State Emissions Reductions Requirements

The State of Washington must limit greenhouse gas (GHG) emissions to achieve the following reductions:

• By 2020, reduce overall GHG emissions in the state to 1990 levels
• By 2030, reduce overall GHG emissions in the state to 45% below 1990 levels; and
• By 2040, reduce overall emissions to 70% below 1990 levels; and,
• By 2050 reduce overall emission to 95% below 1990 levels.

Every other year, the Washington State Departments of Ecology and Commerce must post and maintain on the department’s website and report to the governor and legislature on the total GHG emissions in the state for the most recent two years for which data are available. Beginning in 2027 this reporting will be required annually. For more information, see the Washington State Department of Ecology Responding to Climate Change and Reducing Greenhouse Gas Emissions websites.

(Reference Senate Bill 5036, 2025 and Revised Code of Washington 70A.45.020)