City Water Quality Rankings in Missouri
335 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#313
Senath
County, MO
54 D
#314 Eldon
County, MO
53 D
#315 Lake Ozark
County, MO
53 D
#316 Macks Creek
County, MO
53 D
#317 Loose Creek
County, MO
51 D
#318 Chesterfield
County, MO
50 D
#319 Memphis
County, MO
50 D
#320 Sweet Springs
County, MO
50 D
#321 Worth
County, MO
50 D
#322 Maryville
County, MO
48 D
#323 Farmington
County, MO
44 F
#324 Clarkton
County, MO
43 F
#325 Slater
County, MO
43 F
#326 Oran
County, MO
40 F
#327 Malden
County, MO
34 F
#328 Piedmont
County, MO
30 F
#329 Lampe
County, MO
23 F
#330 Archie
County, MO
0 F
#331 King City
County, MO
0 F
#332 Leadwood
County, MO
0 F
#333 Louisiana
County, MO
0 F
#334 Maysville
County, MO
0 F
#335 Monroe
County, MO
0 F
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.