BETA PREVIEW: UK Grid: Live+ is in testing. See data sources →
UK Grid: Live+ Canada: Ontario's electricity grid, live via IESO

Canada: the live status of Ontario's electricity grid

Canada doesn't run one national grid - each province operates its own system, several synchronised with the US Eastern or Western Interconnections rather than with each other. This page covers Ontario only, run by the IESO (Independent Electricity System Operator), which publishes a fully public, keyless real-time feed - the only Canadian jurisdiction found to do so during research for this page. Demand and generation mix below are live from IESO. Wholesale price, emissions and interchange/transfers aren't available from this source and are shown as not available rather than a placeholder. See data sources for the full picture.

Connecting to live data…

Data as of
Loading live data…
Wholesale price
Not available

Not published via IESO's public reports

Emissions
Not available

Not published via IESO's public reports

Demand
-GW
Generation
-GW
Transfers
Not available

Not wired up on this install yet

Loading live data from IESO…

Generation mix

Loading live data…

SourceGW%

    Ontario's mix is unusual for North America - dominated by nuclear and hydro, with very little fossil generation left.

    Generation by source, ranked highest to lowest.

    Generation mix over the last 24 hours

      Renewable (hydro, wind, solar) and non-renewable (nuclear, gas, biofuel, other), from IESO's per-fuel-type feed.

      History

      Choose a time range to see demand and generation over time. Wholesale price, emissions and transfers aren't available from IESO's public reports, so those panels show "not available" rather than a chart. Because this install only started polling IESO recently, longer ranges may show little or no data yet - see data sources.

      About Ontario's grid, and why this page isn't "Canada"

      Canada has no single national grid or national system operator - power is a provincial responsibility, and each province runs its own system. Several are synchronised with neighbouring US interconnections (Ontario and most of the rest of Canada sit inside the Eastern Interconnection, British Columbia inside the Western Interconnection, and Quebec runs its own separate asynchronous grid tied to the rest of North America only via HVDC links) rather than with each other directly.

      Ontario's system operator, the IESO, publishes a genuinely public, keyless, machine-readable set of real-time and historical reports - covering demand and generation by fuel type - which is what powers this page. Ontario's own generation mix is unusual for North America: nuclear typically supplies the largest single share, complemented by hydro, with a small and shrinking role for gas and very little coal (phased out entirely in 2014) or oil.

      Other provinces - Quebec (heavily hydro), British Columbia (heavily hydro), Alberta (gas and a fast-growing wind/solar fleet, with its own competitive market and a free-but-registered API) and the rest - aren't covered here. Adding them would need separate research and ingestion work per operator, since Canada has no equivalent of the EIA or ENTSO-E to query once for the whole country.

      Context

      • Nuclear share of generationTypically around half - dipped in the low 50s during 2022-2024 refurbishment outages
      • Hydro share of generation~23-25% in a typical year
      • Last coal-fired power station closedApril 2014 (Thunder Bay) - first jurisdiction in North America to eliminate coal power entirely
      • All-time peak demand record27,005MW - 1 August 2006, during a summer heatwave

      Approximate nuclear share of Ontario generation by year - dipped during a multi-year Bruce/Darlington refurbishment programme, recovering as units return to service.

      Figures are approximate, gathered from public IESO year-end reporting rather than a long-run historical feed. Last checked: 23 August 2026.

      Data sources for Canada

      The Elexon Insights Solution, NESO Data Portal and Carbon Intensity API that power the Great Britain pages are GB-specific and don't cover Canada at all - and unlike GB, Ireland or the EU, there's no single Canadian source to point a live feed at either. This page uses one source only: IESO's public report repository, which powers demand, generation and the generation mix (including the 24-hour stack and this page's History section) above and below - Ontario only.

      Why it's limited, and why this page deliberately sticks to that one source:

      • Ontario only, not all of Canada. IESO is Ontario's system operator; it has no visibility into, and doesn't publish data for, any other province. See the "About" section above for why the rest of Canada isn't covered yet.
      • No wholesale price shown. IESO does publish Ontario market prices, but in a more complex shape (multiple pricing mechanisms following recent market reforms) that this install doesn't currently parse - rather than show a number that might be measuring the wrong thing, the price stat and its History panel are marked "not available".
      • No emissions figure. IESO doesn't publish a carbon-intensity number in its public reports, so emissions is also marked "not available" rather than estimated.
      • No transfers figure yet. IESO does publish an interchange/intertie schedule report, but it isn't wired into this install yet - marked "not available" rather than guessed at.
      • History depth builds up over time. IESO's "most recent" report aliases only ever contain a rolling recent window, not a deep archive - unlike GB's decade-plus of stored history, Canada's History section here only covers however long this install has actually been polling IESO for.

      See the sitewide data sources page for how this compares to the other pages.