What We Do

At Seattle City Light, we do more than just deliver energy to your homes and businesses – we do it in a way that ensures the energy you receive is carbon-neutral, protects the environment, and is equitable for all of the customers we serve.

Energy the Way You Want It

We've entered a new era of customer choice in energy. Seattle City Light leads the industry in supporting new energy sources for our customers - from customer solar to batteries and storage to electric vehicles.

Learn more about solar energy.

Learn more about electric vehicles and charging.

Power Generation

Seattle City Light's hydroelectric dams supply about half the power our customers need. The other half comes from a mix of power sources.

Graphic showing a mix of the sources of City Light's energy

*Fuels from wholesale market purchases are unspecified because current power market practices don't require the identification of the specific generating source at the time of sale.

**This fuel represents a portion of the power purchased from Bonneville Power Administration.

Learn more about how our electricity is generated. 

Power Distribution

City Light owns and operates 16 major substations and delivers electricity to over 460,000 business and residential customer premises across 131 square miles. Our dedicated crews work around the clock to ensure the safe, reliable, and efficient delivery of power to every home in our service area.

Infographic showing City Light serves a population of 940,000; 419,601 residential customers and 50,779 non-residential customers, and covers 2,330.9 distribution circuit miles

To deliver environmentally responsible, safe, low-cost, and reliable power, we must monitor and measure how effectively it is being distributed through our extensive network of transmission towers, substations, and distribution lines to get to your homes and businesses.

complex generation and distribution network infographic

  1. Power is generated from dam/powerhouse
  2. Substation transformer steps up voltage for transmission
  3. Transmission lines carry electricity long distances
  4. Neighborhood substation transformer steps down voltage
  5. Distribution lines carry electricity to residents
  6. Transformers on poles step down electricity before entering residence
  7. Service line for resident

See what current improvement projects are underway in your neighborhood.

Environmental Leadership

In addition to delivering the cleanest power available, we practice careful resource management and habitat protection.

Learn more about our environmental commitment.

Community Engagement

As a publicly owned utility, City Light—and its employees—are deeply committed to the community. Discover how we engage with our diverse community, from our support for education programs to our participation in community events, employee giving, and volunteerism.

Learn more about our community engagement efforts.

Learn about our commitment to social responsibility.