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

Office Phone:
(408) 253-7071

Business Hours:
Monday - Friday,

In-Person Counter Service:
Monday - Friday,
10am-3pm, or by appointment

After Hours & Weekends
Emergency Response Call:

(408) 299-2507


Cupertino Sanitary District office will be closed for the Thanksgiving holiday from
Thursday, November 23rd - Friday, November 24th.
We will return to normal operating hours on Monday, November 27th. For all sewer emergencies during this time, please call our 24 hour dispatch service: (408) 299-2507.


Our office is now open to the public. 

In-person permit counter service hours are M-F, 10am-3pm. 

For in-person service outside of the daily hours, an appointment is required. 

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

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

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) 253-7071.

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.

Current Projects


Notice of Public Hearing on Report on Rates and Collection on Tax Roll FY 2023-2023:

On June 21, 2023, at 7:00 PM, the Cupertino Sanitary District Board is scheduled to conduct a public hearing on Report on Sewer Service Rate and Charges, and Collection of Sewer Rates and Charges on Tax Roll. These charges are paid by residential, commercial, institutional, and industrial users of the sanitary sewer system. 

The hearing will take place at the District office located at 20863 Stevens Creek Blvd. Suite 100, Cupertino CA 95014 and via teleconference (Call-In Number: 1-866-899-4679 Access Code: 251566821).

Contact the District office at (408) 253-7071 of you have any questions.


On May 17, 2023, at 7:00 PM, the Cupertino Sanitary District Board conducted a public hearing on proposed increases to the Sewer Service and Use Charges. These charges are paid by residential, commercial, institutional, and industrial users of the sanitary sewer system. 

The hearing took place at the District office located at 20863 Stevens Creek Blvd. Suite 100, Cupertino CA 95014 and via teleconference.

At the hearing, staff proposed a residential rate increase not to exceed 5% for FY 2023-2024.  Non-residential customer rates will increase proportionately. The Board approved the increase and new rates take effect on July 1, 2023.

Click Here to see the full approved Ordinance.

Click Here to see the new fee schedule.


At the regular Board meeting held March 1, 2023, the Cupertino Sanitary District Board approved Ordinance No. 130. This ordinance amends the Cupertino Sanitary District Operations code pertaining to requirements for providing and maintaining cleanouts and sewer laterals.

Existing section 4101 "Cleanouts" of the Cupertino Sanitary District Operations Code is deleted and replaced by a new section 4101 which requires cleanouts in the following situations:

  1. All new developments
  1. Existing property fronting a public street and requiring a building permit when any new plumbing fixtures are added or the total cost of improvements exceed $50,000 or the upper lateral (from the building to the property line) is being replaced or repaired.
  2. Any property where a sewer blockage results from a defect in the existing cleanout
  1. Any property in which a District inspection shows "defect 4" pursuant to the National Association of Sewer Service Companies Pipe Assessment Certification Program or the cleanout's size is less than 4 inches in diameter.

Excepted from the foregoing requirements are installations of cleanouts at the option of the property owner as described.

Cleanouts must be installed by the property owner at no cost to the district. When cleanouts are connected to the existing lower lateral (from street right-of-way to the sewer main) the district will reimburse the owner at the rate of $400 per foot for any portion of the lateral more than 3 feet from the cleanouts if there is no sidewalk and curb and gutter replacement. If there is a sidewalk and curb and gutter replacement the rate is $500 per foot.

Click here to see the full text of Ordinance No. 130.

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

Go online or call
two working days before you dig.


or Dial 811 or 1-800-227-2600


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.

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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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