Solar Energy

Solar Energy Project


Regional San constructed a solar energy array at the EchoWater Resource Recovery Facility. The solar array is one of the largest located at a wastewater treatment plant in the nation. The solar array offers a clean and sustainable energy source with several benefits.

The project is administered through a power purchase agreement with Tesla, who constructed and owns the facility.  Beginning in 2018, all the power generated from the system will be sold to Regional San at a fixed rate for 25-years.

This solar array increases and diversifies our green energy portfolio, provides a clean and sustainable energy source, and brings financial benefits by reducing energy costs. The estimated savings to Regional San over the 25-year period is about $10 million. The solar array also meets environmental requirements for greenhouse gas mitigation as part of the EchoWater Project,

The 4.2 megawatt solar array has a footprint of approximately 21 acres of open space designated for future treatment processes. It will produce approximately eight percent of Regional San’s current energy needs which is enough to power approximately 750 homes annually.

For More Information . . .

For more information about this project, please contact Steve Nebozuk, Senior Civil Engineer, at (916) 876-6118, or via email at

Log in