(1) Applicability. The requirements of this chapter apply to all existing and proposed facilities that are or will be designed, constructed, operated, and maintained in the state of Washington to generate, distribute, and/or use reclaimed water, and to the persons involved in these activities.

(2) Exceptions to applicability.

(a) Nonpotable reuse systems.

(b) Greywater or treated greywater as defined in RCW 90.46.010 and chapter 246-274 WAC.

(c) Agricultural industrial process water as defined in RCW 90.46.010.

(d) Industrial reuse water as defined in RCW 90.46.010.

(e) Land treatment systems of wastewater regulated under chapter 90.48 RCW.

(f) On-site sewage treatment systems, with no reclaimed water generation, under chapters 70.118 and 70.118B RCW and 246-272, 246-272A, and 246-272B WAC.

(g) Reclaimed water facility maintenance. The capture and redirection of wastewater effluent or reclaimed water for facility and internal purposes provided those uses are:

(i) In restricted areas.

(ii) Not subject to public exposure.

(iii) Under the direct control of the generator's or user's authorized maintenance personnel.

(iv) Described within an approved operations and maintenance manual.

(3) Relationship to other applicable regulations. Nothing in this chapter shall be construed to exempt entities from complying with all other applicable local, state, or federal ordinances, codes, or statutes.

(4) Severability. The provisions of this chapter are separate and severable from one another. If any provision is stayed or determined to be invalid, the remaining provisions shall continue in full force and effect.