City Water Quality Rankings
11,561 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#11353
Ola
County, AR
0 F
#11354 Ontonagon
County, MI
0 F
#11355 Oolitic
County, IN
0 F
#11356 Osceola
County, IA
0 F
#11357 Ouray
County, CO
0 F
#11358 Overton
County, TX
0 F
#11359 Oxford
County, AL
0 F
#11360 Paden City
County, WV
0 F
#11361 Paducah
County, KY
0 F
#11362 Pago Pago
County, AS
0 F
#11363 Paintsville
County, KY
0 F
#11364 Palmer
County, AK
0 F
#11365 Palmetto
County, LA
0 F
#11366 Panama
County, OK
0 F
#11367 Parchman
County, MS
0 F
#11368 Pauma Valley
County, CA
0 F
#11369 Pawling
County, NY
0 F
#11370 Pawnee
County, OK
0 F
#11371 Peach Springs
County, AZ
0 F
#11372 Pella
County, IA
0 F
#11373 Peralta
County, NM
0 F
#11374 Perkins
County, OK
0 F
#11375 Perryville
County, MD
0 F
#11376 Peterman
County, AL
0 F
Frequently Asked Questions
How are city water quality rankings calculated?
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 US cities directly?
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.