Household water treatment in Los Gatos, CA.

Los Gatos is served by San Jose Water, which manages watershed land in the Los Gatos Creek and Saratoga Creek basins for its Santa Cruz Mountains surface supply, alongside groundwater and treated Valley Water.

From the Los Gatos Creek watershed to your tap

San Jose Water's 2025 report lists its mountain surface water at 151 ppm hardness, or 9 grains per gallon, with total dissolved solids of 200 ppm. The groundwater it also delivers averages 288 ppm. The system uses chloramine and chlorine, so a carbon stage matters as much as softening for many Los Gatos homes.

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 Los Gatos 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

In Los Gatos we place the system where your water line enters and plan the drain and bypass around how your home is laid out.