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.

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.

United Water is a part of global water player SUEZ Environnement, and is one of the largest water companies in the US. The company distributes water and provides wastewater services to about 7 million people, including residential, commercial, and industrial customers. United Water provides services through a number of utility subsidiaries and through its contracts with several municipalities. The company operates almost 250 municipal water systems and owns utilities in 20 states across the country.

Down by the riverside there's power, and City of Riverside, California, Electric Utility (which does business as Riverside Public Utilities) distributes it to more than 105,000 residential, commercial, and industrial customers and water to more than 63,000 customers in Riverside, California. The municipal electric utility has interests in power plants (partly through its membership in the Southern California Public Power Authority), and it buys and sells wholesale power. City of Riverside, California, Electric Utility also owns water wells and treatment facilities.

Midwest Energy for their power and gas needs. The utility serves approximately 48,000 electricity customers and 42,000 natural gas customers in central and western Kansas. It also has some power generation operations; it purchases most of its electric supply from wholesale marketers. The company's Midwest United Energy subsidiary is a competitive natural gas supplier in four states, and its WestLand Energy unit sells propane to Kansas consumers; it has sold its telecommunications business. Midwest Energy was formed in 1981 when the Central Kansas Electric Cooperative acquired investor-owned Central Kansas Power.

Pampa Energ�a is one of Argentina's largest fully integrated electricity companies. Through subsidiaries or co-controlled companies, it generates more than 7% of the total electricity in Argentina, transmits some 95% of the country's electricity through transmission lines owned and operated by subsidiary Transener, and distributes electricity to more than 2.6 million residential and commercial customers through subsidiary Empresa Distribuidora y Comercializadora Norte (Edenor), the largest electricity distributor in Argentina. Pampa Energ�a maintains fossil fuel, thermal, and hydroelectric generation operations. Its distribution, transmission, and hydroelectric activities are regulated by Argentina's government.

ATCO operates worldwide in utilities, power generation, and related services. Majority-owned Canadian Utilities oversees most of the group's energy businesses, including ATCO Electric and ATCO Gas (transmission and distribution) and ATCO Power (generation). Other holdings include gas gatherer and processor ATCO Midstream, and gas transporter ATCO Pipelines. ATCO I-Tek provides IT, billing, and customer care services. ATCO Structures & Logistics manufactures modular buildings and provides logistical and noise abatement services. Utilities ATCO Electric (with nearly 207,000 customers) and ATCO Gas (with more than 1 million customers) account for the largest slice of ATCO's revenues.

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.

Pacific Northern Gas (PNG) provides natural gas in west-central and northeastern British Columbia. The utility serves more than 39,100 residential, commercial, and industrial customers over its transmission and distribution system. Its large industrial customers include timber company West Fraser and metals maven Rio Tinto Alcan. In 2008 these customers accounted for about 26% of PNG's annual total gas deliveries and more than 5% of its revenues. British Columbia Hydro and Power Authority (BC Hydro) is also a major customer. Most of PNG's customers buy gas directly from producers or suppliers but contract with PNG to have it pipelined to them. Pacific Northern Gas Ltd. entered the renewable power business in 2010.

Artesian Resources Corporation, through its subsidiaries, provides water, wastewater, and engineering services on the Delmarva Peninsula. It distributes and sells water to residential, commercial, industrial, governmental, municipal, and utility customers in the states of Delaware, Maryland, and Pennsylvania. The company also provides water for public and private fire protection to customers in its service territories. In addition, it designs and builds water and wastewater infrastructure; and provides contract water, wastewater, and engineering services. As of December 31, 2009, the company had approximately 76,900 metered customers and 730 wastewater customers, and served a population of approximately 276,000. It served customers through approximately 1,124 miles of transmission and distribution mains. The company was founded in 1905 and is headquartered in Newark, Delaware.

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