City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#1729
North Muskegon
County, MI
98 A
#1730 North Platte
County, NE
98 A
#1731 North Richland Hills
County, TX
98 A
#1732 Northampton
County, PA
98 A
#1733 Norton Shores
County, MI
98 A
#1734 Norwood
County, NY
98 A
#1735 O'Neill
County, NE
98 A
#1736 Oak Ridge
County, NJ
98 A
#1737 Ogallala
County, NE
98 A
#1738 Ogdensburg
County, NY
98 A
#1739 Omak
County, WA
98 A
#1740 Onalaska
County, WA
98 A
#1741 Onawa
County, IA
98 A
#1742 Oral
County, SD
98 A
#1743 Ord
County, NE
98 A
#1744 Organ
County, NM
98 A
#1745 Orono
County, MN
98 A
#1746 Oroville
County, WA
98 A
#1747 Orting
County, WA
98 A
#1748 Owatonna
County, MN
98 A
#1749 Pacifica
County, CA
98 A
#1750 Palm Desert
County, CA
98 A
#1751 Palmyra
County, WI
98 A
#1752 Palomar Mtn Road
County, CA
98 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.