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City of San Diego Public Utilities Water & Wastewater

The Wastewater system is comprised of two components:

The Metropolitan Sewerage Sub-System treats the wastewater from the City of San Diego and 15 other cities and districts (called Participating Agencies) from a 450 square mile area with a population of over 2.2 million. An average of 180 million gallons of wastewater is treated every day of the year.

The Municipal Wastewater Collection Sub-System is responsible for the collection and conveyance of wastewater from residences and businesses in the City of San Diego, serving a 330 square mile area with a population of 1.2 million people.

Links to detailed information about each of the system's facilities are provided in the menu to the left. The video below explains how the various components of this robust infrastructure work together.

If you have questions or comments, please call our Public Information Line at (858) 292-6484 or email us at water@sandiego.gov.