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David Schaefer Septic, located in Andover, NJ in Sussex County, serves most of northern New Jersey including Sussex County, Warren County, Morris County & Passaic County and parts of Somerset & Hunterdon Counties including the towns of Andover, Branchville, Byram, Franklin, Fredon, Hamburg, Lafayette, Sparta, Sandyston, Stanhope, Wantage, Vernon, Allamuchy, Blairstown, Budd Lake, Hackettstown, Hope, Green Township, Randolph, Chester, Long Valley, Flanders, Mendham, Chatham, Mountain Lakes, E. Hanover, Parsippany, Madison, Florham Park, Ledgewood, Lake Hopatcong, Kenvil, Hopatcong, Morris Plains, Morristown, Cedar Knolls, Mine Hill, Jefferson Twsp, Succasunna, Rockaway, Jefferson, Mount Olive, Pequannock, Wayne, Kinnelon, Pompton Plains, Riverdale, Butler, Boonton, West Milford, Wanaque, Ringwood, Bloomingdale & More