Orinda Treatment Plant Maintenance Projects

Orinda Filter Plant under construction, June 1935

Orinda Filter Plant under construction, June 1935

EBMUD's Orinda Water Treatment Plant is scheduled to undergo maintenance starting in 2016. 

The Orinda Water Treatment Plant is one of six water treatment plants in our East Bay service area. In service since 1935, the Orinda plant is the workhorse of our local system and operates continually throughout the year. 

Beginning in 2016, the Orinda water treatment plant will undergo necessary maintenance and process upgrades to improve the reliability of its operations.  To facilitate this essential work, the plant must shut down between November 2016 and March 2017. This $22 million project, in planning for almost a decade, is critical to maintain operation of the  plant and to reduce the need for full plant maintenance shutdowns in the future. 

These projects are necessary to replace aging infrastructure, provide required maintenance, increase the treatment plant's reliability and improve drought operations. This work will occur within EBMUD property. About 80 percent of the work is underground. The exterior of the Orinda Water Treatment Plant historical structures will not be altered.


The project includes replacement of the existing filter underdrains and disinfection system, installation of a redundant power building and other appurtenances and interior coating of the Orinda Washwater Tank.

Construction will begin in late April, 2016 and take about 30 months.

Typical work hours will be 8 a.m. to 6 p.m., Monday through Friday and 10 a.m. to 5 p.m. on Saturday. 


Kathryn Horn, Community Affairs Representative
Email: kathryn.horn@ebmud.com
Phone: 510-287-2053
Emergencies or after-hours, call EBMUD at 866-403-2683.