Power plants and the grid in Ontario
Ontario has 443 power plants with 38.9 GW of capacity, nuclear the largest share at 13.6 GW. The map shows 46 data centers in Ontario.
Capacity by fuel
443 power plants with 38.9 GW of capacity, planned generators left out.
- Nuclear: 13.6 GW from 5 plants (35%)
- Hydro: 8.6 GW from 151 plants (22%)
- Natural gas: 8.4 GW from 17 plants (21%)
- Wind: 5.4 GW from 92 plants (14%)
- Solar: 1.9 GW from 142 plants (5%)
- Biomass: 672 MW from 34 plants (2%)
- Battery storage: 250 MW from 1 plant (1%)
- Pumped storage: 174 MW from 1 plant (under 1%)
Largest plants
- Darlington: Nuclear, 3.7 GW
- Bruce B: Nuclear, 3.4 GW
- Bruce A: Nuclear, 3.2 GW
- Pickering B: Nuclear, 2.2 GW
- Lennox: Natural gas, 2 GW
- Sir Adam Beck 2: Hydro, 1.5 GW
- Pickering A: Nuclear, 1.1 GW
- Robert H Saunders: Hydro, 1 GW
- Greenfield Energy Centre: Natural gas, 1 GW
- Goreway: Natural gas, 875 MW
Largest plants near Toronto
- Pickering B: Nuclear, 2.2 GW, 31 km away
- Pickering A: Nuclear, 1.1 GW, 31 km away
- Goreway: Natural gas, 875 MW, 26 km away
- Halton Hills: Natural gas, 712 MW, 39 km away
- Portlands: Natural gas, 624 MW, 4 km away
Largest plants near Ottawa
- Arnprior Solar: Solar, 23 MW, 45 km away
- Parkway Solar: Solar, 13 MW, 22 km away
- Beckwith Solar: Solar, 13 MW, 45 km away
- Citylights: Solar, 10 MW, 47 km away
- Mississippi Mills: Solar, 10 MW, 44 km away
Largest plants near Hamilton
- Halton Hills: Natural gas, 712 MW, 35 km away
- West Lincoln Niagara Region Wind Farm: Wind, 230 MW, 39 km away
- Grand Renewable Energy Park: Wind, 149 MW, 41 km away
- Decew Falls 2: Hydro, 144 MW, 48 km away
- Summerhaven: Wind, 124 MW, 43 km away
Largest plants near Oshawa
- Darlington: Nuclear, 3.7 GW, 10 km away
- Pickering B: Nuclear, 2.2 GW, 19 km away
- Pickering A: Nuclear, 1.1 GW, 19 km away
- Portlands: Natural gas, 624 MW, 46 km away
- Index Energy Mills Road Corp: Biomass, 18 MW, 14 km away
Largest plants near Kitchener
- Conestogo: Wind, 23 MW, 39 km away
- Gunn's Hill: Wind, 18 MW, 44 km away
- Arthur: Wind, 10 MW, 44 km away
- Ingersoll 1: Solar, 10 MW, 49 km away
- Springwood: Wind, 8 MW, 38 km away
Largest plants near London
- Goshen: Wind, 102 MW, 47 km away
- Bornish: Wind, 73 MW, 40 km away
- Adelaide: Wind, 60 MW, 37 km away
- Adelaide (Suncor): Wind, 40 MW, 40 km away
- Belmont: Solar, 20 MW, 14 km away
Largest plants near Windsor
- Brighton Beach: Natural gas, 541 MW, 6 km away
- Comber East / West: Wind, 166 MW, 41 km away
- West Windsor: Natural gas, 123 MW, 6 km away
- Belle River Wind Farm: Wind, 100 MW, 31 km away
- Gosfield: Wind, 51 MW, 36 km away
Grid operators
- IESO (ISO or system operator)
Data centers
46 data center sites on the map.
- Operators with the most sites: Equinix (6), Sungard (3), Cogent Communications Inc. (2), Cyxtera (2), 3z Canada (1), Allied / Equinix (1), Ascent, LLC (1), Broadline Networks (1), CentriLogic (1), CenturyLink (1)
Sources
Power plants: EIA-860M (US); NRCan NACEI (Canada, Mexico); WRI GPPD (Mexico); OpenStreetMap via Geofabrik (Canada, Mexico gap fill); USGS USWTDB/USPVDB; EPA eGRID; Natural Earth admin-1; HIFLD control areas; location attributes from WorldPop (R2025A), Global Solar Atlas PVOUT, Global Wind Atlas 4, USFS Wildfire Hazard Potential, the USGS National Seismic Hazard Model and the previous publish's lines and substations; water distances from OpenStreetMap via Geofabrik; gas distances and county queue from the previous publish's EIA gas pipelines and LBNL Queued Up requests; nearest city from Natural Earth populated places; cooling degree days from NOAA NCEI nClimDiv county normals; elevation and slope from the Copernicus DEM GLO-30 (ESA, via AWS Open Data); water stress from WRI Aqueduct 4.0; ozone nonattainment from the EPA Green Book; drought from the U.S. Drought Monitor; tribal land from US Census TIGER/Line. License: ODbL (derivative database; EIA content is public domain, NRCan OGL-Canada, WRI GPPD CC BY 4.0; location attributes from WorldPop, Global Solar Atlas, Global Wind Atlas, LBNL Queued Up and WRI Aqueduct CC BY 4.0, USFS, USGS, EIA, NOAA, EPA, US Census and Natural Earth public domain, Copernicus DEM GLO-30 © DLR e.V. and Airbus Defence and Space GmbH, the U.S. Drought Monitor courtesy of NDMC)
Places gazetteer (cities, airports, regions): Natural Earth populated places; OurAirports; Natural Earth admin-1; Wattlas curated places. License: Public domain
Data centers: Epoch AI (CC BY); OpenStreetMap via the public Overpass API (ODbL, © OpenStreetMap contributors); Ringmast4r Global-Data-Center-Map (custom permissive license, attribution required); location attributes from WorldPop (R2025A), Global Solar Atlas PVOUT, Global Wind Atlas 4, USFS Wildfire Hazard Potential, the USGS National Seismic Hazard Model and the previous publish's lines and substations; gas distances and county queue from the previous publish's EIA gas pipelines and LBNL Queued Up requests; nearest city from Natural Earth populated places; generation within 20 km from the previous publish's plants; cooling degree days from NOAA NCEI nClimDiv county normals; elevation and slope from the Copernicus DEM GLO-30 (ESA, via AWS Open Data); water stress from WRI Aqueduct 4.0; ozone nonattainment from the EPA Green Book; drought from the U.S. Drought Monitor; tribal land from US Census TIGER/Line. License: CC BY; ODbL; custom permissive; WRI Aqueduct CC BY 4.0; USFS, USGS, EIA, NOAA, EPA, US Census and Natural Earth public domain; Copernicus DEM GLO-30 © DLR e.V. and Airbus Defence and Space GmbH; the U.S. Drought Monitor courtesy of NDMC
States and provinces (simplified polygons): Natural Earth 10m admin-1. License: Public domain