City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#2113
Plymouth
County, IN
97 A
#2114 Plymouth
County, WI
97 A
#2115 Pomeroy
County, WA
97 A
#2116 Port Huron
County, MI
97 A
#2117 Port Republic
County, MD
97 A
#2118 Post Falls
County, ID
97 A
#2119 Poulsbo
County, WA
97 A
#2120 Prattville
County, AL
97 A
#2121 Pulaski
County, VA
97 A
#2122 Quartz Hill
County, CA
97 A
#2123 Quincy
County, CA
97 A
#2124 Quincy
County, WA
97 A
#2125 Quinton
County, AL
97 A
#2126 Rainier
County, WA
97 A
#2127 Rathdrum
County, ID
97 A
#2128 Reelsville
County, IN
97 A
#2129 Rehoboth Beach
County, DE
97 A
#2130 Rensselaer
County, NY
97 A
#2131 Ridgedale
County, MO
97 A
#2132 Rockport
County, MO
97 A
#2133 Rolla
County, ND
97 A
#2134 Rossville
County, TN
97 A
#2135 Roundup
County, MT
97 A
#2136 Royal City
County, WA
97 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.