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.

Piedmont Natural Gas Company, Inc., an energy services company, distributes natural gas to residential, commercial, industrial, and power generation customers in portions of North Carolina, South Carolina, and Tennessee. It also operates various energy-related businesses, including unregulated retail natural gas marketing, interstate natural gas storage, and intrastate natural gas transportation. As of October 31, 2009, the company served 952,469 retail customers and 61,000 customers served by municipalities. Piedmont Natural Gas Company, Inc. was founded in 1949 and is headquartered in Charlotte, North Carolina.

Noble Environmental Power engages in the noble pursuit of producing power while keeping the environment clean by developing wind energy plants. It has about 730 MW of wind energy plants in operation and about 1,900 MW in the development pipeline. Noble Environmental Power has half a dozen operational plants in New York and one in Texas. The company has three more New York wind parks and one each in Minnesota, New Hampshire, and Texas under development. By 2012 Noble Environmental Power hopes to have a portfolio with a capacity of more than 3,850 MW. The company is controlled by a J.P. Morgan Partners, LLC unit.

Canadian Utilities is the strong arm of diversified energy company ATCO and accounts for most of its sales. Canadian Utilities' regulated utilities operations are ATCO Gas, which distributes natural gas to more than 1 million customers in almost 300 communities in Alberta, and ATCO Electric, which provides electricity to about 207,000 customers. ATCO Pipelines provides natural gas transportation services to producers, major industrial users and gas distribution companies in Alberta. Canadian Utilities' Energy unit (including ATCO Power, ATCO Midstream and ATCO Energy Solutions) manages power generation and pipeline activities. The Technologies segment provide business systems solution through ARCO I-Tek.

Severn Trent Services is intent on providing cleaner water for consumers around the globe. The company, a subsidiary of UK-based Severn Trent, provides water and wastewater purification services and products to utilities, bottling companies, and other clients, primarily in the US and the UK. Operations include water filtration and disinfection technologies, contract operations and maintenance, pipeline rehabilitation, and state-of-the-art residential metering products and services. Severn Trent Services' international management services unit supports all aspects of water and wastewater utility management.

Dominion Resources, Inc., together with its subsidiaries, engages in producing and transporting energy in the United States. It operates in three segments: DVP, Dominion Generation, and Dominion Energy. The DVP segment includes regulated electric transmission and distribution operations that serve residential, commercial, industrial, and governmental customers in Virginia and northeastern North Carolina. This segment also involves in non regulated retail energy marketing of electricity and natural gas. The Dominion Generation segment includes the electricity generation through coal, nuclear, gas, oil, and renewables; and related energy supply operations. It also comprises generation operations of the company’s merchant fleet and energy marketing, and price risk management activities for these assets. The Dominion Energy segment includes the company’s Ohio and West Virginia regulated natural gas distribution companies, regulated gas transmission pipeline and storage operations, natural gas gathering and by-products extraction activities, regulated LNG import and storage, and Appalachian exploration and production operations. It also provides producer services, which aggregates natural gas supply; engages in natural gas trading and marketing activities; and involves in natural gas supply management. The company’s portfolio of assets includes approximately 27,500 MW of generation; 6,000 miles of electric transmission lines; 56,000 miles of electric distribution lines; 12,000 miles of natural gas transmission, gathering, and storage pipeline; and 21,700 miles of gas distribution pipeline. Dominion Resources, Inc. also owns approximately 942 bcf of storage capacity of natural gas and serves retail energy customers in 12 states. In addition, it sells electricity at wholesale prices to rural electric cooperatives, municipalities, and into wholesale electricity markets. The company was founded in 1909 and is headquartered in Richmond, Virginia.

Delta Natural Gas Company, Inc. distributes or transports natural gas in central and southeastern Kentucky. It operates through two segments, Regulated and Non-Regulated. The Regulated segment sells and distributes natural gas to its retail customers primarily in 23 rural counties. This segment also transports gas to industrial customers on its system who purchase gas in the open market, as well as transports gas on behalf of local producers and other customers not on its distribution system. The Non-Regulated segment purchases natural gas in the open market, primarily from Kentucky producers, and resells this gas to industrial customers on its distribution system and to others not on its system. This segment also produces natural gas that is sold to Delgasco for resale in the open market. Delta Natural Gas Company, Inc. owns approximately 2,500 miles of natural gas gathering, transmission, distribution, storage, and service lines; and holds leases for the storage of natural gas under 8,000 acres located in Bell County, Kentucky. It serves approximately 37,000 customers. Delta Natural Gas Company, Inc. was founded in 1949 and is headquartered in Winchester, Kentucky.

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.

Piedmont Municipal Power Agency (Piedmont Power) generates, purchases, and transmits wholesale electricity on behalf of its 10 member municipal utilities, which distribute the power to nearly 95,000 retail customers in northwestern South Carolina. These ten utilities serve the cities of Abbeville, Clinton, Easley, Gaffney, Greer, Laurens, Newberry, Rock Hill, Union, and Westminster. Piedmont Power was created to buy an ownership interest in the Catawba Nuclear Station in York County, South Carolina, in order to secure a reliable source of electric generation for its member utilities.The agency currently owns a 25% stake in the Catawba plant.

Pepco Holdings has more power than any politician in the populace of the US capital. The holding company distributes electricity and natural gas through its Potomac Electric Power (Pepco), Delmarva Power & Light, and Atlantic City Electric utilities to about 1.9 million customers in Delaware, Maryland, New Jersey, and Washington, DC. Nonregulated operations include independent power production, wholesale and retail energy marketing, and energy management services, through the company's Pepco Energy Services units.

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