Ontario has a diverse supply mix that is in the process of incorporating increasing amounts of renewable forms of energy. 

Here’s an overview of Ontario’s generation fleet:

 

Installed capacity:

There is 34,882 MW of installed generation in Ontario's electricity market. The amount of generation actually available at any one time is dependent on outages and the capacity factor of certain forms of supply.  

 

Ontario’s electricity supply mix currently includes*:

 

Nuclear:

11,446 MW or 33%

 

Gas:

9,549 MW or 27%

 

Coal:

4,484 MW or 13%

 

Hydro:

7,947 MW or 23%

 

Wind:

1,334 MW or 3.8%

 

Other (woodwaste, biogas, etc):

122 MW or 0.3%

 

*Generating resources as of May 24, 2011. Note that these figures do not include generators that operate within local distribution service areas, except for those that participate in the IESO-administered market.