City Water Quality Rankings in Maryland
91 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#1
Annapolis
County, MD
100 A
#2 Bethesda
County, MD
100 A
#3 Boonsboro
County, MD
100 A
#4 Chrisfield
County, MD
100 A
#5 Delmar
County, MD
100 A
#6 Federalsburg
County, MD
100 A
#7 Funkstown
County, MD
100 A
#8 Hebron
County, MD
100 A
#9 Largo
County, MD
100 A
#10 Laurel
County, MD
100 A
#11 Middletown
County, MD
100 A
#12 Mount Airy
County, MD
100 A
#13 Mountain Lake Park
County, MD
100 A
#14 Ridgely
County, MD
100 A
#15 Rockville
County, MD
100 A
#16 Silver Spring
County, MD
100 A
#17 St. Leonard
County, MD
100 A
#18 Taneytown
County, MD
100 A
#19 Denton
County, MD
99 A
#20 Dunkirk
County, MD
99 A
#21 Prince Frederick
County, MD
99 A
#22 Stevensville
County, MD
99 A
#23 Walkersville
County, MD
99 A
#24 Columbia
County, MD
98 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.