Pampa Energ�a is one of Argentina's largest fully integrated electricity companies. Through subsidiaries or co-controlled companies, it generates more than 7% of the total electricity in Argentina, transmits some 95% of the country's electricity through transmission lines owned and operated by subsidiary Transener, and distributes electricity to more than 2.6 million residential and commercial customers through subsidiary Empresa Distribuidora y Comercializadora Norte (Edenor), the largest electricity distributor in Argentina. Pampa Energ�a maintains fossil fuel, thermal, and hydroelectric generation operations. Its distribution, transmission, and hydroelectric activities are regulated by Argentina's government.

Bangor Hydro-Electric (BHE) has dropped its hydro, but the company still has plenty of electricity. As part of the restructuring of the electric utility industry in the state of Maine, BHE has shed its generating facilities, including its hydroelectric projects, to focus on distribution and transmission. The regulated utility serves 117,000 customers in six counties in southeastern Maine. The company is also a member of the New England Power Pool. Bangor Hydro-Electric is a subsidiary of Canada's Emera, the parent company of electric utility Nova Scotia Power.

Consolidated Water Co. Ltd. and its subsidiaries develop and operate seawater desalination plants and water distribution systems, as well as produce and supply water to customers in the Cayman Islands, the Bahamas, Belize, the British Virgin Islands, and Bermuda. It uses reverse osmosis technology to convert seawater to potable water. The company supplies water to end-users, including residential, commercial, and government customers. As of December 31, 2009, Consolidated Water Co. operated 16 reverse osmosis desalination plants through its subsidiaries and affiliates. It also offers engineering and management services, including designing and constructing desalination plants, and managing and operating desalination plants owned by other companies. The company was founded in 1973 and is based in Grand Cayman, Cayman Islands.

Hokkaido Electric Power Co. (HEPCO) distributes electricity to almost 3.9 million residential, commercial, and industrial customers on the northernmost Japanese island, Hokkaido. The company operates more than 46,760 miles of transmission and distribution lines, and it owns thermal, hydroelectric, and nuclear power plants (including the No. 1 and No. 2 reactors at Tomari Power Station). HEPCO also purchases and markets wholesale energy; other operations include engineering and construction, energy consulting, electrical appliance sales, telecommunications, information technology, and utility-related services. New businesses include medical imaging systems and realty. The company was founded in 1951.

San Antonio Water System provides water and wastewater services to 344,200 customers, or about 1 million people, in the San Antonio metropolitan area (including most of the city of San Antonio, several suburban municipalities, and adjacent parts of Bexar County). The utility is owned by the City of San Antonio. SAWS was formed in 1992 through a merger of three entities: the City Water Board, the City Wastewater Department, and the Alamo Water Conservation and Reuse District.

A2A S.p.A. municipal multi-utility supplies electricity, natural gas, and water and wastewater services to customers, mostly in the province of Milan. A2A's units operate power-generation plants with some 3,700 MW of capacity),. The company distributes electricity and natural gas to regulated customers, and wholesale electricity and gas to buyers. It also owns a fiber-optic network that covers the city. A2A is also a leading environmental service company, treating some 2.9 million tonnes of waste material.

Ohio Valley Electric and its subsidiary, Indiana-Kentucky Electric, generate power in the Ohio River Valley region. The company operates two coal-fired plants with collectively about 2,400 MW of generating capacity. Ohio Valley Electric's Kyger Creek Plant at Cheshire, Ohio, and Indiana-Kentucky Electric's Clifty Creek Plant at Madison, Indiana are linked by 776 miles of transmission lines. Most of Ohio Valley Electric's power goes to its shareholders, which include American Electric Power (39%), Buckeye Power Generating, LLC (18%), and Duke Energy Ohio (9%).

Marsulex is scrubbing up smokestacks in North America. The company provides outsourced air-quality regulation compliance services to the oil refinery and power generation industries. Among Marsulex's emission-control products are spent acid regeneration and sulphate scrubbing systems; the firm also processes and sells sulphur by-products. Customers in Marsulex's oil-refinery segment include Shell, Petro-Canada, BP, and Sunoco. The company provides services to power-generation customers worldwide. Marsulex operates seven plants in Canada and ten in the US, including one in Southern California. In 2009 investment firm Harrowston Holding acquired control of Marsulex.

Aquilex speaks softly and carries a big wrench. Through its operating subsidiaries, Aquilex Corporation provides maintenance, repair services and technical support to heavy industry worldwide. Customers include power generation facilities and other industrial plants, including cement, chemical, petrochemical, oil and natural gas processing, pulp and paper, metal refining, and steel manufacturing operations. The company was controlled by private equity firm Harvest Partners (which bought the company from First Reserve in 2007). In 2008 Harvest Partners sold the company to Teachers' Private Capital, the private investment arm of the Ontario Teachers' Pension Plan.

Plambeck Neue Energien develops and operates renewable power wind farms in Germany and other European countries. The company has developed 74 wind farms in Germany. Plambeck developed its first wind farm -- Windpark Marschland -- in 1995. The company bought SSP Technology A/S, a maker of light and efficient rotor blades based in Denmark. Plambeck has sold its solar business in order to focus on its wind farm operations. In 2006 the company announced plans to join with Evelop to develop an 80-wind turbine offshore wind farm project, Gode Wind I, in Germany. In 2008 Plambeck established a subsidiary in the US.

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