(1) Each purveyor within the boundaries of a critical water supply service area shall develop a water system plan for the purveyor's future service area if such a plan has not already been developed: PROVIDED, That nonmunicipally owned public water systems are exempt from the planning requirements of this chapter, except for the establishment of service area boundaries if they have no plans for water service beyond their existing service area: PROVIDED FURTHER, That if the county legislative authority permits a change in development that will increase the demand for water service of such a system beyond the existing system's ability to provide minimum water service, the purveyor shall develop a water system plan in accordance with this section. The establishment of future service area boundaries shall be in accordance with RCW
70A.100.070.
(2) After the boundaries of a critical water supply service area have been established pursuant to RCW
70A.100.040, the committee established in RCW
70A.100.040 shall participate in the development of a coordinated water system plan for the designated area. Such a plan shall incorporate all water system plans developed pursuant to subsection (1) of this section. The plan shall provide for maximum integration and coordination of public water system facilities consistent with the protection and enhancement of the public health and well-being. Decisions of the committee shall be by majority vote of those present at meetings of the committee.
(3) Those portions of a critical water supply service area not yet served by a public water system shall have a coordinated water system plan developed by existing purveyors based upon permitted densities in county plans, ordinances, and/or growth policies for a minimum of five years beyond the date of establishment of the boundaries of the critical water supply service area.
(4) To insure that the plan incorporates the proper designs to protect public health, the secretary shall adopt regulations pursuant to chapter
34.05 RCW concerning the scope and content of coordinated water system plans, and shall ensure, as minimum requirements, that such plans:
(a) Are reviewed by the appropriate local governmental agency to insure that the plan is not inconsistent with the land use plans, shoreline master programs, and/or developmental policies of the general purpose local government or governments whose jurisdiction the water system plan affects.
(b) Recognize all water resource plans, water quality plans, and water pollution control plans which have been adopted by units of local, regional, and state government.
(c) Incorporate the fire protection standards developed pursuant to RCW
70A.100.080.
(d) Identify the future service area boundaries of the public water system or systems included in the plan within the critical water supply service area.
(e) Identify feasible emergency inter-ties between adjacent purveyors.
(f) Include satellite system management requirements consistent with RCW
70A.100.130.
(g) Include policies and procedures that generally address failing water systems for which counties may become responsible under RCW
43.70.195.
(5) If a "water general plan" for a critical water supply service area or portion thereof has been prepared pursuant to chapter
36.94 RCW and such a plan meets the requirements of subsections (1) and (4) of this section, such a plan shall constitute the coordinated water system plan for the applicable geographical area.
(6) The committee established in RCW
70A.100.040 may develop and utilize a mechanism for addressing disputes that arise in the development of the coordinated water system plan.
(7) Prior to the submission of a coordinated water system plan to the secretary for approval pursuant to RCW
70A.100.060, the legislative authorities of the counties in which the critical water supply service area is located shall hold a public hearing thereon and shall determine the plan's consistency with subsection (4) of this section. If within sixty days of receipt of the plan, the legislative authorities find any segment of a proposed service area of a purveyor's plan or any segment of the coordinated water system plan to be inconsistent with any current land use plans, shoreline master programs, and/or developmental policies of the general purpose local government or governments whose jurisdiction the water system plan affects, the secretary shall not approve that portion of the plan until the inconsistency is resolved between the local government and the purveyor. If no comments have been received from the legislative authorities within sixty days of receipt of the plan, the secretary may consider the plan for approval.
(8) Any county legislative authority may adopt an abbreviated plan for the provision of water supplies within its boundaries that includes provisions for service area boundaries, minimum design criteria, and review process. The elements of the abbreviated plan shall conform to the criteria established by the department under subsection (4) of this section and shall otherwise be consistent with other adopted land use and resource plans. The county legislative authority may, in lieu of the committee required under RCW
70A.100.040, and the procedures authorized in this section, utilize an advisory committee that is representative of the water utilities and local governments within its jurisdiction to assist in the preparation of the abbreviated plan, which may be adopted by resolution and submitted to the secretary for approval. Purveyors within the boundaries covered by the abbreviated plan need not develop a water system plan, except to the extent required by the secretary or state board of health under other authority. Any abbreviated plan adopted by a county legislative authority pursuant to this subsection shall be subject to the same provisions contained in RCW
70A.100.060 for coordinated water system plans that are approved by the secretary.