Owned by the City of Toronto, Toronto Hydro provides electric and related services for the metropolitan area and other parts of Ontario. The company's primary subsidiary, Toronto Hydro-Electric System Limited (LDC), provides regulated power transmission and distribution services to 709,000 residential, commercial, and industrial customers. Subsidiary Toronto Hydro Energy Services markets power and provides energy efficiency products and services throughout Ontario. The subsidiary also provides street lighting services across the city of Toronto.