25 Pa. Code § 72.31
A person installing a permit-exempt system shall indemnify and hold harmless the Commonwealth, the local agency, the sewage enforcement officer serving the municipality in which the system is located and the municipality where the system is located from and against damages to property or injuries to any persons and other losses, damages, expenses, claims, demands, suits and actions by any party against the Commonwealth, the local agency, sewage enforcement officer and the municipality in connection with the malfunctioning of the onlot sewage system installed under the permit exemption provisions of this chapter. It is the sole responsibility of the property owner who installed or contracted for the installation of a sewage system under the permit exemption provisions of this chapter or the property owner who accepted responsibility for the system upon purchase of the property under the disclosure provisions of § 72.32(a) (relating to sales contracts) to correct or have corrected any system malfunction which contaminates surface water or groundwater or discharges to the surface of the ground. Malfunctions of systems installed under this chapter which contaminate groundwater or surface water or discharge to the surface of the ground shall constitute a nuisance and shall be abatable in a manner provided by law.
25 Pa. Code § 72.31
The provisions of this §72.31 amended under sections 7.2 and 9 of the Pennsylvania Sewage Facilities Act (35 P. S. §§ 750.7b and 750.9); The Clean Streams Act (35 P. S. §§ 691.1-691.1001); and section 1920-A of The Administrative Code of 1929 (71 P. S. § 510-20).