San Lorenzo, CA, August 7, 2021 – Oro Loma Sanitary District is celebrating 110 years of serving the community and protecting the environment. From its origins serving local industries in San Lorenzo, the post-World War II housing boom, to the 1973 Clean Water Act, changing refuse and recycling practices, the District has responded to the needs of the community and the San Francisco Bay.

““Oro Loma Sanitary District, has made thoughtful and strategic decisions to better serve the community and contribute to the health of the San Francisco Bay, said Board President Rita Duncan.  “We have made great progress over the last decade to improve upon the District’s high standards of quality, system health and reliability.  District employees deserve recognition for their dedication and hard work for supporting the District’s high standards. The District is well positioned to meet the challenges of today and in the future.”

The District was established in 1911 to serve a population that was growing as farms and orchards were being subdivided into individual home sites. It encompassed approximately 800 acres north of Hayward. Over the years, Oro Loma has grown to serve residents and businesses in a 13 square mile area. In addition to sewer collection and wastewater treatment, the District provides refuse collection and recycling services to its customers.

Using Innovation to Tackle Serious Challenges

Oro Loma is an award winning organization with a track record of innovation and efficient operations.  Examples include:

  • Green Energy – for most of the past decade, the District has produced all of its own power from solar and by harvesting biogas from the treatment process to produce its own electricity.
  • A full-scale demonstration of a horizontal levee – a leading alternative to respond to sea level rise. The system uses native grasses and an earthen berm instead of a seawall to buffer against rising bay waters.  In the past five years, over 3,500 visitors have come to view the demonstration.
  • The treatment plant was upgraded in 2006 and again in 2020 to provide nutrient treatment. The District is one of three out of 37 plants to treat nutrients in the San Francisco Bay Area.
  • The District plans to replace 40 miles of pipe over the next ten years, with the goal of improving the health of the collection system despite its age.

Throughout all the growth and innovation, Oro Loma has remained true to its pledge to provide the highest value in wastewater, solid waste, and recycling services to its customers and protect the San Francisco Bay and its communities.


Oro Loma Sanitary District serves communities of Unincorporated Alameda County, including San Lorenzo, Ashland, Cherryland, Fairview, portions of Castro Valley, and designated areas of the Cities of Hayward and San Leandro. Oro Loma’s service area is located about 13 miles south of Oakland and 30 miles north of San Jose on the eastern shore of the San Francisco Bay. Visit our website to learn more.



Jason Warner, General Manager