American Electric Power Company, Inc. engages in the generation, transmission, and distribution of electric power. It generates electricity using coal and lignite, natural gas, nuclear, and hydroelectric energy. The company distributes electric power at wholesale to other electric utility companies, rural electric co-operatives, municipalities, and other market participants, as well as to retail customers in its service areas. It also operates nonregulated wind farms and barging operations, as well as provides various energy-related services. The company operates in the states of Arkansas, Indiana, Kentucky, Louisiana, Michigan, Ohio, Oklahoma, Tennessee, Texas, Virginia, and West Virginia. As of December 31, 2008, it owned or leased approximately 37,000 megawatts of power generation capacity. The company was founded in 1906 and is based in Columbus, Ohio.

Salt River Project (SRP) provides Phoenix with two types of currents: electric and water. Electricity comes from the Salt River Project Agricultural Improvement and Power District, a political subdivision of the State of Arizona that has a generating capacity of about 8,100 MW and distributes power to about 934,000 homes and businesses. The district also sells excess power to wholesale customers. Water comes from the Salt River Valley Water Users' Association, a private firm that delivers almost 1 million acre-feet of water per year to residents and agricultural irrigators; the association also operates dams, canals, reservoirs, and wells in its service area.

ReliOn relies on its ability to produce hydrogen fuel cells in order to make money. The company claims to be the world's leading developer and marketer of modular, cartridge-based, proton exchange membrane fuel cell technology. ReliOn markets a range of stationary fuel cells for emergency and back up power systems, uninterruptible power supplies, digital power needs and a range of off grid power requirements. The company has sold and installed more than 2 MW of products with private and public entities in the energy, telecommunications, and transportation segments. Investors include Avista, Enterprise Partners Venture Capital, and Wall Street Technology Partners.

Compressco Partners puts the pressure on before the natural gas and oil wells run dry. The company specializes in providing services to more than 400 natural gas and oil companies across 14 states to increase production and total recoverable reserves. The company offers compression, liquids separation, and gas metering services, as well as the GasJack units that perform these operations. It applies its services primarily to mature wells, but also on newer wells, which have declined in production. Compressco Partners, a subsidiary of TETRA Technologies, also provides well evaluations and well testing and monitoring services in Mexico.

Snam Rete Gas (formerly Snam S.p.A.) transmits natural gas across Italy, managing a network of about 19,300 miles of transmission pipeline. The network includes eight regional centers, 55 local management centers, and 11 compressor stations, and transports more than 83 billion cubic meters of natural gas a year. The company is also the only liquefied natural gas (LNG) regasification and storage services provider in Italy (operating through subsidiary GNL Italia). Energy behemoth Eni controls Snam Rete Gas, which was formed in 2001. In 2009 Eni consolidated its gas units, and sold its Italgas gas distributor and its Stogit gas storage unit to Snam Rete.

Scottish Water provides water and wastewater services to 5 million customers in 2.4 million homes. The company, which is the one of five largest water utilities in the UK, operates about 29,340 miles of water mains, 31,150 miles of sewers, 300 water treatment works, and more than 1,900 wastewater treatment works. The government-owned company, which is overseen by the Scottish Parliament, is focusing on upgrading its provision of clean drinking water, making its services more efficient and helping to improve the environment by protecting the watersheds that supply the company's water.

California Water Service Group, through its subsidiaries, provides water utility and other related services in California, Washington, New Mexico, and Hawaii. It engages in the production, purchase, storage, treatment, testing, distribution, and sale of water for domestic, industrial, public, and irrigation uses, as well as for fire protection. The company also provides non-regulated water-related services, including the operation of water and recycled water systems; leasing communication antenna sites on its properties; meter reading and billing services; sewer and refuse billing services; lab services for water quality testing; selling surplus property; and the marketing and billing of third party insurance programs to residential customers. As of December 31, 2009, it served approximately 467,100 customers in 83 communities in California; 15,600 customers in the Tacoma and Olympia areas in Washington; 7,800 water and wastewater customers in the Belen, Los Lunas, and Elephant Butte areas in New Mexico; and 4,200 water and wastewater customers on the islands of Maui and Hawaii. The company was founded in 1926 and is headquartered in San Jose, California.

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.

Ferrostaal Incorporated is betting on the sun. The company is a subsidiary of the German industrial and heavy construction conglomerate Ferrostaal AG and provides its parent's alternative energy business in North America. It operates, with Solar Millennium, a joint venture called Solar Trust of America (STA) that concentrates on solar power generation. The International Petroleum Investment Company of Abu Dhabi bought a majority stake in Ferrostaal from MAN SE in 2009 and dropped the former parent company's brand from what had been called MAN Ferrostaal.

Florida Municipal Power Agency doesn't believe in holding on to power. The non-profit public agency generates and supplies electric power to 30 county or municipally owned distribution utilities, which in turn serve 2 million Florida residents and businesses. Each of the distribution utilities appoints one representative to Florida Municipal Power Agency's board of directors, which governs the agency's activities. The Agency is authorized to undertake joint projects for its members and to issue tax-exempt bonds to finance the costs of such projects. It is also empowered to implement a pooled financing program for utility-related projects.

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