The Ontario power plant scandal (also called the gas plants scandal) relates to the decisions by the Liberal government to cancel the construction of two natural gas power plants: one in Mississauga and another in Oakville. Members of the Progressive Conservative Party of Ontario (PC) as well as the Ontario New Democratic Party (NDP) also voted to cancel the power plant. The Mississauga cancellation was made as a late campaign promise in the 2011 general election. From immediately following the election until March 18, 2013, the Liberal government stated that the cost of the cancellations was $230 million — $190 million for the Mississauga plant and $40 million for the Oakville plant. A final report by the Auditor General of Ontario that was released on October 8, 2013, found the total cost of the cancellations was $950 million ($275 million for the Mississauga plant[1] and $675 million for the Oakville plant[2]). This cost included estimates of future costs to the ratepayers.
The scandal contributed to the resignation of Premier Dalton McGuinty and Energy Minister Chris Bentley.