City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#10033
Lone Star
County, TX
52 D
#10034 Mercer
County, PA
52 D
#10035 Mercersburg
County, PA
52 D
#10036 Midlothian
County, IL
52 D
#10037 Mount Pleasant
County, IA
52 D
#10038 Natchez
County, LA
52 D
#10039 Nederland
County, CO
52 D
#10040 New Lisbon
County, NJ
52 D
#10041 New Port Richey
County, FL
52 D
#10042 Ninnekah
County, OK
52 D
#10043 Norwalk
County, IA
52 D
#10044 Orbisonia
County, PA
52 D
#10045 Pheba
County, MS
52 D
#10046 Pickens
County, MS
52 D
#10047 Plymouth
County, MA
52 D
#10048 Ratcliff
County, AR
52 D
#10049 Rhome
County, TX
52 D
#10050 Roseland
County, LA
52 D
#10051 Russell
County, MA
52 D
#10052 San Tan Valley
County, AZ
52 D
#10053 Sebastian
County, TX
52 D
#10054 Sidney
County, IA
52 D
#10055 South Royalton
County, VT
52 D
#10056 Stark
County, KS
52 D
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.