City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#7105
Marysville
County, KS
81 B
#7106 Mesa
County, WA
81 B
#7107 Millry
County, AL
81 B
#7108 Monroe
County, OH
81 B
#7109 Morrisville
County, NY
81 B
#7110 Mound Valley
County, KS
81 B
#7111 Mount Olive
County, MS
81 B
#7112 Netcong
County, NJ
81 B
#7113 New Ellenton
County, SC
81 B
#7114 North Ogden
County, UT
81 B
#7115 Northeast Harbor
County, ME
81 B
#7116 Norton
County, MA
81 B
#7117 Osborne
County, KS
81 B
#7118 Ottumwa
County, IA
81 B
#7119 Palos Heights
County, IL
81 B
#7120 Pennington
County, TX
81 B
#7121 Pocahontas
County, IL
81 B
#7122 Quincy
County, FL
81 B
#7123 Qulin
County, MO
81 B
#7124 Raeford
County, NC
81 B
#7125 Ripley
County, MS
81 B
#7126 Rogue River
County, OR
81 B
#7127 Rushville
County, IN
81 B
#7128 Salem
County, SC
81 B
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.