Wastewater System Map
Where Does it Flow?
The system map below shows San Francisco's major wastewater facilities. It also can help you determine which treatment plant treats your wastewater. Look at the dotted red line that divides the City. If your home or business is located to the left of the line, then your wastewater flows west by gravity towards the Oceanside Treatment Plant. If it is to the right, then it flows east by gravity towards the Southeast Treatment Plant.
Click on each item to learn more about the way the wastewater system works in San Francisco.
