The goal of water treatment is public health.
The treatment applied varies with the source water quality. The Big Butte Springs source is a very high quality groundwater source that only requires a disinfection process. Although most of the raw water samples collected at the springs source are bacteria free, Coliform bacteria are occasionally found.
The Rogue River is also considered a high quality source but surface waters are subject to a much more extensive treatment process
The Rogue River source receives full conventional treatment at the Robert A. Duff Water Treatment Plant. The plant is located at the Robert L. Lee Water Quality Complex on the Rogue River near Touvelle State Park.