City Water Quality Rankings in Maryland
91 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#25
Lavale
County, MD
98 A
#26 Millersville
County, MD
98 A
#27 Perry Point
County, MD
98 A
#28 Princess Anne
County, MD
98 A
#29 Dunkirk
County, MD
97 A
#30 Port Republic
County, MD
97 A
#31 Cumberland
County, MD
96 A
#32 Ellicott City
County, MD
96 A
#33 Fort Meade
County, MD
96 A
#34 Fruitland
County, MD
96 A
#35 Hampstead
County, MD
96 A
#36 Patuxent River
County, MD
96 A
#37 Severn
County, MD
96 A
#38 Sherwood Forest
County, MD
96 A
#39 Bowie
County, MD
95 A
#40 California
County, MD
95 A
#41 Frederick
County, MD
95 A
#42 New Windsor
County, MD
95 A
#43 Pasadena
County, MD
95 A
#44 Pittsville
County, MD
95 A
#45 Smithsburg
County, MD
95 A
#46 Stevenson
County, MD
95 A
#47 Wye Mills
County, MD
95 A
#48 Brunswick
County, MD
94 A
Frequently Asked Questions
How are city water quality rankings calculated in Maryland?
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 cities in Maryland?
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.