Canada contains how much fresh water?

Answer 1

Of the world's freshwater, about 99.9% is either found in glaciers and icecaps or is underground.
While there may be a minimal fraction of saltwater in a glacier deposited on the face of the glacier by breaking waves or other actions that then freezes, the vast majority of every glacier is precipitation that has accumulated over thousands, even tens of thousands of years. All precipitation is freshwater. For all practical purposes, all the water in a glacier is freshwater.
Now, if your question is how much of a glacier isn't water. Every glacier picks up a significant amount of rock, organic matter, ice worms as it moves and interacts with its environment. ("ice worm" is a geology joke for the bird droppings that get frozen into glaciers, to the uninitiated, it can appear to be some type of worm that lives in the ice). This would be different for each glacier and along the length of the glacier. Glaciers that terminate by melting on land (as opposed to those that terminate by calving icebergs into an ocean) can accumulate moraines that are hundreds of feet thick. However, because the ambient temperature is constantly changing, the terminus of the a land glacier can move dozens of miles back and forth over very short times, making it impossible to determine if a particular deposit was made last summer or 5,000 years ago.

Answer 2

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