Degremont designs, builds, and operates water treatment plants worldwide to purify water and treat wastewater. The company has operations in more than 70 countries, and its plants provide more than 1 billion people with potable water. It is a specialist in designing and constructing facilities for seawater desalination by the means of reverse osmosis. It also designs and builds sludge treatment facilities. In the US the group operates through subsidiary Infilco Degremont. United Water formed a joint venture with Infilco Degrement in 2009 to operate a Water Environmental Research Center in Richmond,Virginia.

ALLETE provides light to the northern climes. Most of its business is classified within its regulated operations, which include electric, gas, and water utilities located in northeastern Minnesota and northwestern Wisconsin. Those operations are conducted through subsidiaries Minnesota Power (about 145,000 customers) and Superior Water, Light and Power (about 35,000 customers for its electric, gas, and water utilities). ALLETE's other segment includes coal mining operations, emerging technologies related to electric utilities, and a real estate business (large land tracts in Florida). Subsidiary BNI Coal operates a mine in North Dakota that supplies, primarily, two generating co-ops, Minnkota Power and Square Butte.

GAIL (India) Limited is no blowhard when it comes to turning energy into profits. The largest gas transmission and marketing company in India, GAIL owns more than 6,700 km of pipeline and has a 78% market share in India's natural gas transmission business. It has seven gas processing units and owns India's largest gas-based petrochemicals complex. In addition, GAIL has major domestic exploration and production operations. It also has a fiber-optic cable network of 13,000 km that provides bandwidth to telecommunications carriers. It is also involved in liquefied natural gas import projects. In 2010 GAIL (India) Limited expressed an interest in buying US shale assets. The government of India owns 57% of the company.

The utility provides electricity to 490,000 residential, commercial, and industrial customers over nearly 32,000 miles of transmission and distribution lines. Idaho Power holds franchises in 71 cities in Idaho and nine in Oregon. It also owns power plant interests that give it a generating capacity of more than 3,000 MW. In addition, the company, a subsidiary of IDACORP, has a 33% stake in the Bridger Coal Company, which supplies fuel to the Jim Bridger generating plant in Wyoming.Idaho Power lights up spud farms and factories in southern Idaho and eastern Oregon.

Carbtrol doesn't care about your carbohydrate consumption; instead, the company works to protect the health of the environment. Carbtrol makes activated carbon filters for air and water treatment, along equipment used for groundwater remediation and soil vapor extraction. In addition, the company supplies treatment systems designed to allow golf courses and car washes to recycle water. Carbtrol was founded in 1983. The company's primary product in the early years was activated carbon systems. It expanded its product line to include engineered packages using air stripping, vapor extraction technologies, and ion exchange treatment.

Midwesterners can feel the power, thanks to Midwest Independent Transmission System Operator (Midwest ISO), which monitors and coordinates the operation of an electric transmission system with 56,300 miles of transmission lines across 13 Midwestern states and one Canadian province. It manages energy markets with almost $23 billion in annual energy transactions. The Regional Transmission Organization (RTO) ensures fair access to the grid and facilitates communication between its members, which include investor-owned, cooperative, and municipal utilities, as well as power marketers and independent transmission companies. Midwest ISO also provides wholesale electric service across much of the region.

Energen Corporation, an energy holding company, engages in the acquisition, exploration, development, and production of oil, natural gas, and natural gas liquids in the continental United States. It also involves in the purchase, distribution, and sale of natural gas to residential, commercial, and industrial customers, as well as other end-users of natural gas in central and north Alabama. In addition, the company provides gas transportation services for industrial and commercial customers located on its distribution system. As of December 31, 2009, Energen Corporation had proved oil and gas reserves of 1,547 billion cubic feet equivalent in the San Juan Basin in New Mexico and Colorado, the Permian Basin in west Texas, and the Black Warrior Basin in Alabama. Energen Corporation was founded in 1929 and is headquartered in Birmingham, Alabama.

Union Gas has a habit of bringing natural gas and energy consumers together. The utility, a subsidiary of midstream maven Spectra Energy transmits and distributes natural gas to more than 1.3 million residential and business customers in more than 400 communities throughout most of the Canadian province of Ontario. It also provides gas transportation and storage services for other utilities and businesses in Canada and the US. Union Gas operates 3,000 miles of transmission pipeline, 37,000 miles of distribution main and service pipeline, and 22 underground storage facilities.

Infiltrator Systems is not connected to The Spy Who Came In From The Cold, spy satellites, or any other relic of Cold War espionage. The company is the world's leading maker of plastic leachfield products used to handle commercial and residential wastewater. Infiltrator Systems' leachfield drainage chambers are a direct and cost-effective replacement for stone and pipe leachfields, and create a footprint only half the size of traditional leachfields. The products, which are made at facilities in Kentucky and Utah, are sold throughout the US. The company estimates that one in four septic systems in the US uses Infiltrator Systems' products.

Snam Rete Gas (formerly Snam S.p.A.) transmits natural gas across Italy, managing a network of about 19,300 miles of transmission pipeline. The network includes eight regional centers, 55 local management centers, and 11 compressor stations, and transports more than 83 billion cubic meters of natural gas a year. The company is also the only liquefied natural gas (LNG) regasification and storage services provider in Italy (operating through subsidiary GNL Italia). Energy behemoth Eni controls Snam Rete Gas, which was formed in 2001. In 2009 Eni consolidated its gas units, and sold its Italgas gas distributor and its Stogit gas storage unit to Snam Rete.

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