16 Pa. Stat. § 5177
It shall be unlawful for any municipality or person to keep, maintain or conduct a garbage disposal plant without a plant license from the county commissioners as in this act provided. It shall also be unlawful for any municipality or person to construct a garbage disposal plant within the county until the plans and specifications therefor have been submitted to and approved by the county commissioners and a plant license has been issued by the county commissioners authorizing such municipality or persons to keep, maintain or conduct such garbage disposal plant upon its construction: Provided, however, That the provisions of this section shall not apply to a garbage disposal plant constructed by or for the use of a municipality within its boundaries.
16 P.S. § 5177