City Water Quality Rankings in Oklahoma
267 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#1
Erick
County, OK
100 A
#2 Mcloud
County, OK
100 A
#3 Quapaw
County, OK
100 A
#4 Wyandotte
County, OK
100 A
#5 Allen
County, OK
98 A
#6 Concho
County, OK
98 A
#7 Tinker Afb
County, OK
94 A
#8 Westville
County, OK
94 A
#9 Skiatook
County, OK
93 A
#10 Norman
County, OK
92 A
#11 Yukon
County, OK
92 A
#12 Blanchard
County, OK
90 A
#13 Cushing
County, OK
90 A
#14 Drumright
County, OK
90 A
#15 Glenpool
County, OK
90 A
#16 Purcell
County, OK
90 A
#17 Stuart
County, OK
89 B
#18 Del City
County, OK
88 B
#19 Roland
County, OK
88 B
#20 Ada
County, OK
86 B
#21 Bison
County, OK
86 B
#22 Sulphur
County, OK
86 B
#23 Ketchum
County, OK
84 B
#24 Seminole
County, OK
84 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.