Research on the hydrology of the Oak Ridges Moraine had begun by 1970, with efforts to understand the significance of the aquifer as a recharge source for Lake Simcoe and Lake Ontario (Haefeli 1970). Only in the last decade, however, has there been a focus on the potential impact of urban development on the moraine, and ultimately on Great Lakes water quality. Much of the research on the moraine has taken place at two centres: the Geological Survey of Canada, and the University of Toronto Groundwater Research Group. Several consulting firms have also made significant contributions, including work for the Oak Ridges Moraine Technical Working Committee, or for private developers.
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