Sunnyvale Water and Sewer
The Sunnyvale Water provides water for about 147,055 residents living in the Sunnyvale area. Established in 1850, the Sunnyvale Water collects water from three different sources of drinking water supply: (1) Hetch Hetchy surface water and treated water from the San Francisco Public Utilities Commission (SFPUC); (2) treated surface water from the Santa Clara Valley Water District (SCVWD); and (3) local groundwater from city-owned, operated and maintained six deep wells.
Sunnyvale City Drinking Water Quality
Consumer Confidence Water Quality Reports
Under the authority of the Safe Drinking Water Act, the EPA requires Sunnyvale Water and Sewer to assess local water quality each year and distribute a Consumer Confidence Water Quality Report.
The information in this report includes the source of your water, whether your water meets EPA standards, detailed tables of detected contaminants, detailed descriptions of those contaminants, possible reasons why they're present, and potential health effects (if any).
Read the Consumer Confidence Report for Sunnyvale City main water system here:
Contact Sunnyvale Water and Sewer Customer Service
Have a Question, Issue or Comment?
Main Customer Service
408-730-7400 (Mon–Fri, 8:00 AM–5:00 PM)
No email provided
Emergency (24 hours - broken water main or pipeline, etc.)
Pay Your Sunnyvale Water Bill
Already have an account?
If you already have an account, you just need to login to the Sunnyvale Water site. Sunnyvale Water accepts credit cards, debit, and direct deposit. Click here to login.
Want to create a new account?
You can create a new account on the Sunnyvale Water website. Once you create the account, you can setup payment with credit, debit, or direct deposit. Click here to create an account.
Want to pay without an account?
You can make a one-time payment without creating an account. You will need to have your credit or debit card in order to make the one time payment. Click here to make a one time payment.
How to Start Water Service
Starting Your Service
When you move to a new home in Sunnyvale City, you'll most likely already have running water, but you'll still need to set up water service with the Sunnyvale Water. Luckily, has made it pretty simple with the following online form. Starting service generally takes just two business days.
Stopping Your Service
When you move out of a home in Sunnyvale City, you'll need to stop your water service with the Sunnyvale Water, so you don't keep getting billed. Simply fill out the following online form. Stopping service normally takes just two business days.