Westphal is an unincorporated community located in Dartmouth, Nova Scotia and outside of Dartmouth, Nova Scotia. Some of Westphal is considered part of Dartmouth, Nova Scotia and some of it is considered separate from Dartmouth, Nova Scotia. The area is bound by Port Wallace in the north, Waverley Road (Route 318) in the west, Lake Major Road in the east, and Main Street (Trunk 7) in the south. The area also includes the watershed and water filtration plant for the Halifax Regional Water Commission that supplies drinking water for the residents of Dartmouth and surrounding communities east of Halifax Harbour.