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.

UIL Holdings, parent of electric utility The United Illuminating Company (UI), hopes its well regulated business will result in regular revenue growth. The public utility distributes electricity to 325,000 customers in southwestern Connecticut. Its service area, largely urban and suburban, includes the principal cities of Bridgeport (population 137,000) and New Haven (population 124,000) and their surrounding areas. UIL Holdings has teamed up with NRG Energy to form GenConn Energy LLC, a joint venture that focuses on developing new power generation facilities in Connecticut. In 2010 the company acquired three gas utilies in New England from IBERDROLA USA for $1.3 billion.

The state-owned utility has 1,480 MW of generating capacity from hydroelectric and fossil-fueled power plants and operates a 2,000-mile transmission system. Grand River Dam Authority also manages two lakes.It took the dam authority of the State of Oklahoma to create the body that would dam the Grand River. The resulting power provider, the Grand River Dam Authority, is responsible for supplying wholesale electricity to municipal and cooperative utilities and industrial customers in its service territory, which encompasses 24 counties in northeastern Oklahoma.

Black Hills Power has been delivering energy for over 125 years. It was formed through the consolidation of several smaller electric suppliers in the Black Hills of South Dakota, Montana and Wyoming. Black Hills Power is an investor-owned utility and is part of the Black Hills Corporation family. The utility serves 63,500 customers in 20 communities located in Western South Dakota, Northern Wyoming, and Southeastern Montana.Our customers use 1,501,805,000 kilowatt hours (kWh) of electricity at an average price of $0.0714 per kWh. Cost containment efforts and customer load growth have provided our customers with stable residential electricity costs and our commercial electricity costs that are declining in real terms, and have remained stable for the last 11 years.

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.

Orival manufactures self-cleaning water filters, automatic water filters, and strainers for industrial and agricultural use as irrigation filters, cooling tower filters, industrial water filters, and HVAC filters. The company has installed units in more than 40 countries. Orival's products are flexible in design so that the company can cater to a wide range of customized orders and local requirements -- form single units, flange-to-flange systems, and complete skid mounted packages, to diverse construction standards, alternate flanges, and voltage standards.

Wheelabrator Technologies is on a roll. A subsidiary of solid-waste processing giant Waste Management, the company operates municipal-waste incinerators and trash-to-steam plants that convert 7 million tons of municipal solid waste annually into energy. Wheelabrator operates 16 waste-to-energy plants that burn solid waste to produce high-pressure steam; that steam turns turbines, generating more than 800 MW of electricity -- enough to power more than 900,000 homes. It also has five independent power producers (IPPs) that combust a combination of trash, waste wood, tires, coal, and gas to generate another 200 MW of electricity. Wheelabrator operates in the northeastern US, California, Florida, and Washington.

Calvalley Petroleum searches below the plateau for fuel for its customers. The company focuses on exploring for and producing oil and natural gas at Block 9 in the Republic of Yemen. The company, which has about 16 working wells (more than 50 have been drilled), produces some 5,000 barrels of oil each day. Its subsidiary Calvalley Petroleum (Cyprus) Ltd. is the operator of the property, which includes about 552,000 acres of land in the Sayun-Masila basin. Calvalley Petroleum has a net proved plus probable reserves of 7.8 billion barrels of oil equivalent.

Marsulex is scrubbing up smokestacks in North America. The company provides outsourced air-quality regulation compliance services to the oil refinery and power generation industries. Among Marsulex's emission-control products are spent acid regeneration and sulphate scrubbing systems; the firm also processes and sells sulphur by-products. Customers in Marsulex's oil-refinery segment include Shell, Petro-Canada, BP, and Sunoco. The company provides services to power-generation customers worldwide. Marsulex operates seven plants in Canada and ten in the US, including one in Southern California. In 2009 investment firm Harrowston Holding acquired control of Marsulex.

PPL packs a powerful punch in Pennsylvania, Kentucky and the UK, where it distributes electricity to 5.2 million customers through regulated subsidiaries PPL Electric Utilities (1.4 million customers), two utilities in Kentucky (1.2 million), and Western Power Distribution Holdings (2.6 million electricity customers). The company has 19,000 MW of generating capacity and also sells energy wholesale in key US markets. Once a global power player with interests in distribution companies worldwide, the company has opted for the UK as its non-US focus. Western Power Distribution operates two of the 15 distribution networks providing electricity service in the UK -- WPD (South West) and WPD (South Wales).

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