The IESO (Independent Electricity System Operator) operates Ontario's power grid and wholesale electricity market, a nuclear- and hydro-heavy system serving Canada's most populous province. GridVigil tracks hourly Ontario demand, generation by fuel type, and the intertie flows with Quebec, New York, Michigan, Minnesota, and Manitoba, all from the IESO's own public reports. Ontario is a single province, so Canada as a whole is not colored on GridVigil's map.
As of Aug 24, 2026, real grid metrics for Ontario are shown below. GridVigil's Power Pressure Score is not yet calculated for this region.
GridVigil Power Pressure Score is not yet calculated for Ontario: the U.S. scoring thresholds aren't a defensible fit without region-specific calibration, so raw metrics are shown here instead. Why.
Data last updated:
Generation mix
Fuel type
Capacity
Share
Nuclear
7,732 MW
39%
Gas
5,964 MW
30%
Hydro
4,856 MW
24%
Wind
1,038 MW
5%
Other
421 MW
2%
Solar
36 MW
0%
Biofuel
28 MW
0%
Interconnector flows (imports / exports)
Manitoba: -74.6 MW (export)
Michigan: +1,030.8 MW (import)
Minnesota: +6.8 MW (import)
New York: +348.9 MW (import)
Quebec: +1,253.4 MW (import)
Positive = flowing into Ontario; negative = flowing out.
Historical comparison
Ontario demand is currently 13.6 GW, 3.7% below this time yesterday (14.1 GW).
Ontario demand is currently 10.5% below its 7-day average for this time of day (15.2 GW).
Ontario's peak today is 16.8 GW, below its highest peak of 22.8 GW over the past 13 days.