Energy Utility go Results Found: 3 Button group with nested dropdown CenterPoint Energy P.O. Box 4981 Houston TX 77210 (713) 207-2222 Visit Website Reliant, an NRG Company Reliant, an NRG Company 910 Louisiana St. #15004 Houston TX 77002 (713) 537-2328 Visit Website Waste Management Renewable Energy Waste Management Renewable Energy 800 Capitol St., Ste. 3200 Houston TX 77002