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.