barnhart
County, MO
96 A
#37
Desloge
County, MO
96 A
#38
Excelsior Springs
County, MO
96 A
#39
Festus
County, MO
96 A
#40
Gerald
County, MO
96 A
#41
Grandview
County, MO
96 A
#42
Herculaneum
County, MO
96 A
#43
Holts Summit
County, MO
96 A
#44
House Springs
County, MO
96 A
#45
Huntsville
County, MO
96 A
#46
Laplata
County, MO
96 A
#47
Mokane
County, MO
96 A
#48
Montgomery City
County, MO
96 A

Frequently Asked Questions

How are city water quality rankings calculated in Missouri?

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 Missouri?

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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