If you have a sewer overflow, backup or any sewer related questions or issues.

Phone Numbers to Report Sewer Problems:

District Office: (408) 255-2137 
8:00 am – 5:00 pm (Mon-Fri)

After Hours: (408) 299-2507
After 5:00pm (Mon-Fri) and Weekend Emergencies
(County Communications Office)

The District Office is located at:  
County Sanitation District No. 2-3
20863 Stevens Creek Blvd., Suite 100
Cupertino, CA 95014