Puget Sound Regional Emissions Analysis


Cascadia continuously supports King County’s carbon neutrality efforts through emissions studies, reduction strategies, and public engagement. In 2016, Cascadia led a comprehensive review of King County Department of Natural Resources and Parks’ greenhouse gas (GHG) accounting methods and recommended changes to measuring progress.

In 2018, Cascadia created a greenhouse gas emissions model and wedge analysis for the County in support of its Carbon Neutral Implementation Plan and Puget Sound Clean Air Agency’s four-county GHG inventory. The project included workshops to gather input from County staff, analysis of various GHG reduction pathways, and an evaluation of the co-benefits of potential reduction strategies.

Our Approach

Cascadia is now coordinating with the County and a group of partner agencies on the multifaceted Puget Sound Regional Emissions Analysis to improve data consistency and budget efficiency across the region. This includes:

  •  Updated countywide inventories for King, Pierce, Snohomish, and Kitsap counties
  •  Contribution analyses that attribute proportions of overall emissions to different activity types
  • Government operations inventories
  •  City-specific GHG inventory dashboard and wedge analysis tool to support GHG analyses for all cities within King County. 
  • Consumption-based inventories, which quantify emissions consumed in a region regardless of where they were produced.
  • “Just Transition Indicators” which compare consumption emissions per person and per dollar spent with demographic information (as possible), compares consumption categories of goods and services with other variables (like household size), and maps specific sub-categories of consumption emissions.

Finally, Cascadia is leading stakeholder engagement, graphic design, distilling key takeaways for broad audiences, and documenting the project’s methodology and results.

The Outcome

When completed we will have extremely comprehensive inventories of the region’s GHG emissions, including 2015, 2019, and 2020 GHG geographic, consumption-based, and government operations inventories for King County and a 2019 GHG inventory for all of King County’s cities and the City of Seattle, all available through an dashboard that helps jurisdictions explore the impacts of their proposed emissions-reduction strategies.

These together will put King County, the Puget Sound Region, and the cities within in thoughtful, detailed, and adaptable path to emissions reduction and a carbon neutral future.


Comments are closed.