West Texas Gas is 100%-owned by CEO J. L. Davis. With a deep understanding the utility of natural gas, natural gas utility West Texas Gas distributes more than 25 billion cu. ft. of natural gas, propane, and other petroleum products to more than 25,000 residential, commercial, agricultural, and governmental customers in Texas and Oklahoma Panhandle region. West Texas Gas, Inc., the fourth-largest investor-owned public utility in Texas, also operates retail gasoline stations and convenience stores and has gas gathering, production, transmission, and marketing operations.

San Diego Gas & Electric (SDG&E) digs doling out energy in sandy Southern California. The company is a regulated utility that serves 1.4 million electricity customers and more than 840,000 natural gas customers in San Diego County and a portion of southern Orange County. The electric utility segment owns about 22,200 miles of power distribution lines, which serve about 25 communities; its 1,870 miles of transmission lines are managed by the California Independent System Operator. SDG&E also has limited power generation operations (it owns or contracts more than 5,500 MW of generating capacity). The gas utility operates almost 170 miles of transmission pipelines and about 8,420 miles of distribution mains.

Catalytic Combustion Corporation clears the air -- literally and alliteratively. The company makes systems, processes, and products to help customers eliminate volatile organic compounds (VOCs) and other pollutants in order to meet air-quality standards. Catalytic Combustion's catalysts -- substances that accelerate the rate of chemical reactions -- are used in a host of industries and products, ranging from appliances to graphic arts to nuclear power plants. The company makes catalysts from materials such as ceramics, metal foil, and wire mesh. Catalytic Combustion was founded in 1950.

Reliance Infrastructure, formerly Reliance Energy, transmits and distributes electricity across India. The company's service territory covers an area exceeding a 124,300 square kilometers and includes the major cities of Delhi and Mumbai. Reliance Infrastructure operates power plants that generate more than 940 MW of capacity. Part of the Anil Dhirubhai Ambani Group, Reliance Infrastructure delivers more than 36 billion units of electricity to more than 30 million consumers. The company is also a major player in India's heavy construction market, and is engaged in constructing roads and airports, and developing urban infrastructure. It also has interests in real estate and retail hospitality.

NSTAR is looking to outshine its rivals through the efficiency of its regulated electric and natural gas sales, distribution, and transmission operations. The utility holding company transmits and distributes electricity to almost 1.2 million homes and businesses through NSTAR Electric and serves some 300,000 natural gas customers in Massachusetts through NSTAR Gas. The company also markets wholesale electricity, and operates liquefied natural gas (LNG) processing and storage facilities. Its NSTAR Communications unit owns about 240 miles of fiber optic network. In 2010 the company agreed to be acquired by Northeast Utilities for about $4.2 billion.

Buckeye Power was established by Ohio's rural electric co-ops to produce and transmit electric power for member systems throughout the state. Buckeye Power, which owns two of the three generating units in the at Cardinal Generating Station, contracts with other Ohio electric companies to use their transmission systems to transmit power to its member electric distribution cooperatives.It has cost a few bucks to generate power, but the effort has been well worth it for Buckeye Power, an electricity generation and transmission cooperative that provides electricity to 24 distribution companies in Ohio and one in Michigan. Together they serve more than 390,000 homes and businesses in 77 of Ohio's 88 counties

Pinnacle West Capital is at the peak of the energy pyramid in Arizona. It is the holding company for the state's largest electric utility, Arizona Public Service (APS), which transmits and distributes electricity to 1.1 million residential, commercial, and industrial customers throughout most of the state. The utility also has more than 6,280 MW of generating capacity. Through APS and other subsidiaries, Pinnacle West markets wholesale and retail power in Arizona and the western US. The company also develops and manages real estate and invests in energy ventures.

LifeSource Water Systems uses is customer satisfaction. The water treatment product company manufactures and distributes water filtration equipment to residential, commercial, and industrial customers. LifeSource Water Systems' system uses an activated carbon filter rather than salts or chemicals. Its Beotron branded systems have earned the Gold Seal certification issued by the Water Quality Association. The company operates primarily in California; it also maintains outlets in Idaho and Nevada. LifeSource Water Systems was founded in 1984.

Constellation Energy Group, Inc., through its subsidiaries, supplies energy products and services in North America. The company operates in three segments: Merchant Energy, Regulated Electric, and Regulated Gas. The Merchant Energy segment owns, operates, and maintains fossil, nuclear, and renewable generating facilities, and holds interests in nuclear generating facilities, qualifying facilities, and power projects. It also provides operation and maintenance services, including testing and start-up, to owners of electric generating facilities. In addition, this segment offers products and services to meet the energy requirements of wholesale and retail customers, including distribution utilities, cooperatives, aggregators, and commercial, industrial, and governmental customers. As of December 31, 2009, it had a total generation capacity of 7,118 megawatts. The Regulated Electric segment purchases, transmits, distributes, and sells electricity in central Maryland. It maintained approximately 240 substations, 1,300 circuit miles of transmission lines, and 24,500 circuit miles of distribution lines. The Regulated Gas segment purchases, transports, and sells natural gas in central Maryland. Constellation Energy Group also designs, constructs, and operates renewable energy, heating, cooling, and cogeneration facilities; offers energy performance contracting and energy efficiency engineering services; provides home improvements, service electric and gas appliances, service heating, air conditioning, plumbing, electrical, and indoor air quality systems, as well as offers natural gas marketing to residential customers in central Maryland; and develops and deploys new nuclear plants in North America through its joint venture. The company was founded in 1906 and is based in Baltimore, Maryland.

Duke Energy Indiana (formerly PSI Energy) brings a spark to the Hoosier state. One of Indiana's largest utilities, Duke Energy subsidiary Duke Energy Indiana transmits and distributes electricity to 69 of the state's 92 counties (approximately 780,000 customers). The utility also owns power plants (more than 6,730 MW of primarily fossil-fueled capacity), which are operated by its parent's merchant energy division. Duke Energy Indiana's service area covers about 22,000 sq. miles with an estimated population of 2.4 million. The company operates about 31,000 miles of distribution lines and a 5,400-mile transmission system. In 2010 Duke Energy Indiana appointed company veteran Doug Esamann as president.

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