(11) Subject to subsection (7) of this section, to fix rates and charges for water, sewer, reclaimed water, and drain service supplied and to charge property owners seeking to connect to the district's systems, as a condition to granting the right to so connect, in addition to the cost of the connection, such reasonable connection charge as the board of commissioners shall determine to be proper in order that those property owners shall bear their equitable share of the cost of the system. For the purposes of calculating a connection charge, the board of commissioners shall determine the pro rata share of the cost of existing facilities and facilities planned for construction within the next ten years and contained in an adopted comprehensive plan and other costs borne by the district which are directly attributable to the improvements required by property owners seeking to connect to the system. The cost of existing facilities shall not include those portions of the system which have been donated or which have been paid for by grants. The connection charge may include interest charges applied from the date of construction of the system until the connection, or for a period not to exceed ten years, whichever is shorter, at a rate commensurate with the rate of interest applicable to the district at the time of construction or major rehabilitation of the system, or at the time of installation of the lines to which the property owner is seeking to connect. In lieu of requiring the installation of permanent local facilities not planned for construction by the district, a district may permit connection to the water and/or sewer systems through temporary facilities installed at the property owner's expense, provided the property owner pays a connection charge consistent with the provisions of this chapter and agrees, in the future, to connect to permanent facilities when they are installed; or a district may permit connection to the water and/or sewer systems through temporary facilities and collect from property owners so connecting a proportionate share of the estimated cost of future local facilities needed to serve the property, as determined by the district. The amount collected, including interest at a rate commensurate with the rate of interest applicable to the district at the time of construction of the temporary facilities, shall be held for contribution to the construction of the permanent local facilities by other developers or the district. The amount collected shall be deemed full satisfaction of the proportionate share of the actual cost of construction of the permanent local facilities. If the permanent local facilities are not constructed within fifteen years of the date of payment, the amount collected, including any accrued interest, shall be returned to the property owner, according to the records of the county auditor on the date of return. If the amount collected is returned to the property owner, and permanent local facilities capable of serving the property are constructed thereafter, the property owner at the time of construction of such permanent local facilities shall pay a proportionate share of the cost of such permanent local facilities, in addition to reasonable connection charges and other charges authorized by this section. A district may permit payment of the cost of connection and the reasonable connection charge to be paid with interest in installments over a period not exceeding fifteen years. The county treasurer may charge and collect a fee of three dollars for each year for the treasurer's services. Those fees shall be a charge to be included as part of each annual installment, and shall be credited to the county current expense fund by the county treasurer. Revenues from connection charges excluding permit fees are to be considered payments in aid of construction as defined by department of revenue rule. Rates or charges for on-site inspection and maintenance services may not be imposed under this chapter on the development, construction, or reconstruction of property. Before adopting on-site inspection and maintenance utility services, or incorporating residences into an on-site inspection and maintenance or sewer utility under this chapter, notification must be provided, prior to the applicable public hearing, to all residences within the proposed service area that have on-site systems permitted by the local health officer. The notice must clearly state that the residence is within the proposed service area and must provide information on estimated rates or charges that may be imposed for the service.
A water-sewer district shall not provide on-site sewage system inspection, pumping services, or other maintenance or repair services under this section using water-sewer district employees unless the on-site system is connected by a publicly owned collection system to the water-sewer district's sewerage system, and the on-site system represents the first step in the sewage disposal process.
Except as otherwise provided in RCW 90.03.525, any public entity and public property, including the state of Washington and state property, shall be subject to rates and charges for sewer, water, stormwater control, drainage, and street lighting facilities to the same extent private persons and private property are subject to those rates and charges that are imposed by districts. In setting those rates and charges, consideration may be made of in-kind services, such as stream improvements or donation of property;