EXHIBIT 21 SUBSIDIARIES OF CONSOLIDATED NATURAL GAS COMPANY Percent Voting Securities Owned by State of Immediate Name of Company Incorporation Parent Company _____________________________________________ _____________ ______________ CONSOLIDATED NATURAL GAS COMPANY . . . . Delaware Subsidiary companies: Consolidated Natural Gas Service Company, Inc. Delaware 100% CNG Transmission Corporation . . . . . Delaware 100% CNG Iroquois, Inc. . . . . . . . Delaware 100% The East Ohio Gas Company . . . . . . Ohio 100% The Peoples Natural Gas Company . . . . Pennsylvania 100% Virginia Natural Gas, Inc. . . . . . Virginia 100% Hope Gas, Inc. . . . . . . . . . West Virginia 100% West Ohio Gas Company . . . . . . . Ohio 100% The River Gas Company . . . . . . . West Virginia 100% CNG Producing Company . . . . . . . Delaware 100% CNG Pipeline Company . . . . . . . Texas 100% CNG Energy Company . . . . . . . . Delaware 100% CNG Lakewood, Inc. . . . . . . . Delaware 100% CNG Technologies, Inc. . . . . . . Delaware 100% Granite Road CoGen, Inc. . . . . . Texas 100% CNG Gas Services Corporation . . . . . Delaware 100% CNG Storage Service Company . . . . . Delaware 100% Consolidated System LNG Company . . . . Delaware 100% CNG Research Company. . . . . . . . Delaware 100% CNG Coal Company . . . . . . . . . Delaware 100% CNG Financial Services, Inc. . . . . . Delaware 100%