City Water Quality Rankings in Maryland
91 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#73
Myersville
County, MD
86 B
#74 Ocean City
County, MD
86 B
#75 Thurmont
County, MD
86 B
#76 Centreville
County, MD
84 B
#77 Chestertown
County, MD
83 B
#78 Pocomoke City
County, MD
82 B
#79 Snow Hill
County, MD
82 B
#80 Poolesville
County, MD
80 B
#81 Emmitsburg
County, MD
78 B
#82 Sykesville
County, MD
78 B
#83 Beltsville
County, MD
76 B
#84 Hagerstown
County, MD
71 C
#85 St Michaels
County, MD
70 C
#86 Phoenix
County, MD
69 C
#87 Westernport
County, MD
69 C
#88 Lonaconing
County, MD
36 F
#89 Havre De Grace
County, MD
0 F
#90 North East
County, MD
0 F
#91 Perryville
County, MD
0 F
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.