City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#1633
Lavernia
County, TX
98 A
#1634 Lawrenceville
County, GA
98 A
#1635 Lebanon
County, NH
98 A
#1636 Lennox
County, SD
98 A
#1637 Leoma
County, TN
98 A
#1638 Lewistown
County, MT
98 A
#1639 Liberty Center
County, OH
98 A
#1640 Lincoln City
County, OR
98 A
#1641 Litchfield
County, MI
98 A
#1642 Little America
County, WY
98 A
#1643 Lochbuie
County, CO
98 A
#1644 Lockhart
County, TX
98 A
#1645 Lompoc
County, CA
98 A
#1646 Long Beach
County, NY
98 A
#1647 Longview
County, TX
98 A
#1648 Lopez Island
County, WA
98 A
#1649 Los Alamos
County, NM
98 A
#1650 Los Molinos
County, CA
98 A
#1651 Loveland
County, OH
98 A
#1652 Lovettsville
County, VA
98 A
#1653 Lowell
County, AR
98 A
#1654 Lowell
County, MI
98 A
#1655 Lowell
County, OH
98 A
#1656 Lucas
County, TX
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.