D.C. WATER AND SEWER AUTHORITY
Serving 135 cities in DC, MD, VA
Monitor
3 above health guidelines
632K
People Served
135
Cities
3
Water Sources
0
MCL Violations
Is D.C. WATER AND SEWER AUTHORITY Water Safe to Drink?
D.C. WATER AND SEWER AUTHORITY has reported 3 contaminants above EPA health-based guidelines (MCLGs) in at least one city served. We recommend reviewing individual city reports below for specific water quality details.
This utility serves 632,323 people across 135 cities in DC, MD, VA. Water quality can vary by location within the service area. Check individual city pages below for detailed contaminant data specific to your area.
D.C. WATER AND SEWER AUTHORITY Service Area
Washington, DC
19+ contaminants tested
2 above guidelines
Monitor
Adelphi, MD
19+ contaminants tested
2 above guidelines
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Ashton-Sandy Spring, MD
19+ contaminants tested
2 above guidelines
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Aspen Hill, MD
19+ contaminants tested
2 above guidelines
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Beltsville, MD
19+ contaminants tested
2 above guidelines
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Berwyn Heights, MD
19+ contaminants tested
2 above guidelines
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Bethesda, MD
19+ contaminants tested
2 above guidelines
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Bladensburg, MD
19+ contaminants tested
2 above guidelines
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Brentwood, MD
19+ contaminants tested
2 above guidelines
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Brookeville, MD
19+ contaminants tested
2 above guidelines
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Brookmont, MD
19+ contaminants tested
2 above guidelines
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Burnt Mills, MD
19+ contaminants tested
2 above guidelines
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Burtonsville, MD
19+ contaminants tested
2 above guidelines
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Cabin John, MD
19+ contaminants tested
2 above guidelines
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Calverton, MD
19+ contaminants tested
2 above guidelines
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Capitol Heights, MD
19+ contaminants tested
2 above guidelines
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Cedar Heights, MD
19+ contaminants tested
2 above guidelines
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Cheverly, MD
19+ contaminants tested
2 above guidelines
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Chevy Chase, MD
19+ contaminants tested
2 above guidelines
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Chevy Chase Section Five, MD
19+ contaminants tested
2 above guidelines
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Chevy Chase Section Three, MD
19+ contaminants tested
2 above guidelines
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Chevy Chase View, MD
19+ contaminants tested
2 above guidelines
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Chevy Chase Village, MD
19+ contaminants tested
2 above guidelines
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Chillum, MD
19+ contaminants tested
2 above guidelines
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Cloverly, MD
19+ contaminants tested
2 above guidelines
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Colesville, MD
19+ contaminants tested
2 above guidelines
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College Park, MD
19+ contaminants tested
2 above guidelines
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Colmar Manor, MD
19+ contaminants tested
2 above guidelines
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Coral Hills, MD
19+ contaminants tested
2 above guidelines
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Cottage City, MD
19+ contaminants tested
2 above guidelines
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Darnestown, MD
19+ contaminants tested
2 above guidelines
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Derwood, MD
19+ contaminants tested
2 above guidelines
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East Riverdale, MD
19+ contaminants tested
2 above guidelines
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Edmonston, MD
19+ contaminants tested
2 above guidelines
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Fairland, MD
19+ contaminants tested
2 above guidelines
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Fairmount Heights, MD
19+ contaminants tested
2 above guidelines
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Forest Glen, MD
19+ contaminants tested
2 above guidelines
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Forest Heights, MD
19+ contaminants tested
2 above guidelines
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Four Corners, MD
19+ contaminants tested
2 above guidelines
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Friendship Heights Village, MD
19+ contaminants tested
2 above guidelines
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Gaithersburg, MD
19+ contaminants tested
2 above guidelines
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Garrett Park, MD
19+ contaminants tested
2 above guidelines
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Glassmanor, MD
19+ contaminants tested
2 above guidelines
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Glen Echo, MD
19+ contaminants tested
2 above guidelines
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Glenarden, MD
19+ contaminants tested
2 above guidelines
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Glenmont, MD
19+ contaminants tested
2 above guidelines
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Greenbelt, MD
19+ contaminants tested
2 above guidelines
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Hillandale, MD
19+ contaminants tested
2 above guidelines
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Hillcrest Heights, MD
19+ contaminants tested
2 above guidelines
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Hyattsville, MD
19+ contaminants tested
2 above guidelines
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Kemp Mill, MD
19+ contaminants tested
2 above guidelines
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Kensington, MD
19+ contaminants tested
2 above guidelines
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Konterra, MD
19+ contaminants tested
2 above guidelines
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Landover, MD
19+ contaminants tested
2 above guidelines
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Landover Hills, MD
19+ contaminants tested
2 above guidelines
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Langley Park, MD
19+ contaminants tested
2 above guidelines
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Lanham, MD
19+ contaminants tested
2 above guidelines
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Layhill, MD
19+ contaminants tested
2 above guidelines
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Leisure World, MD
19+ contaminants tested
2 above guidelines
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Marlow Heights, MD
19+ contaminants tested
2 above guidelines
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Martin's Additions, MD
19+ contaminants tested
2 above guidelines
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Maryland Park, MD
19+ contaminants tested
2 above guidelines
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Mount Rainier, MD
19+ contaminants tested
2 above guidelines
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National Harbor, MD
19+ contaminants tested
2 above guidelines
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New Carrollton, MD
19+ contaminants tested
2 above guidelines
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North Bethesda, MD
19+ contaminants tested
2 above guidelines
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North Brentwood, MD
19+ contaminants tested
2 above guidelines
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North Chevy Chase, MD
19+ contaminants tested
2 above guidelines
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North Kensington, MD
19+ contaminants tested
2 above guidelines
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North Potomac, MD
19+ contaminants tested
2 above guidelines
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Olney, MD
19+ contaminants tested
2 above guidelines
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Peppermill Village, MD
19+ contaminants tested
2 above guidelines
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Potomac, MD
19+ contaminants tested
2 above guidelines
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Redland, MD
19+ contaminants tested
2 above guidelines
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Riverdale Park, MD
19+ contaminants tested
2 above guidelines
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Rockville, MD
19+ contaminants tested
2 above guidelines
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Seabrook, MD
19+ contaminants tested
2 above guidelines
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Seat Pleasant, MD
19+ contaminants tested
2 above guidelines
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Silver Hill, MD
19+ contaminants tested
2 above guidelines
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Silver Spring, MD
19+ contaminants tested
2 above guidelines
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Somerset, MD
19+ contaminants tested
2 above guidelines
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South Kensington, MD
19+ contaminants tested
2 above guidelines
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South Laurel, MD
19+ contaminants tested
2 above guidelines
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Spencerville, MD
19+ contaminants tested
2 above guidelines
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Springdale, MD
19+ contaminants tested
2 above guidelines
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Suitland, MD
19+ contaminants tested
2 above guidelines
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Summerfield, MD
19+ contaminants tested
2 above guidelines
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Takoma Park, MD
19+ contaminants tested
2 above guidelines
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Travilah, MD
19+ contaminants tested
2 above guidelines
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University Park, MD
19+ contaminants tested
2 above guidelines
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Walker Mill, MD
19+ contaminants tested
2 above guidelines
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Washington Grove, MD
19+ contaminants tested
2 above guidelines
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Wheaton, MD
19+ contaminants tested
2 above guidelines
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White Oak, MD
19+ contaminants tested
2 above guidelines
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Woodlawn, MD
19+ contaminants tested
2 above guidelines
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Arcola, VA
19+ contaminants tested
2 above guidelines
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Arlington, VA
16+ contaminants tested
3 above guidelines
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Ashburn, VA
167+ contaminants tested
2 above guidelines
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Belmont, VA
19+ contaminants tested
2 above guidelines
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Brambleton, VA
19+ contaminants tested
2 above guidelines
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Broadlands, VA
124+ contaminants tested
2 above guidelines
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Bull Run, VA
18+ contaminants tested
2 above guidelines
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Cascades, VA
19+ contaminants tested
2 above guidelines
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Chantilly, VA
19+ contaminants tested
2 above guidelines
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Countryside, VA
19+ contaminants tested
2 above guidelines
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Difficult Run, VA
19+ contaminants tested
2 above guidelines
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Dranesville, VA
19+ contaminants tested
2 above guidelines
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Dulles Town Center, VA
19+ contaminants tested
2 above guidelines
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Dunn Loring, VA
19+ contaminants tested
2 above guidelines
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Floris, VA
19+ contaminants tested
2 above guidelines
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Franklin Farm, VA
19+ contaminants tested
2 above guidelines
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Great Falls, VA
19+ contaminants tested
2 above guidelines
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Great Falls Crossing, VA
19+ contaminants tested
2 above guidelines
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Herndon, VA
15+ contaminants tested
3 above guidelines
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Hutchison, VA
19+ contaminants tested
2 above guidelines
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Idylwood, VA
19+ contaminants tested
2 above guidelines
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Lansdowne, VA
19+ contaminants tested
2 above guidelines
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Loudoun Valley Estates, VA
19+ contaminants tested
2 above guidelines
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Lowes Island, VA
19+ contaminants tested
2 above guidelines
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McLean, VA
19+ contaminants tested
2 above guidelines
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McNair, VA
19+ contaminants tested
2 above guidelines
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Moorefield, VA
19+ contaminants tested
2 above guidelines
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Oak Grove, VA
19+ contaminants tested
2 above guidelines
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Oakton, VA
19+ contaminants tested
2 above guidelines
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One Loudoun, VA
19+ contaminants tested
2 above guidelines
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Pimmit Hills, VA
19+ contaminants tested
2 above guidelines
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Reston, VA
19+ contaminants tested
2 above guidelines
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South Riding, VA
19+ contaminants tested
2 above guidelines
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Sterling, VA
19+ contaminants tested
2 above guidelines
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Stone Ridge, VA
19+ contaminants tested
2 above guidelines
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Sugarland Run, VA
19+ contaminants tested
2 above guidelines
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Tysons, VA
19+ contaminants tested
2 above guidelines
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University Center, VA
19+ contaminants tested
2 above guidelines
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Vienna, VA
19+ contaminants tested
2 above guidelines
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Wolf Trap, VA
19+ contaminants tested
2 above guidelines
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D.C. WATER AND SEWER AUTHORITY Contact & Information
Contact
Mailing Address
Water Sources
Surface water purchasedGroundwater under influence of surface waterSurface water
Treatment Methods
conventionalbiological filtrationfiltrationpre-oxidation with chlorinesoftening
Disinfectant Used
chloramines, filtration, hypochlorite
Recommended Water Filters for D.C. WATER AND SEWER AUTHORITY
Based on water quality data from cities served by D.C. WATER AND SEWER AUTHORITY, we recommend NSF-certified filters that can remove contaminants above health guidelines.