Fog Covered Skyline
Seattle City Light DEBRA SMITH, General Manager and CEO
Power Mix
Pay My Bill   
3 City Light Images

How Our Electricity is Generated

Seattle City Light hydroelectric projects on the Skagit and Pend Oreille Rivers provide about half of the power customers need. The remainder comes from a mix of power sources, including long-term contracts with the Bonneville Power Administration (BPA) and other renewable sources. 

The table below provides information on the fuels used to generate the electricity Seattle City Light provided to its customers in 2017. City Light purchases a small portion of power from BPA and from the wholesale market that does not come from renewable resources. These sources are currently part of our reliable and affordable power supply mix and may include natural gas or coal. This information is provided in compliance with fuel disclosure provisions of the Fuel Mix Disclosure section of RCW 19.29A, passed by the Washington State Legislature in 2000.

With City Light and BPA clean power sources and our commitment to conservation and greenhouse gas neutrality, we have been able to provide you carbon neutral power since 2005 with purchases of emissions offsets, and are on track to do so for the foreseeable future. To learn more and engage in our long-term power supply planning process visit us at Power Planning. Another way you can do more to support the Northwest’s clean energy future is by participating in our Green Up Program.

photo of 2018 power mix

contact us

Call Customer Service
(206) 684-3000

Utility Discounts
SAVE 60%
The Utility Discount Program is a great way to lower bills.


  • Contact Seattle City Light

    700 5th Avenue
    Suite 3200
    P.O. Box 34023
    Seattle, WA 98124-4023

    Account & General Questions:

    Contact Us