OGE Energy is the holding company for the largest electric utility in Oklahoma, but its largest revenue producer is its energy marketing and natural gas transmission unit, OGE Energy Resources. OGE owns Oklahoma Gas and Electric (OG&E), a public utility with almost 777,000 retail and wholesale customers in Oklahoma (including Oklahoma City) and a bit of western Arkansas. OG&E owns coal- and gas-fired power plants that generate 6,420 MW of capacity. Subsidiary Enogex operates 7,900 miles of natural gas gathering and transportation pipeline. The company also provides physical, asset, financial management services through marketing unit OGE Eenergy Resources.

Tokyo Electric Power Company (TEPCO), which supplies power to a population of 44 million customers in Tokyo, Yokohama, and the rest of the Kanto region. One of the world's largest electric utilities, TEPCO's 190 power plants have the generating capacity of approximately 64,000 MW, primarily produced by thermal, nuclear, and hydroelectric power sources. Through interests in telecom businesses, the company offers telephony and Internet services; it also has international consulting and power generation operations. Other businesses include construction, real estate, and transportation companies. It also invests in independent power producers in other countries.

Southern California Edison (SCE) distributes electricity to a population of more than 13 million people in central, coastal, and Southern California (excluding Los Angeles and some other cities in the regions). The utility's system consists of about 12,000 circuit miles of transmission lines and more than 113,500 circuit miles of distribution lines. SCE also has 5,500 MW of net generating capacity from interests in nuclear, hydroelectric, and fossil-fueled power plants; it sold most of its fossil-fueled facilities in response to the state's deregulation legislation. The utility sells excess power to wholesale customers. SCE is a subsidiary of Edison International.

Wolverine Power Supply Cooperative makes sure that that voracious consumer of electricity -- the American public -- gets the power its needs. The non-profit company is an electric generation and transmission utility that provides services to five member distribution cooperatives in Michigan. Wolverine Power Supply Cooperative monitors and operates 1,600 miles of bulk transmission lines and owns five power plants that generate 200 megawatts of capacity. It also maintains about 130 distribution substations and 36 transmission stations, as well as purchases power (including windpower energy) from other utilities and marketers to distribute to its customers.

Owensboro, Kentucky (named after Abraham Owen, a Shelby County legislator killed in the Battle of Tippecanoe) is served by Owensboro Municipal Utilities, which provides power to almost 26,000 customers and water to 24,500. The city-owned utility operates water treatment facilities and a power plant that uses coal and used tires for fuel. Its operating divisions are Elmer Smith power plant, Engineering & Operations, Water Production, and Customer Service Center. It also offers telecommunications services. Owensboro Municipal Utilities is overseen by the five-member Owensboro Utility Commission, which is appointed by the mayor of Owensboro.

Sometimes the sunshine state just isn't bright enough, and that's when Florida Power (doing business as Florida Power) really shines. The utility transmits and distributes electricity to 1.6 million customers and oversees more than 10,000 MW of generating capacity from interests in 14 nuclear and coal-, oil-, and gas-fired power plants. Additionally, Florida Power purchases about 20% of the energy it provides. The company is interconnected with 22 municipal power systems and with nine rural electric cooperative systems. Florida Power, a subsidiary of holding company Progress Energy, also sells wholesale power to other utilities and marketers.

Southern Pine Electric Power Association (Southern Pine EPA) delivers the consumer-owned utility cooperative that serves about 65,000 members in south central Mississippi. The cooperative provides power over more than 10,000 miles of line to some 60,400 residential meters and 4,600 commercial meters. A board of directors, elected by Southern Pine EPA membership, sets the policies and establishes the business structure of the organization, which is led on a day-to-day operational basis by a general manager. Southern Pine EPA established four district offices in 1994 to enable the cooperative to better serve its large service area.

Società Azionaria per la Condotta di Acque Potabili provides non-potent potables for Italian citizens and industrial plants. Acque Potabili provides water services to more than 100 municipalities in the country, which have more than 800,000 residents combined; its water distributors include Acquedotto Monferrato and Acquedotto di Savona. Italgas, which is controlled by energy conglomerate Eni, owned a 67% stake in Acque Potabili, but has since sold it to Azienda Mediterranea Gas e Acqua (AMGA) and Società Metropolitana Acque Torino (SMAT). The company's other major shareholders include Vivendi (14%) and ACEA (14%).

EQT Corporation, together with its subsidiaries, operates as an integrated energy company in the United States. The company operates in three segments: EQT Production, EQT Midstream, and Distribution. The EQT Production segment engages in the exploration, development, and production of natural gas and crude oil in the Appalachian Basin. This segment’s properties are located primarily in Kentucky, West Virginia, Virginia, and Pennsylvania. As of December 31, 2009, it had 4.1 trillion cubic feet of proved reserves across 3.4 million acres. The EQT Midstream segment provides gathering, processing, transmission, and storage services to third parties in the Appalachian Basin. It has approximately 10,650 miles of gathering lines and 970 miles of transmission lines. The Distribution segment engages in the distribution and sale of natural gas to residential, commercial, and industrial customers in southwestern Pennsylvania, West Virginia, and eastern Kentucky. This segment served natural gas to approximately 275,900 customers comprising of 257,300 residential, and 18,600 commercial and industrial customers. The company was formerly known as Equitable Resources, Inc. and changed its name to EQT Corporation in February 2009. EQT Corporation was founded in 1925 and is headquartered in Pittsburgh, Pennsylvania.

Trojan Technologies wants to zap you. The company manufactures ultraviolet (UV) lighting systems for disinfecting wastewater and treating contaminated soil and groundwater. Trojan's wastewater treatment systems are used in about 4,000 municipalities in 50-plus countries. The company's UV light systems work by altering the DNA in microorganisms and are an alternative to traditional chlorine-based disinfection systems. Trojan also makes UV products that cleanse water used in industrial processes such as food production and electronics manufacturing. Other products include residential UV systems for drinking water. Danaher controls Trojan.

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