Household water treatment in Monrovia, Maryland.

In Monrovia, the Landsdale community is on Frederick County's New Design system, which draws on the Potomac River, and the county's 2025 report lists fluoride at a highest result of 0.51 ppm and nitrate at 1.3 ppm; much of the surrounding area relies on private wells.

Landsdale on county water

The county sampled New Design's finished water every quarter in 2025 for 29 PFAS and lithium, and reported PFOS at up to 2.0 ppt. Monrovia homes on a well start with an assessment at the taps instead.

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 Monrovia 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

Monrovia installs begin by checking which supply the house is on.