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.

FERSA Energias Renovables has found being green isn't too difficult. The Spanish holding company invests in and operates companies that produce electricity utilizing such renewable energy resources as wind power, solar energy, and biomass. The company's holdings span the European continent with investments in wind farms in Spain, Estonia, and Italy as well as holdings in Panama, India, and China. Holdings include Eolica el Pedregoso, Elolica de Pino, Parque Eolico Hinojal, Enrilews, and OU Est Wind Power. The company also has holdings in solar power and biomass operations in Spain through Invetem Mediterranea and Gestora Fotovoltaica de Castellon.

Pepco Energy Services continues to sail right along. The company provides electricity and natural gas to residential, commercial, industrial, and governmental customers in deregulated areas (primarily the US eastern seaboard, Chicago, and Texas). The nonregulated energy supply company, a subsidiary of Pepco Holdings, offers services in energy management, energy-efficiency consulting, "green power" facilities development and construction, and equipment maintenance. It operates two power plants with a aggregate capacity of 790 MW. Pepco Energy Services also provides its customers the choice of sourcing power from green sources (from solar, wind, and biomass plants).

The Native American inhabitants of Georgia may have used flint to spark the fires that brought light to their dwellings. Central Georgians today rely on the Flint Electric Membership Corporation, which does business as Flint Energies, to light their homes. Flint Energies serves 250,000 residential, commercial, and industrial customers (through 82,500 meters) in 17 counties, Fort Benning, and the city of Warner Robins. The customer-owned cooperative operates more than 6,250 miles of distribution line and about 50 substations. Flint Energies first flicked the switch in 1937.

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.

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.

Pennon Group Plc South West Water subsidiary provides water and wastewater services to more than 1.6 million people (more during the summer tourism season) in England's South West region, including Devon, Cornwall, and parts of Dorset and Somerset. South West Water's Echo South West unit contracts to run customer service operations for utilities. Pennon subsidiary Viridor Waste -- one of the largest waste management businesses in the UK -- offers solid waste collection, landfill disposal, and recycling and other services.

American Water Works Company, Inc. provides water and wastewater services to residential, commercial, and industrial customers in the United States and Canada. As of December 31, 2009, the company served approximately 16 million people with drinking water, wastewater, and other water-related services in 35 states and two Canadian provinces. It owned approximately 80 surface water treatment plants, 600 groundwater treatment plants, 1,200 groundwater wells, 50 wastewater treatment facilities, 1,200 treated water storage facilities, 1,200 pumping stations and 100 dams, and 49,000 miles of mains and collection pipes. American Water Works Company also enters into public/private partnerships, including operation and maintenance contracts; and design, build, and operate contracts for the provision of services to water and wastewater facilities for municipalities and the United States military. In addition, the company designs, builds, and operates smaller-scale water and wastewater treatment plants for real estate developers, industrial companies, and new or expanding communities; and provides services to domestic homeowners to protect against the cost of repairing broken or leaking pipes inside and outside their homes. Further, it provides granular activated carbon for water purification, and involves in the management and disposal of biosolids and wastewater by-products for municipal and industrial customers. The company was founded in 1886 and is based in Voorhees, New Jersey.

United Utilities Group PLC, through its subsidiaries, engages in the ownership, operation, and maintenance of water and wastewater networks in the United Kingdom and internationally. It supplies water covering a population of approximately 7 million people, and 2.9 million households and business premises; and involves in the collection and treatment of wastewater through a network of 43,419 kilometers of sewers. The company also operates electricity distribution network, and high voltage networks for businesses; and gas distribution network, as well as pipes and the equipment used to pump, condition, and store gas. In addition, United Utilities Group PLC provides consulting services and project management services; property management services; multi-utility metering operations and metering installation services; technical and management services; and asset management services. The company was formerly known as United Utilities Newco Limited and changed its name to United Utilities Group PLC in April 2008. United Utilities Group PLC was founded in 1989 and is headquartered in Warrington, the United Kingdom.

ITC Holdings Corp. (NYSE: ITC) invests in the electricity transmission grid to improve electric reliability, expand access to markets, lower the overall cost of delivered energy and allow new generating resources to interconnect to its transmission systems. The largest independent electricity transmission company in the country, ITC operates high-voltage transmission systems in Michigan’s Lower Peninsula and portions of Iowa, Minnesota, Illinois, Missouri and Kansas, serving a combined peak load in excess of 25,000 megawatts through its regulated operating subsidiaries, ITCTransmission, Michigan Electric Transmission Company (METC), ITC Midwest and ITC Great Plains. ITC also focuses on new areas where significant transmission system improvements are needed through ITC Grid Development and its subsidiaries.

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