sentences:  The riding, which was first contested in the 2007 provincial election, consists of the municipalities of Guelph/Eramosa, Puslinch, Erin, Centre Wellington and Halton Hills.47.5% of the riding came from Halton, 25.2% came from Waterloo—Wellington, 16.3% came from Guelph—Wellington and 11% came from Dufferin—Peel—Wellington—Grey.Although it is counted as a Midwestern Ontario riding, the Halton Hills portion is part of the Greater Toronto Area.