City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#2641
Orange Beach
County, AL
96 A
#2642 Orangeburg
County, NY
96 A
#2643 Orangevale
County, CA
96 A
#2644 Oregon
County, OH
96 A
#2645 Ossian
County, IN
96 A
#2646 Owensville
County, MO
96 A
#2647 Oxford
County, AR
96 A
#2648 Oxford
County, NC
96 A
#2649 Ozark
County, AL
96 A
#2650 Painted Post
County, NY
96 A
#2651 Palo Alto
County, CA
96 A
#2652 Pamplico
County, SC
96 A
#2653 Panhandle
County, TX
96 A
#2654 Paris
County, TN
96 A
#2655 Park Hills
County, MO
96 A
#2656 Pascoag
County, RI
96 A
#2657 Patterson
County, CA
96 A
#2658 Pearlington
County, MS
96 A
#2659 Pendleton
County, IN
96 A
#2660 Peru
County, IN
96 A
#2661 Peterman
County, AL
96 A
#2662 Petersburg
County, MI
96 A
#2663 Petrolia
County, PA
96 A
#2664 Phelan
County, CA
96 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.