October 20, 2008

Ontario’s Peak Electricity Demand Falls By 6% in 2008

Ontario’s peak demand for electricity fell by 6% during the summer of 2008 compared to the summer of 2007.  Summer is the peak period for electricity use in Ontario, with air conditioners fueling demand.

In 2008, electricity demand in the province reached a peak of 24,195 megawatts (MW) on June 9th.  The 2007 peak of 25,737 MW occurred on June 26th.  This 1,542 MW drop in demand is equivalent to 40% of the total capacity of the gigantic Nanticoke coal-fired power plant.

Ontario’s summer peak electricity demand is now at its lowest level since 2004 when it peaked at 23,976 MW.  The drop in demand was due to a combination of a cool summer, the downturn in our economy and energy conservation. According to Hydro One, for example, approximately one-third of the drop in its demand was due to cooler weather.

The Ontario Clean Air Alliance will be presenting Peak Buster Awards to seven southern Ontario electric utilities and the Northern York Region municipalities that beat the provincial average by achieving demand reductions of 6.12% to 25.02% at the time of the province-wide system peak.

Peak Buster Award Winners


Demand on June 9, 2008
at 3 PM (MW)

Demand on June 26, 2007
at 4 PM (MW)

Change (%)

Wasaga Distribution Inc.




Hydro One




Orangeville Hydro




Barrie Hydro Distribution Inc.




Northern York Region*




Newmarket Hydro




Horizon Utilities Corporation




Grimsby Power Inc.




*For electric power planning purposes the Ontario Power Authority has defined Northern York Region to be the communities served by Newmarket’s Armitage Transformer Station, namely, Newmarket, Aurora, Whitchurch-Stouffville, East Gwillimbury, King Township and Bradford-West Gwillimbury.

Please pass this message on to your friends.

Thank you.

Jessica Fracassi, Communications & Membership Director
Ontario Clean Air Alliance
402-625 Church St, Toronto M4Y 2G1
Phone: 416-926-1907 ext. 245
Fax: 416-926-1601
Email: jessica@cleanairalliance.org
Website: www.cleanairalliance.org
Website: www.OntariosGreenFuture.ca