Water Quality in Maryland

Water hardness and contaminant data for 4 cities across Maryland. Find your city below to see a detailed water quality profile.

4
Cities
59
Avg Hardness (PPM)
69
Hardest City (PPM)

Maryland Cities by Water Hardness

CityHardness (PPM)LevelPFAS (ppt)Source
Frederick 69 Moderately Hard 3 Monocacy River watershed
Rockville 61 Moderately Hard 4 Potomac River
Baltimore 60 Moderately Hard 5 Liberty + Prettyboy Reservoirs
Annapolis 45 Slightly Hard 4 Chesapeake Bay watershed wells