May 3, 2025
By Conrad Swanson
Seattle Times climate reporter
1 of 2 | Wastewater is treated at King County’s South Treatment Plant in Renton in January. The plant was one of three in the county that tested for “forever chemicals.” (Ellen M. Banner / The Seattle Times) 
2 of 2 | After waste is treated and much of the water is removed, the solid material is collected for further processing at King County’s South Treatment Plant. The material can be turned into fertilizer for the state’s… (Ellen M. Banner / The Seattle Times)