Water Survey of Canada
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The Water Survey of Canada (WSC) is a scientific branch of Canada's Department of the Environment that is responsible for monitoring the nation's freshwater resources.
The WSC maintains Canada's hydrometric network of data, widely referred to as HYDAT. Once over 2,500 hydrometric gauges were maintained, however currently less than 2000 stations provide active data. that measure and record lake and river water levels and river and stream flows.
Data developed by the WSC is used for water resource management purposes in various policy programs by federal, provincial and municipal governments. This information is also available free to the public by searching their Archived Hydrometric Data. The data also contributes to ongoing efforts to measure local, regional and national impacts from climate change.