WaterQ

City Water Quality Rankings

11,696 cities ranked by drinking water quality.

Popular city water quality comparisons

Trending Cities

#817
Oswego
County, NY
100 A
#818
Otsego
County, MN
100 A
#819
Oxford
County, GA
100 A
#820
Oxford
County, NY
100 A
#821
Oyster Bay
County, NY
100 A
#822
Pacolet
County, SC
100 A
#823
Palestine
County, AR
100 A
#824
Palm Valley
County, TX
100 A
#825
Palmyra
County, NY
100 A
#826
Palomar Mountain
County, CA
100 A
#827
Palouse
County, WA
100 A
#828
Pandora
County, OH
100 A
#829
Paoli
County, IN
100 A
#830
Papillion
County, NE
100 A
#831
Parkers Prairie
County, MN
100 A
#832
Pasco
County, WA
100 A
#833
Patterson
County, NY
100 A
#834
Pattison
County, TX
100 A
#835
Paw Paw
County, MI
100 A
#836
Payson
County, IL
100 A
#837
Pea Ridge
County, AR
100 A
#838
Pender
County, NE
100 A
#839
Pendleton
County, SC
100 A
#840
Peosta
County, IA
100 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.

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