Hydroelectric Water Portal

Ontario Power Generation (OPG) operates 66 hydroelectric stations and 239 dams on 24 river systems.

This site provides information on water levels and flows at OPG hydroelectric facilities. Data is continuously collected using gauges that help safely manage OPG’s stations and dams in watersheds across Ontario.

Please note that data presented on this website is subject to change. Users are to be advised that the site can experience periodic interruptions which may impact the transmission of data to these web pages. This does not impact the safety of OPG Operations or its water management system.
Water Levels and Flows
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About our water data

OPG specialists track water levels and flows with water level gauges at stations and dams across our hydroelectric operations. This information is available to the public and can be accessed throughout this site.

Please access our most recent snow survey information for snow depth and water content. We also maintain a water management web page where you can access additional water-related resources.