Utilities - Ontario Power Generation (OPG) is an Ontario-based electricity generation company whose principal business is the generation and sale of electricity in Ontario. Our focus is on the efficient production and sale of electricity from our generation assets, while operating in a safe, open and environmentally responsible manner. OPG's generating portfolio has a total capacity of over 21,000 megawatts (MW) making us one of the largest power generators in North America. Our generating assets include: 3 nuclear generating stations; 5 fossil generating stations; 65 hydroelectric generating stations. OPG also owns two other nuclear generating stations which are leased on a long-term basis to Bruce Power L.P.