Household water treatment in Potomac, Maryland.

WSSC Water's Potomac Water Filtration Plant, which sits in Potomac itself, draws directly from the Potomac River and processes 120 to 140 million gallons a day, according to WSSC's 2025 report.

The plant down the road

WSSC's 2025 tap analysis found geosmin, a compound behind earthy tastes and smells, at an average of 4.1 ng/L in Potomac plant water. WSSC also watches the river for blue-green algae through summer and autumn, and a visit in Potomac starts with what you notice in your own glass.

The way we work does not change from house to house. We look up the public data on your water, tell you what your home actually needs, and put it in for one all-in price.

What we fit in Potomac homes

• A softener and carbon filter for the whole house, fitted on your main line, as the flagship bundle starting at $2,699 installed.
• Reverse osmosis under the sink for drinking water, and the part of the setup that deals with PFAS.

Done locally

Homes in Potomac get a written plan with the system and the price, and a check at the tap once it is running.