Mt Gretna Sewer Maintenance 101 Chautauqua Dr Mount Gretna, PA 17064 Phone : (717) 964-3270 Business Category Government Offices-City Village & Twp Water & Sewage Companies-Utility Water Supply Legislative Bodies Mt Gretna Borough & Authority--office 101 Chatqa Dr Mount Gretna, PA 17064 Phone : (717) 964-3270 Business Category Government Offices-City Village & Twp Legislative Bodies Government Offices & Public Schools Borough Of Mount Gretna , Phone : (717) 964-3270 Borough Of Mount Gretna Business Category