Sammamish Plateau Water & Sewer

The Sammamish Plateau Water and Sewer District provides water for about 65,543 residents living in the area of Sammamish, Washington. Established in 1948, the Sammamish Plateau Water and Sewer District is currently obtaining its supply from a combination of sources: about 80% groundwater pumped from wells located in two separate, non-connected distribution zones: the Plateau Zone and Cascade View Zone, which pump from the Plateau Aquifer and the Lower Issaquah Valley Aquifer (LIVA); and approximately 20% of your water supply comes from surface water sources operated by Seattle Public Utilities (SPU), which uses water from the Tolt Watershed and Cedar River Watershed.
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Sammamish Drinking Water Quality

Consumer Confidence Water Quality Reports

Under the authority of the Safe Drinking Water Act, the EPA requires Sammamish Plateau Water & Sewer to assess local water quality each year and distribute a Consumer Confidence Water Quality Report. At WaterZen, we review these reports and make the information available, in a concise, straightforward, and easy-to-understand way.

Contact Sammamish Plateau Water & Sewer Customer Service

Have a Question, Issue or Comment?

Main Customer Service

Physical Address:
1510 228Th Ave Se
Sammamish, 98075

425-392-6256 (Mon–Fri, 8:00 AM–4:30 PM)

Emergency (24 hours - broken water main or pipeline, etc.)

Pay Your Sammamish Plateau Water Bill

Already have an account?

If you already have an account, you just need to login to the Sammamish Plateau Water site. Sammamish Plateau 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 Sammamish Plateau 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 Sammamish City Water Service

Starting Your Service

When you move to a new home in Sammamish, you'll most likely already have running water, but you'll still need to set up water service with the Sammamish Plateau Water. Luckily, Sammamish City has made it pretty simple with the following online form. Starting service generally takes just two business days.

Click here to fill out a Start Service Form.

Stopping Your Service

When you move out of a home in Sammamish, you'll need to stop your water service with the Sammamish Plateau Water, so you don't keep getting billed. Simply fill out the following online form. Stopping service normally takes just two business days.

Click here to fill out a Stop Service Form.

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