South West Water, one of the main subsidiaries of Pennon Group, provides water and wastewater services to 1.6 million people (more during the summer tourism season) in England's South West region. The company's service territory covers nearly 4,300 square miles and includes Devon, Cornwall, and parts of Dorset and Somerset. South West Water maintains more than 9,320 miles of water mains. Because 8 million tourists come to the region annually to swim at its numerous beaches, the utility is responsible for environmental cleanup in the region. It instituted a Clean Sweep program to improve the treatment of coastal sewage and meet European Union guidelines. The utility was privatized in 1989.

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.

CMS Energy Corporation, through its subsidiaries, operates as an energy company primarily in Michigan. It operates in three segments: Electric Utility, Gas Utility, and Enterprises. The Electric Utility segment engages in the generation, purchase, distribution, and sale of electricity. The Gas Utility segment involves in the purchase, transmission, storage, distribution, and sale of natural gas. The Enterprises segment engages in independent power production and marketing. This segment owns power generation facilities fueled mostly by natural gas and biomass. At December 31, 2009, this segment had ownership interests in independent power plants totaling 1,202 gross Megawatt. The company serves individuals and companies operating in the alternative energy, automotive, chemical, metal, food products, and various other industries. As of December 31, 2009, it served 1.8 million electric customers and 1.7 million gas customers. The company was founded in 1987 and is based in Jackson, Michigan.

Guangzhou Development Industry helps keep the lights on in China's Pearl River Delta. Established in 1997, the company is the largest power producer in Guangzhou province, with stake in about 10 coal-fired power plants with 2,100 MW of generating capacity. Guangzhou's energy logistics division operates an 80,000-ton deep-water coal-loading terminal and a 340,000-ton coal storage field. Nansha Oil Terminal, its joint venture with BP, has expanded Guangzhou's oil products distribution services throughout the region. The company is also a shareholder in Guangzhou Northern No. 2 Ring Expressway, a key toll road operating in the Pearl River Delta

Power and Texas come together at the Texas Municipal Power Agency, which provides electricity generation and transmission services to four municipal utilities (Bryan, Denton, Garland, and Greenville). The joint powers agency, which was created in 1975 by its member cities, owns and operates the 462-MW Gibbons Creek power plant and related transmission assets. In the wake of the oil embargo the early 1970s, the Texas Legislature created joint powers agencies that could perform all the duties of utilities except sell power to non-members. Bryan, Denton, Garland, and Greenville then formed the Texas Municipal Power Agency and harnessed locally available lignite to fuel a power generation plant.

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.

Sempra Energy, together with its subsidiaries, engages in the development of energy infrastructure, operation of utilities, and provision of energy-related products and services worldwide. It operates through two divisions, Sempra Utilities and Sempra Global. The Sempra Utilities division includes San Diego Gas & Electric, a regulated public utility that provides electric generation, transmission, and distribution services to 3.5 million consumers, and natural gas distribution services to 3.2 million consumers; and Southern California Gas, a regulated public utility that provides natural gas distribution, transmission and storage services to a population of 20.7 million. The Sempra Global division comprises of Sempra Commodities, a commodities-marketing business operating under the joint venture, RBS Sempra Commodities, with The Royal Bank of Scotland; Sempra Generation, which develops, owns and operates, or holds interest in electric power plants serving wholesale electricity markets in North America; Sempra Pipelines & Storage that develops, owns, operates, or holds interests in natural gas pipelines and storage facilities in the United States and Mexico, as well as in companies that provide natural gas or electric services in Argentina, Chile, Mexico, and Peru; and Sempra LNG, which develops, owns, and operates receipt terminals for importing liquefied natural gas. Sempra Energy was founded in 1998 and is headquartered in San Diego, California.

Thames Water Holdings plc provides regulated water to 8.5 million customers and wastewater services to about 13.6 million people in London and the Thames Valley. It operates 100 water treatment plants, about 290 pumping stations, and 235 reservoirs. On the wastewater side of the business the company operates 43,500 miles of sewer lines and 350 wastewater treatment plants. In addition to its water and wastewater operations, Thames Water offers consulting, infrastructure, project management, engineering, and maintenance services. The company is controlled by Kemble Water Limited.

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.

Not-for-profit holding company Glas Cymru owns Dwr Cymru Welsh Water, one of the largest regulated water and sewerage companies in the UK. Welsh Water distributes water and provides wastewater services to 1.3 million household customers and more than 100,00 business customers in Wales and England. It has a network of about 560 service reservoirs. The company supplies 850 million liters of drinking water daily through its 27,000-km network of water mains. Its sewer system includes 19,000-km of sewers and more than 800 wastewater-treatment works. Formed in 2000, Glas Cymru bought Welsh Water from Western Power Distribution in 2001. Western Power Distribution had acquired Hyder, Welsh Water's parent, in 2000.

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