It is important for customers to understand the roles of government bodies, agencies and organizations and their involvement in generation connections. Clicking on the name of the agency/organization in the table below will take you to the website of that agency/organization.

Organization Roles and Responsibilities
Ministry of Energy
  • Establishes public policy and develops legislation and regulations relating to electricity
  • Legislative responsibility for the Independent Electricity System Operator (IESO), the Ontario Energy Board (OEB), and other agencies
  • Significant legislation: Electricity Act, 1998 and Regulations, Ontario Energy Board Act, 1998, Electricity Restructuring Act, 2004, Green Energy and Green Economy Act, 2009
Independent Electricity System Operator (IESO) The Independent Electricity System Operator (IESO) operates and manages Ontario's electricity system at the generation and transmission level. It does not design, build or own the system; it co-ordinates how the system interacts and performs. The IESO monitors the performance, reliability and future adequacy of the system to provide electricity to Ontarians. The IESO creates electricity market rules, matches generation with load 24/7, establishes the Hourly Ontario Energy Price (HOEP) and settles wholesale electricity payments.
Ontario Energy Board (OEB)
  • Regulates the electricity sector in Ontario. This includes generators, transmitters (greater than 50 kV) and distributors (less than 50 kV)
  • Issues licenses for generators, transmitters, distributors, and retailers
  • Responsible for protecting the interests of consumers with respect to prices, reliability, and adequacy and quality of electricity service
  • Approves the rates charged by transmitters and distributors
  • Creates codes and regulations for certain aspects of how transmitters and distributors conduct their business
  • Responsible for promoting economic efficiency of generation, transmission and distribution.
Ontario Power Generation (OPG) Ontario Power Generation (OPG) owns and operates most of Ontario's generating capacity. The Province of Ontario owns OPG.​
Hydro One
  • The province's largest transmission company
  • Owns the provincial transmission grid
  • Distributes electricity outside of the major urban centres
  • Supplies Local Distribution Companies (LDCs), like Horizon Utilities, from transformer stations and distribution stations
  • Owned by the Province of Ontario.
Electrical Safety Authority (ESA) ​The Electrical Safety Authority (ESA) is responsible for ensuring that electrical equipment is installed safely and meets required standards in accordance with the Ontario Electrical Safety Code (OESC). Click here for the ESA's guidelines for micro generation.
Measurement Canada (MC) Measurement Canada (MC) is a federal agency of Industry Canada with the mandate of regulating meters and metering throughout the country. MC administers the Electricity and Gas Inspection Act. R.S. 1985, C.E-4.​
Ontario Ministry of Environment (MOE) The Ontario Ministry of Environment (MOE) sets environmental standards for electricity projects in Ontario and ensures that generators, distributors and transmitters follow rules and standards when constructing and operating facilities.​