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"In many parts of Canada water systems are vulnerable, as ageing storm and sanitary sewer infrastructure, stemming from a "significant long-term deficit in infrastructure improvement" often results in infrastructure incapacities to handle the "new, higher levels of precipitation."[8]"
"In the Don River Watershed in the Lake Ontario basin, urbanization of 15 percent of in 1950 is predicted to become 91 percent in 2021.[75] Average annual flows in the Don River have increased by 0.44% per year since the early 1960s.[76]"


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