The bill, known as the Washington Decarbonization Act, establishes new requirements for large combination utilities in Washington to facilitate the transition to a clean energy economy. It mandates these utilities to file integrated system plans by January 1, 2027, which must demonstrate compliance with emissions reduction targets and include forecasts of customer demand. The legislation emphasizes the need for utilities to decarbonize their systems by prioritizing efficient measures to transition customers away from fossil fuels, investing in necessary energy resources, and ensuring equitable benefits for vulnerable populations. Key provisions include the requirement for utilities to reflect the value of recoverable waste heat in cost-effectiveness analyses, set targets for demand response, and propose significant investments in renewable energy projects.

Additionally, the bill introduces several amendments to existing laws, including the prohibition of rebates for residential gas appliances starting January 1, 2025, and the requirement for utilities to calculate their emissions baseline and projected cumulative emissions. It also mandates that gas companies identify and acquire cost-effective conservation measures and includes provisions for multiyear rate plans that consider environmental health and equity. The commission is granted authority to approve or modify these plans, ensuring transparency and collaboration among utilities. Overall, the legislation aims to enhance accountability and effectiveness in transitioning to cleaner energy sources while addressing the needs of vulnerable populations.

Statutes affected:
Original Bill: 80.28.010
Substitute Bill: 80.28.010
Engrossed Substitute: 80.28.010, 80.28.110
Bill as Passed Legislature: 19.280.030, 80.24.010, 19.405.060, 80.28.130, 80.28.365, 80.28.380, 80.28.425
Session Law: 19.280.030, 80.24.010, 19.405.060, 80.28.130, 80.28.365, 80.28.380, 80.28.425