(1) The purpose of Part 8 is to:

(a) Define requirements for water use efficiency programs in water system plans developed under WAC 246-290-100 and small water systems management programs developed under WAC 246-290-105.

(b) Establish a water distribution system leakage standard.

(c) Define process requirements for water use efficiency goal setting.

(d) Establish water use efficiency performance reporting requirements.

(2) The requirements of Part 8 of this chapter apply to public water systems that supply water for municipal water supply purposes.