Wash. Rev. Code § 74.13.010
The purpose of this chapter is to safeguard, protect, and contribute to the welfare of the children of the state, through a comprehensive and coordinated program of child welfare services provided by both the department and agencies providing for: Social services and facilities for children who require guidance, care, control, protection, treatment, or rehabilitation; setting of standards for social services and facilities for children; cooperation with public and voluntary agencies, organizations, and citizen groups in the development and coordination of programs and activities in behalf of children; and promotion of community conditions and resources that help parents to discharge their responsibilities for the care, development, and well-being of their children.
RCW 74.13.010