Wash. Rev. Code § 19.405.040
(1) It is the policy of the state that all retail sales of electricity to Washington retail electric customers be greenhouse gas neutral by January 1, 2030.
(a) For the four-year compliance period beginning January 1, 2030, and for each multiyear compliance period thereafter through December 31, 2044, an electric utility must demonstrate its compliance with this standard using a combination of nonemitting electric generation and electricity from renewable resources, or alternative compliance options, as provided in this section. To achieve compliance with this standard, an electric utility must:
(b) Through December 31, 2044, an electric utility may satisfy up to twenty percent of its compliance obligation under (a) of this subsection with an alternative compliance option consistent with this section. An alternative compliance option may include any combination of the following:
(ii) Using unbundled renewable energy credits, provided that there is no double counting of any nonpower attributes associated with renewable energy credits within Washington or programs in other jurisdictions, as follows:
(d) Hydroelectric generation used by an electric utility in meeting the standard under (a) of this subsection may not include new diversions, new impoundments, new bypass reaches, or expansion of existing reservoirs constructed after May 7, 2019, unless the diversions, bypass reaches, or reservoir expansions are necessary for the operation of a pumped storage facility that:
(2) Investments in energy transformation projects used to satisfy an alternative compliance option provided under subsection (1)(b) of this section must use criteria developed by the department of ecology, in consultation with the department and the commission. For the purpose of crediting an energy transformation project toward the standard in subsection (1)(a) of this section, the department of ecology must establish a conversion factor of emissions reductions resulting from energy transformation projects to megawatt-hours of electricity from nonemitting electric generation that is consistent with the emission factors for unspecified electricity, or for energy transformation projects in the transportation sector, consistent with default emissions or conversion factors established by other jurisdictions for clean alternative fuels. Emissions reductions from energy transformation projects must be:
(5) Any compliance obligation fulfilled through an investment in an energy transformation project is eligible for use only:
(6)
(a) In meeting the standard under subsection (1) of this section, an electric utility must, consistent with the requirements of RCW 19.285.040, if applicable, pursue all cost-effective, reliable, and feasible conservation and efficiency resources, and demand response. In making new investments, an electric utility must, to the maximum extent feasible:
[ 2019 c 288 s 4.]