City Water Quality Rankings in Oklahoma
272 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#25
Bison
County, OK
86 B
#26 Buffalo
County, OK
86 B
#27 Sulphur
County, OK
86 B
#28 Ketchum
County, OK
84 B
#29 Fairland
County, OK
82 B
#30 Thomas
County, OK
82 B
#31 Earlsboro
County, OK
81 B
#32 Lindsay
County, OK
80 B
#33 Minco
County, OK
80 B
#34 Crescent
County, OK
79 B
#35 Fort Gibson
County, OK
79 B
#36 Marlow
County, OK
79 B
#37 Colony
County, OK
78 B
#38 Elk City
County, OK
78 B
#39 Enid
County, OK
78 B
#40 Geronimo
County, OK
78 B
#41 Weatherford
County, OK
78 B
#42 Carnegie
County, OK
77 B
#43 Chouteau
County, OK
77 B
#44 Lawton
County, OK
77 B
#45 Oklahoma City
County, OK
77 B
#46 Sand Springs
County, OK
77 B
#47 Woodward
County, OK
77 B
#48 Big Cabin
County, OK
76 B
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.