The Laclede Group, Inc. operates as a public utility holding company. The company’s principal subsidiary, Laclede Gas Company, provides natural gas service to approximately 630,000 residential, commercial, and industrial customers in metropolitan St. Louis and surrounding counties in eastern Missouri. Its primary non-regulated subsidiary, Laclede Energy Resources, Inc., markets natural gas and related services to on-system utility transportation customers and customers outside of its utility’s traditional service area. The Laclede Group company was founded in 1857 and is based in St. Louis, Missouri.

Although South Central Power Company may sound like a power plant in Watts, Los Angeles, it is in fact a member-owned cooperative that provides electricity to consumers and businesses in southern Ohio. An affiliate of the nationwide Touchstone Energy Cooperative network, the electric cooperative provides power to more than 110,000 customers over more than 11,000 miles of power lines. In addition to distributing electricity, South Central Power also provides outdoor lighting, surge suppression products, security systems, water heater switches, and other energy-related services.

Union Gas has a habit of bringing natural gas and energy consumers together. The utility, a subsidiary of midstream maven Spectra Energy transmits and distributes natural gas to more than 1.3 million residential and business customers in more than 400 communities throughout most of the Canadian province of Ontario. It also provides gas transportation and storage services for other utilities and businesses in Canada and the US. Union Gas operates 3,000 miles of transmission pipeline, 37,000 miles of distribution main and service pipeline, and 22 underground storage facilities.

Orival manufactures self-cleaning water filters, automatic water filters, and strainers for industrial and agricultural use as irrigation filters, cooling tower filters, industrial water filters, and HVAC filters. The company has installed units in more than 40 countries. Orival's products are flexible in design so that the company can cater to a wide range of customized orders and local requirements -- form single units, flange-to-flange systems, and complete skid mounted packages, to diverse construction standards, alternate flanges, and voltage standards.

Piedmont Natural Gas Company, Inc., an energy services company, distributes natural gas to residential, commercial, industrial, and power generation customers in portions of North Carolina, South Carolina, and Tennessee. It also operates various energy-related businesses, including unregulated retail natural gas marketing, interstate natural gas storage, and intrastate natural gas transportation. As of October 31, 2009, the company served 952,469 retail customers and 61,000 customers served by municipalities. Piedmont Natural Gas Company, Inc. was founded in 1949 and is headquartered in Charlotte, North Carolina.

North Wind works to keep the air clean, the ground fresh, and the water clear in North America. The environmental consulting firm's services include site assessment, soil and groundwater remediation, geographic information system (GIS) data, hazardous and nonhazardous waste management, and project engineering and construction. North Wind has expanded by buying South Carolina-based Pinnacle Consulting Group, which offers engineering, environmental, and information technology consulting services.

Exelon Corporation company distributes electricity to 5.4 million customers in northern Illinois (including Chicago) and southeastern Pennsylvania (including Philadelphia) through subsidiaries Commonwealth Edison (ComEd) and PECO Energy. PECO also distributes natural gas to 485,000 customers. Subsidiary Exelon Generation holds the company's power plants, whose production capacity is just about 25,000 MW. About two-thirds of Generation's power is nuclear. Exelon Power Team is a top wholesale energy marketer, and Exelon Energy markets retail power and offers other energy-related services.

Ozark Mountains need power and Ozarks Electric Cooperative aims to deliver. The member-owned not-for-profit cooperative serves more than 62,000 customers in about a dozen counties spread across northwest Arkansas and northeast Oklahoma. Its 350 miles of line reach industrial, commercial, residential, and agricultural power users. Ozarks Electric provides its customers with energy audits and information on saving energy as well as energy efficient water heaters and surge protectors. It is a member of Touchstone Energy, a national alliance of electric cooperatives in nearly 40 states. The coop was formed in 1938.

SCS Tracer Environmental traces its financial success to its large portfolio of environmental engineering, consulting, and monitoring services. Among the firm's specialties are ambient air monitoring, counter-terrorism support, environmental advisory services and environmental construction, permitting and compliance, and risk management and safety, and research and development. In addition to private sector clients, the company also works on contracts for the federal government. SCS Tracer's staff includes atmospheric scientists, engineers, and meteorologists. The firm was named Tracer Environmental Sciences & Technologies until being acquired by SCS Engineers in late 2009.

Rayburn Country Electric Cooperative (Rayburn Electric) operates in the old stomping grounds of the legendary Texas politician and former speaker of the US House of Representatives. Rayburn Electric is a power generation and transmission organization that supplies wholesale power to five rural distribution cooperatives operating in 16 counties in north central and northeastern Texas. The five distribution cooperatives (Fannin County Electric Coop, FEC Electric Coop, Grayson-Collin Electric Coop, Lamar County Electric Coop, and Trinity Valley Electric Coop) collectively own the company. In 2010 it acquired a 25% stake in a Texas power plant from Calpine for $215 million.

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