(1) To assist the program operators in complying with RCW 69.48.060 (3)(c) and (d), the department will determine and locate each population center consistent with RCW 69.48.060 and this chapter using geographical information systems (GIS) mapping technology, and will publish updated population data to the department's website annually.

(2) The department, in consultation with the local health jurisdiction, will determine underserved areas described in RCW 69.48.060(3) using the following criteria:

(a) Population density of counties;

(b) Estimated number of participating collection sites;

(c) Travel distances and times;

(d) Accessible public facilities such as libraries, town halls, and police and fire departments; and

(e) Geographic features that may inhibit access to collection locations such as mountains and islands.