Household water treatment in Darnestown, Maryland.

Darnestown homes on WSSC Water receive Potomac River water, and WSSC's 2025 report lists unregulated PFHxA in it averaging 3.7 ng/L and PFPeA 3.8 ng/L; homes beyond WSSC's lines rely on private wells.

Public water or a well

For Darnestown homes on WSSC, the most recent lead and copper sampling found copper at a 90th percentile of 0.12 mg/L, with none of 69 sites over the action level. If your home is on a well, there is no utility report to read, so the assessment begins with what you are seeing in the house.

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 Darnestown 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

Darnestown installs start by confirming whether the house is on WSSC or a private well.