Electricity supply

Puget Sound Energy is the largest energy utility in the state, providing electric power to more than 1.2 million customers. As of December 31, 2022, our electric power resources (company-owned, controlled or under long-term contracts) had a total nameplate capacity of approximately 6,566 megawatts (MW), generating almost 22 million megawatt-hours (MWh) annually.

We’re undergoing the most significant transformation in our history as we strive to meet Washington state’s clean energy laws - some of the most ambitious in the nation - and deliver on our customers’ expectations for energy that is clean as well as safe, reliable and affordable.

Learn more about our clean energy milestones and implementation plans here.

Our diversified mix

To ensure system reliability, we maintain a diverse portfolio of generation resources to serve our customers. This includes renewable and non-emitting generation resources including wind, hydroelectric, solar, and battery storage.

In 2022, hydroelectric and wind power accounted for more than 40% of our power generation. Wind power is an important and increasingly prominent resource for PSE. We own and operate three large wind farms in central and eastern Washington with more expected in the future.

In addition to large, utility-scale resources, we are also pursuing energy produced locally and in partnership with our neighborhoods and communities through programs like Community Solar.

We also generate electricity with our own thermal power plants, natural gas and coal, which help balance the variability of renewable resources. We own and operate several natural-gas-fired power plants in the Puget Sound region. By the end of 2025, in accordance with Washington state law, we will no longer serve our customers with coal-fired electricity.

2022 Electricity Fuel Mix

Diverse resources powering your home and business

The electricity generated for you uses a diverse mix of resources. The PSE fuel mix for electricity delivered to customers in 2022 is detailed in the chart and graph below

Fuel Percentage
Coal 23%
Hydroelectric 27%
Natural Gas 23%
Nuclear <1%
Other* <1%
Solar <1%
Unspecified 10%
Wind 16%
Total 100%

* Biomass, non-biogenic and petroleum.

Source: Published by the Washington Department of Commerce, Dec. 2023, with data reported by PSE in August 2023.