We are committed to providing the best wastewater and solid waste (refuse and recycling) services to our community. We do this to protect the public health and environment. We seek to provide the best possible service at the lowest possible cost by optimizing operations and the allocation of resources to produce the highest long-term value for our customers.

Open House, May 11 2019!

Don't miss our Open House event on May 11, 2019, 10 a.m – 2 p.m., at our facility located at 2600 Grant Avenue in San Lorenzo!

Join us for a day of fun for the whole family, including hands-on activities, treatment plant tours, student recognition, and complimentary eats and treats. We’ll see you there!

Click here for more info >>

News and Information
Construction is Underway on Nutrient Optimization Project to Improve Water Quality of San Francisco Bay With this innovative wastewater treatment project, Oro Loma becomes one of the first of 37 agencies in the Bay Area to take action in response to growing concerns about nutrient levels in the bay.  Learn more >> 
Wet Weather Equalization Expansion Project. On February 5, 2019, the Board unanimously voted to authorize staff to circulate the addendum to the Initial Study/Mitigated Negative Declaration with the State Clearinghouse and Post Notice of Availability with the Alameda County Clerk for the Oro Loma Wet Weather Expansion Project, Project No. 40-213-10. Learn more >> 
  Reduce Waste, Clean Recyclables to Ensure Highest Value. Recent changes in China’s acceptance of mixed paper and mixed plastics mean fewer places to recycle these materials. While haulers are exploring long-term solutions, it's important to keep recycling, reducing waste and cleaning recyclables. Learn more >>
  Get a First-Hand Look at How Our Water Pollution Control Facility Works! To attend the next regularly scheduled Quarterly Public Tour, please fill out our online form >>
Oro Loma is a Special District, one of many Special Districts in California. What makes Special Districts so special? Click here to find out >>  
Meetings and Events


Oro Loma Sanitary District provides wastewater collection and treatment services, and residential and commercial solid waste and recycling services to its customers.