OMOfficial Mark adopted and used by the Independent Electricity System Operator. Used under licence. Enersource Hydro Mississauga, Horizon Utilities Corp., Brampton Hydro and PowerStream Inc. are now Alectra Utilities Corp. The Hydro One logo is owned by Hydro One Networks Inc. "Partners in Powerful Communities" is an Official Mark owned by Hydro One Inc. ®A registered trademark of Toronto Hydro Corporation used under licence. "Toronto Hydro" means Toronto Hydro-Electric System Limited.