Hydro One Inc. delivers electricity safely, reliably and responsibly to homes and businesses across the province of Ontario. We are wholly owned by the Government of Ontario, and are proud of our key role in the provincial infrastructure.
http://www.hydroone.com

The Independent Electricity System Operator (IESO) works at the heart of Ontario's power system, connecting all participants - generators that produce electricity, transmitters that send it across the province, retailers that buy and sell it, industries and businesses that use it in large quantities and local distribution companies that deliver it to people's homes.
http://www.ieso.ca

The Ontario Energy Board (OEB) has been given responsibility for implementing and overseeing this framework, ensuring that market participants comply with their regulatory obligations. In doing so, we balance various objectives, including protecting consumers’ interests and ensuring the viability of Ontario’s natural gas and electricity industries.
http://www.oeb.gov.on.ca

The Ministry of Energy and Infrastructure’s responsibility is to ensure that Ontario’s electricity system functions at the highest level of reliability and productivity. By encouraging the development of new ideas and technologies we are helping to make Ontario a world leader in the global energy market.
http://www.energy.gov.on.ca

The Ontario Ministry of Natural Resources contributes to the environmental, social and economic well-being of the people of Ontario, meeting not only today's needs, but also ensuring these resources are available for future generations.
http://www.mnr.gov.on.ca

Ontario’s Ministry of the Environment (MOE) is responsible for protecting clean and safe air, land and water to ensure healthy communities, ecological protection and sustainable development for present and future generations of Ontarians
http://www.ene.gov.on.ca

The Ontario Power Authority contributes to the development of a reliable and sustainable electricity system. We will encourage and facilitate conservation and adequate electricity supply from diverse resources.
http://www.powerauthority.on.ca

The Conservation Bureau of the Ontario Power Authority was established in 2005 by the Ontario government who recognized that conservation has to play an increasingly important role in assuring an adequate supply of electricity for the Ontario public, businesses and institutions.
http://www.conservationbureau.on.ca