Sound Transit

Sound Transit builds and operates regional transit services throughout the urban areas of Pierce, King, and Snohomish Counties in Washington State. Transit services include Link light rail; Sounder commuter rail; ST Express Bus; Tacoma Link light rail; and soon, Bus Rapid Transit. With voter approval, Sound Transit is in the process of planning and building the most ambitious transit expansion in the country. Sound Transit achieved the Platinum level of recognition under the APTA Sustainability Commitment in 2015 and is seeking to achieve carbon-neutral operations by 2050.

Years of Climate Registered Recognition:

2018 Climate Registered

2019 Climate Registered Gold

2020 Climate Registered Gold

2021 Climate Registered Gold


Carbon Footprint Registry



Year Joined


Reports From This Member

Sound Transit

Current Climate Registered Status