Household water treatment in Gaithersburg, Maryland.

Gaithersburg is on WSSC Water's Potomac plant, and WSSC's 2025 report lists free chlorine as the disinfectant in the pipes, with a highest running annual average of 1.05 mg/L against a limit of 4.

Chlorine from the plant to the tap

At the Potomac plant's taps, WSSC recorded residual chlorine averaging 2.0 mg/L in 2025, between 0.9 and 4.8. If a glass from your Gaithersburg kitchen tastes of the pool, that is the place to begin, along with the plant's 154 mg/L average hardness.

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 Gaithersburg 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

Gaithersburg installs are planned around your household's taste concerns and your hard Potomac water, then checked at the kitchen tap.