Middle Tennessee Electric Membership Corporation's service territory is smack dab in the middle of Tennessee. The utility company distributes electricity to about 180,000 residential and business customers (member/owners) in four counties (Cannon, Rutherford, Williamson, and Wilson), via 10,000 miles of power lines connected to about 30 electric distribution substations. Middle Tennessee Electric purchases its power supply from the Tennessee Valley Authority. The corporation is Tennessee's largest electric cooperative and the sixth largest in the US.

Fortis wields power. The group has holdings in 10 companies, primarily regulated electricity and gas distributors, serving about 2 million customers. Its Terasen unit is the major natural gas distribution utility in British Columbia and serves approximately 940,000 customers. Newfoundland Power utility distributes electricity to 240,000 people, while Maritime Electric serves customers on Prince Edward Island. FortisOntario serves parts of Ontario, and FortisAlberta distributes electricity to 480,000 customers in Alberta. FortisBC generates, transmits, and distributes electricity in southern British Columbia. Fortis Generation operates hydroelectric plants, and Fortis Properties runs hotels in Canada.

Equisol, LLC can't part seas, but it can see to it that water is flowing correctly through the water/wastewater systems at companies. Equisol specializes in supplying water and wastewater products, equipment, and services to industrial, governmental, and commercial industries nationwide. Serving mainly medium to large-sized companies, Equisol does everything from supplying pumps and chlorinators to designing and installing water/wastewater systems. Additionally, the company offers their customers consulting, training, emergency response, and various other services. In 2009 powder coating and technology business Xiom Corp. acquired the company.

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.

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.

Ozocan can meet the ozone generator and purifier needs of its water and waste water clients. Ozocan (formerly Hankin Water Technologies) provides water-purification equipment for aquaculture, commercial aquariums, drinking-water treatment, industrial-waste treatment, and other uses. The company has also supplied ozone to laminating plants to speed up the application of polyethylene to paper. Ozone systems have been used to treat drinking water for decades, in both municipal and commercial bottling plants, and have been widely used in swimming pools since the 1950s. The company was established in 1954.

Ratchaburi Electricity Generating is a powerful force. The company, known as Ratch, is Thailand's largest independent electric utility. Subsidiary Ratchaburi Electricity Generating Company runs the power plant, which has a total capacity of about 4,500 MW of electricity. Ratchaburi Energy Company, the other major subsidiary, funds smaller power plants and other power generating operations. Ratch also owns stakes in ethanol and natural gas companies and it participates in a joint venture with SouthEast Asia Energy to run a hydro-electricity plant in Laos. Established in 2000, the company is 45% owned by the Thai government via the EGAT Public Company.

Summerleaze has blown through a number of businesses -- aggregates, waste disposal, and renewable energy. The family-owned company, originally in the gravels/aggregates business, branched into using methane gas from the waste disposal landfills to make fuel. After acquiring renewable energy firm Thomas Graveson, it created Summerleaze RE-Generation, which has enough capacity (43 MW) to serve 70,000 houses from sites across the UK. Ennate Technology provides power generation equipment sales, maintenance, and hire services; its Green Hydrogen subsidiary supplies renewable hydrogen and oxygen for clients. Summerleaze also has a biogas unit, Summerleaze AnDigestion.

RainSoft (a division of Aquion Water Treatment Products) wants to clear up the water in your home or office. Through its division, the company makes residential and commercial water treatment equipment. Products include whole-house water conditioning systems, drinking water systems, and filters designed to remove particular contaminants that detract from water's taste and odor. RainSoft's products are distributed through a network of about 300 independent dealers in the US and in 24 countries in Asia, Europe, and the Middle East. Clients have included Allstate , Dow Chemical, Ford Motor, Holiday Inn, and Underwriters Laboratories.

Calpine Corporation, an independent wholesale power generation company, engages in the ownership and operation of natural gas-fired and geothermal power plants in North America. It generates electricity and produces steam from natural gas-fired combustion and renewable geothermal facilities. The company sells wholesale power, steam, capacity, renewable energy credits, and ancillary services to utilities, independent electric system operators, industrial and agricultural companies, retail power providers, municipalities, and power marketers. As of December 31, 2009, the company had a portfolio of 77 operating power plants with an aggregate generation capacity of approximately 24,802 megawatts. Calpine Corporation was founded in 1984 and is based in Houston, Texas.

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