WSSC Service Area

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For a company serving 1.8 million customers in both Montgomery and Prince George's counties, you can imagine the area we cover is large. On this map, see if you can spy our:

6 Water Resource Recovery Plants
Damascus, Hyattstown, Parkway, Piscataway, Seneca and Western Branch. All together, they treat 70 million gallons of wastewater each day.

4 Maintenance Depots
Anacostia, Gaithersburg, Lyttonsville, and Temple Hills

3 Reservoirs
Little Seneca, Rocky Gorge, and Triadelphia, which hold a combined total capacity of 14 billion gallons.

2 Water Filtration Plants
Patuxent and Potomac

1 Blue Plains Advanced Wastewater Treatment Plant
Although operated by DC Water, the plant handles up to an additional 169 million gallons per day. This plant treats about 65 percent of WSSC’s wastewater each year.

*WSSC's service area does not include Washington, D.C. and Virginia