 The rapids on the Schuylkill River at East Falls were inundated by the completion of the dam at the Fairmount Water Works.The city is the seat of its own county.The adjacent counties are Montgomery to the northwest; Bucks to the north and northeast; Burlington County, New Jersey, to the east; Camden County, New Jersey, to the southeast; Gloucester County, New Jersey, to the south; and Delaware County to the southwest.