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District Manager-Engineer,
Benjamin T. Porter, P.E. 
Click here to contact

Office Phone:
(408) 253-7071

Office Hours:
Monday - Friday,

After Hours & Weekends
Emergency Response Call:

(408) 299-2507


Our physical office is closed.

To get in touch with us please call (408) 253-7071 or send an email to:

We know you’re working hard to keep yourselves healthy during COVID19 Shelter-in-Place. Help us keep our sewers healthy as well. Remember to never flush wipes, paper towels, or tissues because they clog our pump stations and the pipes! The District has 17 pump stations and it has become a major maintenance issue, resulting in significant cost increases (see photo to the right).

With the shortage of toilet paper, wipes are being used. Just remember:  Save your pipes!  No matter what the label says, don’t flush them – instead trash them.

Below are links to recent CA media coverage related to COVID-19 and impacts on the wastewater system:

If you have any questions, please contact us at (408) 477-7300.

In response to the rapidly evolving COVID-19 situation and under guidance from local, state and federal authorities, we will be closing our physical office, beginning Tues, March 17, 2020 while continuing to provide limited service to our customers.

We will continue to provide 24/7 service for sewer backups and other sewer related emergencies. If you have a sewer backup please call County Communications at (408) 299-2507 and an inspector will respond within 2 hours.

Our office staff will continue to work from home as much as possible and provide service to our customers via phone and email. Please visit our Contact page to reach us via email or phone.

Over-the-counter permits and all construction related inspections are on hold until further notice.

The safety of our customers, employees and families remains our number one priority. We thank you for your patience and cooperation during this uneasy time.

Cupertino Sanitary District
Cupertino Sanitary District

Cupertino Sanitary District provides sewer service to over 23,000 customers within the communities of Cupertino, portions of Saratoga, Sunnyvale, Los Altos and unincorporated areas within Santa Clara County.

Our Mission

To protect the public health and environment. To provide for safe and cost-efficient collection of sewage waste within Cupertino Sanitary District. To provide for effective conveyance to the Treatment Plant.

Sewer backing up? CALL US FIRST . . .  

(408) 253-7071 M-F, 8am-5pm

or (408) 299-2507, After Hours

We will respond to sewer backup calls 24/7.
Do NOT send an email for sewer backups.

Click here for more on sewer backups.

Notice of Public Hearing:


On May 19, 2021, at 7:00 PM, the Cupertino Sanitary District Board is scheduled to conduct a teleconference public hearing on proposed increases to the Sewer Service and Use Charges in accordance with Executive Order N-33-20 (Call-In Number: 1-866-899-4679 Access Code:  251566821). These charges are paid by residential, commercial, institutional, and industrial users of the sanitary sewer system. 

At the hearing, staff will be proposing a rate increase for Single Family Residential and some commercial users in accordance with the rate schedule in this link.

Protests must be in writing and received by the District prior to the close of the public hearing on May 19, 2021.  Indicate the Assessor’s Parcel Number(s) of the property(ies) you own that are subject to the proposed rate adjustment.  Submit written protest to the District Clerk in the form of a letter, fax, or e-mail at:

20863 Stevens Creek Blvd. Suite 100, Cupertino, CA 95014

Fax (408) 253-5173, email

For questions, call: (408) 253-7071

See the following links for more information:

Before You Dig...
Before You Dig...

Go online or call
two working days before you dig.


or Dial 811 or 1-800-227-2600


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    Contact us

    20863 Stevens Creek Boulevard, Suite 100
    Cupertino, CA 95014
    Phone: (408) 253-7071
    Fax: (408) 253-5173

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