Household water treatment in Frederick, Maryland.

The City of Frederick drew 52.5% of its 2025 water from Linganore Creek, 28.3% from the Monocacy River, 11.1% from Fishing Creek and 8.0% from the Potomac River, and customers may receive any one of them or a mix depending on location.

Four sources, one city

Frederick's 2025 report lists atrazine, a row crop herbicide, at up to 0.73 ppb against a limit of 3, and chlorine at up to 1.22 ppm. Since the source mix depends on where you live, a Frederick assessment starts with your address.

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 Frederick 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

Frederick systems are fitted on the main line and checked at the tap before the job is signed off.