Storm, Sewer, and Wastewater
Did you know we're currently upgrading our wastewater treatment plant? Find out more about the work we're doing at https://cleanwaterprogramsanmateo.org/wwtp/.
Managing Our Underground Collection System
Maintaining the underground collection system is a 24-hour operation. The underground system, managed by our Public Works Department, is vital to the health and well-being of our community. To ensure that the wastewater treatment plant and underground collection system operates properly and provides reliable service to the community, we meet regulatory requirements, maintain infrastructure, and align with the environmental and sustainability goals of San Mateo.
Find out more about the Clean Water Program at https://cleanwaterprogramsanmateo.org/.
Responsibilities of Property OwnersOur private sewer lateral ordinance states that the property owner is responsible to repair, replace, and maintain their sewer lateral. In the ordinance details, a private sewer lateral is defined as the pipe running from the building to the city sewer main, including the wye connection at the city main. This DOES include any portion of the pipe that crosses into the public right-of-way and is buried underneath the sidewalk and street.
In 2020, City Council approved an amended Private Sewer Lateral Ordinance, visit the Private Sewer Lateral Ordinance webpage.
Sewer Lateral Program
San Mateo residents and property owners are responsible for maintaining their sewer lateral, which is the line that connects a home or structure to the City's sewer system. If you are experiencing problems with your sewer lateral or if it needs replacement, our Sewer Lateral Cost Sharing Program may help.
Residents can also help protect the environment and our sanitary sewer and storm drain systems by reporting illegal dumping, pollution or nuisance conditions, and other maintenance concerns to the Public Works Department by calling (650) 522-7300 or use our online complaint form.
If you have questions about the environmental quality of our underground collection system or to learn more about how you can help, please call our Environmental Compliance Office at (650) 522-7342.
- Clean Water Program
- Marina Lagoon Management
- Mercury and the Water Quality Connection
- Sewer Lateral Cost Sharing Program
- Sewer Service Charge Information
- Storm Drainage System
- Water Pollution Prevention
- Sewer System Management Plan