See or cause sanitary sewer overflow

Take action  

When you cause or witness raw sewage overflowing into the environment, immediately follow the following steps. Raw sewage contains disease-causing pathogens; including viruses, bacteria, worms, and protozoa that can cause stomach flu, upper respiratory infections, and potentially life-threatening illnesses such as cholera, dysentery, Hepatitis B, and cryptosporidiosis.



Notify the District Immediately

Business Hours
Monday to Friday, 7:30 am to 4:30 pm
Phone: (408) 378-2407, press 2

After Hours Only
Phone: (408) 299-2507


Protect the Storm Drains

Use mats, dikes, berms, anything available to block sewage from entering the storm drain system.


Protect the Public

Monitor, if it is safe to do so, a spill that is entering an area where public contact may occur until the District Maintenance Crew arrives.


Provide Information

Provide information about the SSO such as start time, appearance point, suspected cause, and weather conditions to the District Maintenance Crew.


Direct All Media and Public Relations Requests

Call the District Manager at (408) 378-2407 to forward all media requests.

How do you prevent sanitary sewer overflows

When clearing plugged on-site sewer laterals:

  • Remove root balls, grease blockages and any other debris before they enter the District ROW sewer lateral and sewer main.
  • If you can’t prevent root balls, grease or debris from entering the District ROW sewer lateral or sewer main, call the District at (408) 378-2407, press 8 so the District can work with you to remove the blockage and prevent blockages further downstream in the District sewer system
  • Use plenty of water to flush lines.

When constructing or repairing on-site or ROW sewer laterals:

  • Check your work area. Make sure there is no construction debris left in any sewer line before you backfill.
  • Avoid offset joints, which may make sewer lines vulnerable to root intrusion; and grease or debris accumulation. Properly bed your joints and use District-approved methods to tie into District sewer mains.