Washington Revised Code Title 35. Cities and Towns § 35.92.430. Environmental mitigation activities

(1) A city or town authorized to acquire and operate utilities for the purpose of furnishing the city or town and its inhabitants and other persons with water, with electricity for lighting and other purposes, or with service from sewerage, stormwater, surface water, or solid waste handling facilities, may develop and make publicly available a plan to reduce its greenhouse gases emissions or achieve no-net emissions from all sources of greenhouse gases that the utility owns, leases, uses, contracts for, or otherwise controls.

(2) A city or town authorized to acquire and operate utilities for the purpose of furnishing the city or town and its inhabitants and other persons with water, with electricity for lighting and other purposes, or with service from sewerage, stormwater, surface water, or solid waste handling facilities, may, as part of its utility operation, mitigate the environmental impacts, such as greenhouse gases emissions, of its operation, including any power purchases. The mitigation may include, but is not limited to, those greenhouse gases mitigation mechanisms recognized by independent, qualified organizations with proven experience in emissions mitigation activities. Mitigation mechanisms may include the purchase, trade, and banking of greenhouse gases offsets or credits. If a state greenhouse gases registry is established, a utility that has purchased, traded, or banked greenhouse gases mitigation mechanisms under this section shall receive credit in the registry.