City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#3001
Pateros
County, WA
95 A
#3002 Patuxent River
County, MD
95 A
#3003 Pawtucket
County, RI
95 A
#3004 Payne
County, OH
95 A
#3005 Petersburg
County, VA
95 A
#3006 Peyton
County, CO
95 A
#3007 Philomath
County, OR
95 A
#3008 Pilot Rock
County, OR
95 A
#3009 Pine Ridge
County, SD
95 A
#3010 Pittsville
County, MD
95 A
#3011 Plymouth
County, MI
95 A
#3012 Pollock
County, LA
95 A
#3013 Port Henry
County, NY
95 A
#3014 Portsmouth
County, NH
95 A
#3015 Puyallup
County, WA
95 A
#3016 Rapid City
County, SD
95 A
#3017 Ravenna
County, NE
95 A
#3018 Red Hook
County, NY
95 A
#3019 Rittman
County, OH
95 A
#3020 Rockville
County, VA
95 A
#3021 Rocky Comfort
County, MO
95 A
#3022 Ruther Glen
County, VA
95 A
#3023 Salem
County, IL
95 A
#3024 San Marcos
County, CA
95 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.