Johnstown Sewage Treatment Plt 241 Asphalt Rd Johnstown, PA 15906 Phone : (814) 535-3805 Business Category Government Offices-City Village & Twp Legislative Bodies Johnstown City Of--sewage, Sewage Treatment Plant Johnstown, PA 15901 Phone : (814) 535-3805 Business Category Government Offices-City Village & Twp Government Offices State & Local Government Offices & Public Schools