Sanitary sewers remove waste products from your home and send them underground to a treatment plant. Storm drains gather rain and storm runoff and direct them to wetlands and lakes. Ditches and curb line grates are storm drains. Sanitary manholes have solid round covers. The two systems are not connected; storm water entering the sanitary sewer is one possible cause of sewer back ups. The Township maintains the sanitary sewers and the County maintains the storm drains in the road right of ways. Storm drains located elsewhere are usually the responsibility of property owners.