(a) Other remedies.--The collection of a penalty under this chapter shall not be construed as estopping the Commonwealth, a municipality or an authorized agency from proceeding in courts of law or equity to abate public nuisances under existing law.
(b) Remedies additional and cumulative.--It is declared to be the purpose of this section to provide additional and cumulative remedies to protect the public interest in the water resources of this Commonwealth.
(c) Pending suits.--This chapter does not apply to suits instituted prior to its effective date.