City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#4105
Kinston
County, NC
92 A
#4106 Kittery
County, ME
92 A
#4107 Klondike
County, TX
92 A
#4108 La Crosse
County, KS
92 A
#4109 La Luz
County, NM
92 A
#4110 La Marque
County, TX
92 A
#4111 La Palma
County, CA
92 A
#4112 La Pine
County, OR
92 A
#4113 Lake Almanor
County, CA
92 A
#4114 Lake Dallas
County, TX
92 A
#4115 Lake Luzerne
County, NY
92 A
#4116 Lake Oswego
County, OR
92 A
#4117 Lake Winnebago
County, MO
92 A
#4118 Lakeway
County, TX
92 A
#4119 Lakewood
County, NJ
92 A
#4120 Lamar
County, SC
92 A
#4121 Lancaster
County, WI
92 A
#4122 Lanesborough
County, MA
92 A
#4123 Lansdale
County, PA
92 A
#4124 Larue
County, TX
92 A
#4125 Lathrup Village
County, MI
92 A
#4126 Laurinburg
County, NC
92 A
#4127 Ledyard
County, CT
92 A
#4128 Lee Center
County, NY
92 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.