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.

Ergon (named after the Greek word for work) has it covered. Ergo, Ergon operates in six major business segments: asphalt and emulsions; information technology (embedded computing); oil and gas (exploration and production, retail and wholesale sales); real estate; refining and marketing; and transportation and terminaling. In addition to providing a range of petroleum products and services, the company manufactures and markets computer technology services and sells road maintenance systems, including emulsions and special coatings. Ergon also provides truck, rail, and marine transport services and sells residential and commercial real estate properties.

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.

RainSoft (a division of Aquion Water Treatment Products) wants to clear up the water in your home or office. Through its division, the company makes residential and commercial water treatment equipment. Products include whole-house water conditioning systems, drinking water systems, and filters designed to remove particular contaminants that detract from water's taste and odor. RainSoft's products are distributed through a network of about 300 independent dealers in the US and in 24 countries in Asia, Europe, and the Middle East. Clients have included Allstate , Dow Chemical, Ford Motor, Holiday Inn, and Underwriters Laboratories.

Keeping a sharp eye out for the well-being of Iowa's citizens, Central Iowa Power Cooperative provides electricity transmission and generation services to 13 member distribution cooperatives (12 rural electric cooperatives and one municipal cooperative), which in turn serve about 320,000 residential and 7,000 industrial and commercial customers. Central Iowa Power's member distribution cooperatives deliver power to commercial businesses, farmsteads, industrial parks, manufacturers, urban residences, and other customers, in a service area that stretches 300 miles diagonally across the state from Shenandoah in the southwest to the Mississippi River in the east.

Intermountain Power Agency facilities, which began operating in 1987, supply power to the 23 founding municipalities. IPA also sells power through contracts with 13 additional utilities in Utah and California. The IPA is operated by The Los Angeles Department of Water and Power.If you're into mountains (and who isn't?) Intermountain Power Agency (IPA) may well be the key to your access to power. IPA was formed in 1977 by 23 Utah municipal electric utilities to develop and operate the Intermountain Power Project (IPP), a two-unit coal-fired generation facility with a capacity of 1,700 MW, and two high-voltage transmission systems.

Dee Valley Group, operating through its Dee Valley Water unit, supplies water to more than 106,000 households and 8,250 commercial, industrial, and business customers in North East Wales and Cheshire. Dee Valley Water, formed from the combination of Wrexham Water and Chester Waterworks, supplies water to an 831-sq.-km. area. Dee Valley Water exited its nonwater operations in 2002. The company has been investing in its mains and distribution system to preventage leakage, and in 2005 it completed a 15-year water main rehabilitation program. It also commissioned a water treatment works at Pendinas. Dee Valley Group was created in 1994 as the holding company for Wrexham Water. Axa Sun Life owns 35% of the company.

South Carolina Electric & Gas (SCE&G) is a regulated utility with 659,000 electricity and 313,000 natural gas customers in the Palmetto State. The utility, a subsidiary of SCANA, owns 24,500 miles of power distribution lines and more than 15,700 miles of gas transmission mains; it also operates 17 fossil-fueled, nuclear, and hydroelectric power generation facilities with 5,695 MW of capacity. Its service area covers 23,000 sq. mls.SCE&G purchases additional power from other independent generators and utility companies, including SCANA-owned affiliate South Carolina Generating, and it sells wholesale power to other utilities and marketers.

Environmental Waste Controls (EWC) slows down the fill-up of UK landfills. The company leases and sells waste-compactor equipment and provides maintenance services for the compactors. It also collects, transports, and recycles or disposes of waste for its 400-plus public- and private-sector customers, which include manufacturing and retail companies, food processors, hotels (such as Hilton and Radisson Hotels), railway stations, National Health Service Trusts, and local governments. The company was the subject of a management buyout in 2004. EWC was founded in 1993.

Salamander Energy spends its day exploring and producing oil and gas. The company produces about 8,000 barrels of oil equivalent per day; Salamander Energy's proved and probable reserves total about 56 million barrels of oil equivalent. Established in 2005, the company focuses its exploration efforts in regions in Southeast Asia, including Indonesia, Thailand, Laos, and Vietnam. Salamander Energy operates from six offices in the UK and Asia. Salamander Energy plans to expand both organically and through acquisitions.

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