# Bioenergy and the Wastewater Sector

California has roughly 250 wastewater treatment plants (WWTPs) that can be major producers of renewable energy and transportation fuels.  Many of these facilities use the biogas generated from anaerobic digestion of wastewater solids to provide onsite power, using renewable gas instead of fossil fuels to power their operations. California’s WWTPs have the potential to generate significant additional power and to produce ultra-low carbon transportation fuels, lower carbon per mile than electric or fuel cell vehicles. Increasing fuel and energy production from California’s WWTPs will reduce greenhouse gas (GHG) emissions, provide energy and/or revenue to public agencies, produce jobs and economic development, and increase in-state renewable and low-carbon energy supplies.