Powering Ontario: A Reliable Mix of Energy Sources

Understanding where the electricity powering your household is generated

Ontario is home to one of North America’s cleanest electricity grids, powered by a diverse mix of energy sources that work together to meet the province’s electricity needs. From nuclear and hydroelectric generation to natural gas, wind, solar, and bioenergy, each resource plays a unique role in keeping electricity flowing to homes, businesses, and communities across Ontario. 

Because electricity demand changes throughout the day and across seasons, no single energy source can meet all of Ontario’s needs all the time. Nuclear and hydroelectric facilities provide a stable foundation of electricity, while natural gas and renewable resources help respond to changing demand and system conditions. 

This diversity makes Ontario’s electricity system more reliable, resilient, and adaptable. By drawing on multiple sources of generation, the province can maintain a dependable supply of electricity while supporting a cleaner energy future. 

Want to learn more about where your electricity comes from? Explore Ontario’s electricity supply mix and discover how different energy sources work together to power the province: https://www.miltonhydro.com/getattachment/Stay-Informed/Regulatory/Legislation-and-resources/2025-supply-mix-data-update.pdf.aspx?lang=en-US  

Did you know you can view Ontario’s actual and forecast electricity demand, along with the supply mix that is being used to meet that demand?

Check it out at the IESO Power Data dashboard: https://www.ieso.ca/power-data