City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#8401
Oakley
County, UT
73 C
#8402 Ogden
County, UT
73 C
#8403 Ogdensburg
County, NJ
73 C
#8404 Onset
County, MA
73 C
#8405 Pennington
County, NJ
73 C
#8406 Pennsboro
County, WV
73 C
#8407 Peoria
County, AZ
73 C
#8408 Perryville
County, MO
73 C
#8409 Pierce City
County, MO
73 C
#8410 Plantersville
County, TX
73 C
#8411 Poncha Springs
County, CO
73 C
#8412 Princeton
County, IL
73 C
#8413 Provo
County, UT
73 C
#8414 Questa
County, NM
73 C
#8415 Rantoul
County, IL
73 C
#8416 Richton
County, MS
73 C
#8417 River Grove
County, IL
73 C
#8418 Rockton
County, IL
73 C
#8419 Rolling Meadows
County, IL
73 C
#8420 Sandy
County, UT
73 C
#8421 Sarasota
County, FL
73 C
#8422 Saratoga Springs
County, NY
73 C
#8423 Scappoose
County, OR
73 C
#8424 Schiller Park
County, IL
73 C
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.