Effective July 1, 1992, each city or county as a part of its solid waste management plan shall have in effect a program to reduce on a per capita basis the amount of municipal solid waste, as evidenced by the solid waste received at disposal facilities, which are not exempt from subsection (c) of Code Section 12-8-21, within its jurisdiction consistent with the goal established in subsection (c) of Code Section 12-8-21.