This interactive map illustrates the many components that make up Ontario’s energy system. Click on each layer to reveal information on Ontario’s 21 energy planning regions, local distribution company service areas, transmission, generation, and the oil and gas pipeline network. Each layer of the map can be displayed independently with some combined for comparison.
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Nuclear | ![]() |
Hydroelectric |
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Gas-fired | ![]() |
Wind-powered |
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Biofuel | ![]() |
Solar |
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500 kV |
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230 kV |
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115 kV |
Note: For areas where two transmission lines run parallel, the higher voltage line is shown. |
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Canadian Mainline |
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Great Lakes Gas |
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Union Gas |