City Water Quality Rankings in Missouri
336 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#289
Cape Girardeau
County, MO
64 C
#290 Laquey
County, MO
64 C
#291 Mountain Grove
County, MO
64 C
#292 Stover
County, MO
64 C
#293 Ava
County, MO
63 C
#294 Richland
County, MO
63 C
#295 Lathrop
County, MO
62 C
#296 Liberty
County, MO
61 C
#297 Reeds Spring
County, MO
61 C
#298 Seneca
County, MO
61 C
#299 Versailles
County, MO
61 C
#300 Pacific
County, MO
60 C
#301 Portageville
County, MO
60 C
#302 St. Louis
County, MO
59 D
#303 Hannibal
County, MO
57 D
#304 Roach
County, MO
57 D
#305 Boonville
County, MO
56 D
#306 Potosi
County, MO
56 D
#307 Purdin
County, MO
56 D
#308 Sparta
County, MO
54 D
#309 Sarcoxie
County, MO
51 D
#310 Senath
County, MO
51 D
#311 Chesterfield
County, MO
50 D
#312 Lake Ozark
County, MO
50 D
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.