Stillwater WWTF - Redding, California Wastewater Treatment Plant

Stillwater WWTF is a municipal wastewater treatment facility located in Redding, California, serving a population of about 26,900. The plant is situated in Shasta County, an inland region of Northern California, and plays a key role in managing local wastewater for the community. As a US-based facility, Stillwater WWTF operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the California State Water Resources Control Board. For a plant serving a medium-sized agglomeration, secondary treatment is typically required, with potential additional nutrient removal if discharging to sensitive waters. The treated effluent from Stillwater WWTF is discharged into the Sacramento River watershed, which flows south through the Central Valley and ultimately into the Sacramento-San Joaquin Delta and San Francisco Bay. This downstream water body supports diverse aquatic life and is a critical resource for California's water supply and ecosystem.

The plant discharges into the Sacramento River basin, part of the larger San Francisco Bay-Delta system. This watershed supports salmon and steelhead trout populations and provides habitat for numerous bird species. The downstream environment is ecologically sensitive, with water quality considerations including nutrient loading and temperature impacts on aquatic life.