City Water Quality Rankings in Oklahoma
267 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#25
Thomas
County, OK
82 B
#26 Stonewall
County, OK
81 B
#27 Lindsay
County, OK
80 B
#28 South Coffeyville
County, OK
80 B
#29 Buffalo
County, OK
78 B
#30 Elk City
County, OK
78 B
#31 Enid
County, OK
78 B
#32 Fairland
County, OK
78 B
#33 Fort Gibson
County, OK
78 B
#34 Weatherford
County, OK
78 B
#35 Chouteau
County, OK
77 B
#36 Earlsboro
County, OK
77 B
#37 Minco
County, OK
77 B
#38 Geronimo
County, OK
76 B
#39 Meeker
County, OK
76 B
#40 Colony
County, OK
75 B
#41 Marshall
County, OK
74 C
#42 Owasso
County, OK
74 C
#43 Thackerville
County, OK
74 C
#44 Waukomis
County, OK
74 C
#45 Carnegie
County, OK
73 C
#46 Crescent
County, OK
73 C
#47 Woodward
County, OK
73 C
#48 Carter
County, OK
72 C
Frequently Asked Questions
How are city water quality rankings calculated in Oklahoma?
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 Oklahoma?
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.