For the safety of our customers and employees, all public tours are suspended until further notice.

Get a First-Hand Look at How Your Water Pollution Control Facility Works.

When:   9:30 am – Second Wednesday of February, May, August, November

Where: 2600 Grant Avenue, San Lorenzo

NOTICE: Due to the ongoing COVID-19 crisis, Oro Loma has temporarily suspended the quarterly tours of the wastewater treatment plant. Please check our calendar on the homepage for the status of future tours.

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 for walking shoes. Those wearing flip flops or sandals will not be allowed to take the tour.

To attend the a regularly scheduled Quarterly Public Tour, please select the date below and fill out the form on the following page:

May 13, 2020 >> – The May 13, 2020 tour has been cancelled.

August 12, 2020 >>

November 11, 2020 >>

February 10, 2021 >>

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

Oro Loma Facility Tour Video

Watch Our Virtual Tour!

See what happens inside a Wastewater Treatment Plant and how we protect the San Francisco Bay.

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