For the purpose of this chapter and subsequent regulations, the following definitions shall be used:

(1) "Community water use" means use of water associated with needs of a community including street cleaning, parks, public buildings, public swimming pools, firefighting, and attendant commercial, industrial and irrigational uses.

(2) "Director" means the director of the state of Washington department of ecology or his authorized representative.

(3) "Department" means the department of ecology unless specified otherwise.

(4) "Domestic water use" means use of water associated with human health and welfare requirements, including water used for drinking, bathing, sanitary purposes, cooking, laundering, irrigation of not over one-half acre of lawn or garden per dwelling, and other incidental household uses.

(5) "Commercial and/or industrial use" means use of water associated with commercial and/or industrial requirements such as service, processing, cooling and conveying.

(6) "Public water supply" means any water supply intended or used for human consumption and community uses for more than one single-family residence.

(7) "Public water supply system" means a set of facilities including source, treatment, storage, transmission and distribution facilities whereby water is furnished to any municipality, community, collection, or number of individuals for human consumption and community uses.

(8) "Coordinated water system plan" means a plan adopted by utilities covering one or more public water supply system(s), which identifies present and future needs of participating water systems and sets forth means for meeting those needs in the most efficient manner possible. In areas where more than one water system lie in close proximity, a coordinated water system plan may consist of either of the following:

(a) A compilation of current and compatible water system plans developed by each utility containing the elements of comprehensive plan as set forth in WAC 248-54-280, with the addition of future service area designations, assessment of the feasibility of shared source, transmission, and storage facilities, and other mutual or regional concerns.

(b) An area wide water system plan developed jointly or by a lead agency which adequately addresses all the items mentioned in (a) above.

(9) "Reservation" means an allocation of water for a future beneficial use with the priority established as of the date when the reservation becomes effective.

(10) "Appropriation" means the process of legally acquiring the right to specific amounts of the public water resource for application to beneficial uses pursuant to RCW 90.03.250 through 90.03.340 and 90.44.060.

(11) "Person" means any individual, municipal, public, or private corporation, or other entity however dominated, including a state agency or county who operates a public water supply system or who contemplates such an operation.