Maryland Water Quality Reports
Comprehensive water quality data for 226 cities across Maryland. View EPA-verified contaminant levels and get filter recommendations.
226
Cities
51
Safe
160
Monitor
15
At Risk
Water Quality by County
Explore aggregated water quality scores across Maryland counties. Scores are calculated based on EPA data and weighted by population.
Loading map...
Data from 211 cities serving 5,232,521 people across 22 counties.
Common Contaminants in Maryland
175 cities in Maryland have at least one contaminant above EPA health guidelines.
Worried about Bromodichloromethane in your water?
Upload your water test (PDF or a photo) and we'll email a plain-English reading of your Bromodichloromethane result β and every other number β free. Educational only, no medical claims.
Your upload also helps us keep local water data accurate β we only ever share anonymized, area-level summaries.
Upload my testCities in Maryland
Takoma Park
People Served2532K
Contaminants Tested89
Above Guidelines2
View Report β
Baltimore
People Served1600K
Contaminants Tested20
Above Guidelines7
View Report β
Rockville
People Served684K
Contaminants Tested90
Above Guidelines2
View Report β
College Park
People Served632K
Contaminants Tested79
Above Guidelines2
View Report β
Adelphi
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Ashton-Sandy Spring
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Aspen Hill
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Beltsville
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Berwyn Heights
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Bethesda
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Bladensburg
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Brentwood
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Brookeville
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Brookmont
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Burnt Mills
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Burtonsville
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Cabin John
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Calverton
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Capitol Heights
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Cedar Heights
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Cheverly
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Chevy Chase Section Five
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Chevy Chase Section Three
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Chevy Chase View
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Chevy Chase Village
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Chevy Chase
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Chillum
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Cloverly
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Colesville
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Colmar Manor
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Coral Hills
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Cottage City
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Darnestown
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Derwood
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
District Heights
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
East Riverdale
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Edmonston
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Fairland
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Fairmount Heights
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Forest Glen
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Forest Heights
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Four Corners
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Friendship Heights Village
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Gaithersburg
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Garrett Park
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Glassmanor
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Glen Echo
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Glenarden
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Glenmont
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Greenbelt
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Hillandale
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Hillcrest Heights
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Hyattsville
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Kemp Mill
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Kensington
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Konterra
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Landover Hills
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Landover
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Langley Park
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Lanham
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Laurel
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Layhill
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Leisure World
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Marlow Heights
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Martin's Additions
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Maryland Park
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Mount Rainier
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
National Harbor
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
New Carrollton
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
North Bethesda
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
North Brentwood
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
North Chevy Chase
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
North Kensington
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
North Potomac
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Olney
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Oxon Hill
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Peppermill Village
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Potomac
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Redland
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Riverdale Park
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Seabrook
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Seat Pleasant
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Silver Hill
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Silver Spring
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Somerset
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
South Kensington
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
South Laurel
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Spencerville
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Springdale
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Suitland
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Summerfield
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Temple Hills
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Travilah
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
University Park
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Walker Mill
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Washington Grove
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Wheaton
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
White Oak
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Woodlawn
People Served632K
Contaminants Tested19
Above Guidelines2
View Report β
Severna Park
People Served291K
Contaminants Tested254
Above Guidelines2
View Report β
Showing top 100 of 226 cities by population.
Use the search box above to find any city in Maryland.
Stay Informed About Your Water Quality
Get EPA reports, filter recommendations, and safety alerts for your area.
Join 10,000+ people protecting their families. Unsubscribe anytime.