EcoWater Systems is in a pristine spot. The company manufactures commercial and residential water treatment systems. It sells its products through a network of more than 1,400 dealers, wholesalers, and private-label retailers. Products include water refiners, conditioners, and purifiers, and innovations such as reverse osmosis drinking water systems. Founded in 1925, EcoWater Systems is a member of Berkshire Hathaway's Marmon Group and maintains its autonomous management. In addition to the US, the company operates in Canada, the UK, Europe, and China.

Volunteer Energy Cooperative is voluntarily cooperating with its members to serve their energy needs. The distribution utility serves more than 108,000 customers (who also own the cooperative) in 17 central and eastern Tennessee counties. It operates more than 8,400 miles of power lines. Volunteer Energy purchases its power supply from the Tennessee Valley Authority. The company also sells propane and provides telecommunications (Internet access and long-distance phone) services. In addition, Volunteer Energy offers its customer surge protection and security equipment.

Sempra Energy, together with its subsidiaries, engages in the development of energy infrastructure, operation of utilities, and provision of energy-related products and services worldwide. It operates through two divisions, Sempra Utilities and Sempra Global. The Sempra Utilities division includes San Diego Gas & Electric, a regulated public utility that provides electric generation, transmission, and distribution services to 3.5 million consumers, and natural gas distribution services to 3.2 million consumers; and Southern California Gas, a regulated public utility that provides natural gas distribution, transmission and storage services to a population of 20.7 million. The Sempra Global division comprises of Sempra Commodities, a commodities-marketing business operating under the joint venture, RBS Sempra Commodities, with The Royal Bank of Scotland; Sempra Generation, which develops, owns and operates, or holds interest in electric power plants serving wholesale electricity markets in North America; Sempra Pipelines & Storage that develops, owns, operates, or holds interests in natural gas pipelines and storage facilities in the United States and Mexico, as well as in companies that provide natural gas or electric services in Argentina, Chile, Mexico, and Peru; and Sempra LNG, which develops, owns, and operates receipt terminals for importing liquefied natural gas. Sempra Energy was founded in 1998 and is headquartered in San Diego, California.

Korea Electric Power Corporation, an integrated electric utility company, engages in the generation, transmission, and distribution of electricity; and development of electric power resources in the Republic of Korea. As of December 31, 2009, the company’s transmission system consisted of approximately 30,257 circuit kilometers of lines of 765 kilovolts and others, including high voltage direct current lines, as well as 715 substations with an installed transformer capacity of 247,786 megavolt-amperes; and distribution system included approximately 99,630 megavolt-amperes of transformer capacity and approximately 8 million units of support with a total line length of 420,258 circuit kilometers. It provides electricity primarily to industrial, commercial, residential, educational, and agricultural customers. The company was founded in 1961 and is headquartered in Seoul, South Korea.

Pure water is the aim of water process engineering specialist Enpure. Enpure specializes in treating water, wastewater, and sludge for municipalities and businesses. Its services include process design and project management for water treatment facilities worldwide. There are more than 4,000 plants in 60 countries designed by Enpure. The company licenses the sonix ultrasound sewage treatment technology sold through Sonico, Enpure's joint venture with Atkins. It had been a part of the support services division of water utility AWG until its management (in partnership with Aberdeen Asset Management) bought out the company at the end of 2006. The company changed its name from PURAC at that time.

SEMCO ENERGY is owned by energy investment firm Continental Energy Systems through its Cap Rock Holding unit. Alaska and Michigan have more in common than a cold climate. SEMCO ENERGY serves approximately 410,000 natural gas consumers in both states. The company's main subsidiary is utility SEMCO ENERGY Gas, which distributes gas to about 280,000 customers in 24 Michigan counties. SEMCO's ENSTAR Natural Gas unit distributes gas to about 130,000 customers in and around Anchorage, Alaska. The company's unregulated operations include propane distribution in Michigan and Wisconsin; pipeline and storage facility operation; and information technology outsourcing.

Rutherford Electric Membership Corporation provides power to more than 67,000 members located in 10 counties (Burke, Catawba, Caldwell, Cleveland, Gaston, Lincoln, McDowell, Mitchell, Polk and Rutherford) in the Southwestern Piedmont region of North Carolina. The cooperative (which had a membership of only 394 in 1938, but grew rapidly after WWII) owns and maintains about 7,000 miles of power line. Rutherford Electric has total assets of more than $300 million. The cooperative is a member of the Touchstone Energy Cooperatives network.

United Air Specialists has ESP, and the company knows just when to cause static. The company's industrial air pollution control unit makes electrostatic precipitators (ESP) that electrify airborne particles and remove them from the air. United Air Specialists also makes commercial air-cleaning systems, including kitchen emissions systems. In addition, the company makes electrostatic fluid control and high-precision spraying equipment. The company's products are used in offices, hospitals, bars, schools, and industrial settings. United Air Specialists, founded in 1966, is part of the industrial and environmental filtration business unit of manufacturing group CLARCOR.

Vectren intends to inundate Indiana and Ohio with energy. Through its utility subsidiaries (Indiana Gas Company, Southern Indiana Gas and Electric, and Vectren Energy Delivery of Ohio), the company distributes natural gas to 995,000 business and residential customers in the two states. It also distributes electricity to 141,000 customers and has 1,425 MW of primarily coal-fired generating capacity in Indiana. Vectren's other nonregulated businesses include retail and wholesale energy marketing and management services, coal mining, synthetic fuels production, and utility infrastructure construction.

Alpiq (formerly Aare-Tessin Ltd. for Electricity, or Atel) is the largest supplier of electricity in Switzerland. It generates electricity by means of hydro, nuclear, and coal power, then trades and distributes it through its transmission grid across Switzerland and 28 other European countries. Its main markets include Italy, Germany, France, and countries in Central and Eastern Europe. Alpiq has 5,270 MW of generating capacity. The company also provides energy services including engineering, construction, and maintenance. Atel merged with fellow Swiss energy company EOS Holding in 2009 and became Alpiq. EOS owns 31% of the company; French energy giant EDF, 25%.

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