(1) The water utility coordinating committee, in recommending, and county legislative authority(ies), in determining the location of external critical water supply service area boundaries shall consider factors including, but not limited to:

(a) Existing land use,

(b) Projected land use and permitted densities as documented in adopted county or city plans, ordinances and/or growth policies for at least ten years into the future,

(c) Other planning activities or boundaries which may affect land use or water system planning,

(d) Physical factors limiting provision of water service,

(e) Existing political boundaries, including boundary agreements in effect and attitudes towards expanding those boundaries,

(f) Future service areas of existing utilities,

(g) Hydraulic factors, including potential pressure zones or elevations,

(h) Economic ability of the public water systems to meet minimum service requirements.

(2) External critical water supply service area boundaries shall not divide any purveyor's existing, contiguous service area. Areas served by a wholesale purveyor may be divided into as many existing service areas as may be justified by geography, engineering or other factors discussed in the preliminary assessment.