Washington Revised Code Title 80. Public Utilities § 80.28.185. Water companies or wastewater companies within counties--Commission may regulate

The commission may develop and enter into an agreement with a county to carry out the regulatory functions of this chapter with regard to water companies or wastewater companies located within the boundary of that county. The duration of the agreement, the duties to be performed, and the remuneration to be paid by the commission are subject to agreement by the commission and the county.