In Person Tours are back on!
But if you can’t make it: Watch Our Virtual Tour Here!
Get a First-Hand Look at How Your Wastewater Treatment Plant Works.
When: 9:30 am – Second Wednesday of February, May, August, November
Where: 2600 Grant Avenue, San Lorenzo, CA 94580
The tours require walking or standing for up to 60 minutes.
This is a working plant. Children under the age of 8 are not allowed.
For your safety: Tour guests should wear a shoe that covers the whole foot such as athletic shoes or walking shoes. Those wearing flip flops or sandals will not be allowed to take the tour.
Dates and registration for upcoming tours:
May 10, 2023
August 9, 2023
November 8, 2023
February 14, 2024
If you are interested in a Special Tour, please call the District at (510) 276-4700 to schedule a date and time. Special Tours are conducted on dates other than those reserved for Quarterly Public Tours and are subject to staff availability.
Special Tour guests are responsible for bringing an adequate number of adult chaperones as outlined below:
Student age Required Student/Adult Ratio
8 -11 years old 1 chaperone per 7 students
12 – 18 years old 1 chaperone per 10 students
Important Numbers
(510) 276-4700 Oro Loma Sanitary District Office 24/7 Emergency Response
(510) 613-8710 Waste Management of Alameda County
(877) STOPWASTE Alameda County Recycling Hotline
(800) 606-6606 Alameda County Household Hazardous Waste
Our Facilities
See what happens inside a Wastewater Treatment Plant and how we protect the San Francisco Bay.
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