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What is Ontario’s Electricity Supply Mix?

Ontario has a diverse power supply mix. Its generation fleet continues to evolve, using greener forms of supply to safely and reliably meet the province’s changing electricity needs.

The IESO oversees Ontario’s electricity system. It forecasts daily demand for electricity and operates in real time to ensure an adequate supply is always available. This includes managing the diverse characteristics of Ontario’s generation fleet, making sure power generating units or other sources of supply are ready to ramp up and down production as needed.

Ontario’s Long-Term Energy Plan outlines how the province’s energy needs will be met over the coming years. It is based on the principles of cost effectiveness, reliability, clean energy, community engagement, and an emphasis on conservation and demand management before building new generation.