A study by some of Canada's top scientists warns that the country needs to start looking a lot more closely at how it uses its fresh water.
The Council of Canadian Academies report says climate change, shifting agricultural practices and growing urban and industrial use are all putting more pressure on the water supply.
It says better monitoring is needed as climate change makes rainfall and surface water levels harder to predict.
As well, it says governments need to start thinking about water issues when they make long-term land use plans.
It says some areas in the Prairies and southern British Columbia are already pushing the limit of water usage.
