Wash. Rev. Code § 70A.208.170
(2)
(a) A plan must provide a methodology for reimbursement rates for covered services for covered materials, exclusive of exempt materials. The methodology for reimbursement rates must consider estimated revenue received by service providers from the sale of covered materials based on relevant material indices and incorporate relevant cost information identified by the needs assessment. Reimbursement rates must be annually updated and reflect the net costs for covered services for covered materials from entities receiving services under this chapter, at a minimum. Reimbursement rates must be established equivalent to net costs, using a methodology in an approved plan as follows:
(b) Reimbursement rates must be based on the following, as applicable by the service provided:
(i) The cost to collect covered material for recycling, a proportional share of composting, or reuse adjusted to reflect conditions that affect those costs, varied by region or jurisdiction in which the covered services are provided including, but not limited to:
(iii) The cost to:
(3)
[ 2025 c 316 s 117.]