City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#3817
Phoenix
County, OR
93 A
#3818 Pico Rivera
County, CA
93 A
#3819 Pine Level
County, AL
93 A
#3820 Plattsmouth
County, NE
93 A
#3821 Polson
County, MT
93 A
#3822 Port Allen
County, LA
93 A
#3823 Port Byron
County, NY
93 A
#3824 Posen
County, IL
93 A
#3825 Poughkeepsie
County, NY
93 A
#3826 Princeton
County, TX
93 A
#3827 Rock Hill
County, NY
93 A
#3828 Rothschild
County, WI
93 A
#3829 San Dimas
County, CA
93 A
#3830 Schererville
County, IN
93 A
#3831 Silverthorne
County, CO
93 A
#3832 Skiatook
County, OK
93 A
#3833 Smithfield
County, VA
93 A
#3834 Snoqualmie Pass
County, WA
93 A
#3835 Somerset
County, PA
93 A
#3836 South Heights
County, PA
93 A
#3837 South Point
County, OH
93 A
#3838 Sparta
County, TN
93 A
#3839 Springville
County, TN
93 A
#3840 Stateline
County, NV
93 A
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.