Beginning January 1, 1993, any wastewater treatment facility or other appropriate waste disposal facility owned or operated by a unit of local government located in a county with a population of less than 3,000,000 may accept, for appropriate treatment or disposal, any septic system sludge generated by any private residence within that unit of local government or within any other unit of local government that is located within the same county and not served by its own wastewater treatment facility. The unit of local government may establish and charge reasonable fees for the acceptance, handling, treatment, and disposal of the sludge to defray any additional capital costs incurred specifically to comply with this Section.
     This Section does not limit any power exercised by a unit of local government under any other law.