Whole-home carbon filtration, softening and RO drinking water for Renton homes, installed starting at $3,500. Transparent, all-in pricing quoted before any work starts.
Renton draws most of its water from the ground. Six downtown wells in Liberty and Cedar River Parks pump from the Cedar Valley Aquifer, Springbrook Springs is a small spring in south Renton, and the Maplewood wellfield sits beneath the Maplewood Golf Course. In 2025 the city bought just 1.3 percent of its water from Seattle Public Utilities.
Each source is treated a little differently. Maplewood water is treated to remove manganese, hydrogen sulfide and ammonia before it is chlorinated, and in the West Hill neighborhood the city adds ortho-polyphosphates to protect older cast iron mains. Hardness varies too: the city reports 48 ppm for the downtown wells, 69 ppm for Maplewood and 125 ppm for Springbrook Springs.
Iron and manganese occur naturally in groundwater around Renton. A USGS study of southwestern King County found 15 percent of sampled wells above the federal guideline for iron and 44 percent above the guideline for manganese, and most well water there moderately hard. King County notes that manganese can stain fixtures.
Most of this region's water is soft, so the first thing Renton homeowners tend to notice is taste: chlorine at the kitchen tap, or water that just does not taste the way they want it to. Where a city draws on wells, what comes out of the tap can differ from the mountain supply next door.
Whatever your situation, the next step is the same: we pull the public data on your water, tell you exactly what your home needs, and install it for one all-in price.
Every Renton job is handled locally, start to finish, by a Puget Sound company.