Anglian Water provides regulated water, wastewater, and environmental services to some 6 million residential, commercial, and industrial customers, primarily in eastern England. The main operating subsidiary of AWG, it provides water services to 4.2 million customers across East Anglia and the East Midlands, supplying 1.2 billion liters of water daily. Anglian Water maintains a network of more than 37,000 km of water mains and treats wastewater (from 5.5 million customers) at its more than 1,100 sewage treatment works. The company also manages water and wastewater systems for the City of Hartlepool in northern England.

Electricity Supply Board (ESB) is a leading electricity utility in Ireland, providing electricity generation, distribution, and supply. The state-owned company has several divisions that operate independently in the electricity market. Its ESB Power Generation unit operates 13 power stations in Ireland. Its generation plants have an installed capacity of more than 4,650 MW and serve a customer base of about 2 million. The group's ESB Networks owns the high-voltage transmission network and other distribution systems. ESB International develops power projects, including renewable energy plants worldwide; the company has installed 77 MW of wind farms in Ireland, and in 2010 acquired a 35 MW wind farm in Wales.

American Transmission Company is an entrepreneur in the US power grid business. Connecting electricity producers to distributors, American Transmission owns, operates, monitors, and maintains 9,400 miles of high-voltage electric transmission lines and 510 substations in portions of Illinois, Michigan, Minnesota, and Wisconsin. American Transmission is one of the first for-profit transmission companies, formed when the US market deregulated in the early 2000s. The company operates the former transmission assets of some of its shareholders. About 30 utilities, municipalities, municipal electric companies, and electric cooperatives in its service area have an ownership stake in American Transmission.

Water is delivered by Mediterranea delle Acque (formed by the early 2006 merger of Italian water utilities Ferrari -- Acquedotto De Ferrari Galliera, Acquedotto Nicolay, Acqua Italia, and Genova Acque. Prior to the merger Acquedotto De Ferrari Galliera delivered about 45 million cubic meters (1.5 billion cubic feet) of water annually to about 350,000 customers. The company is also is involved in firefighting services, electricity sales, and water well-drilling. Rome-based utility AMGA owns 68% of the company.

Coast Electric Power Association when it comes to providing residents in three southern Mississippi counties with electricity. The utility uses a 6,400-mile distribution network to serve its more than 76,000 members (the great majority or which are residential customers) in Hancock, Pearl River, and Harrison counties. Coast offers electronic fund transfer and average monthly payment plans and rebates on energy efficient home improvements. The utility's power is generated by South Mississippi Electric Power, an association of Coast and 10 other cooperatives. It partners with Touchstone Energy Cooperatives.

Clearford Industries provides water and wastewater management and sewage treatment services throughout North America. For rural areas the company's patented Small Bore Sewer technology obviates the need for a septic tank by using pipes with a narrow diameter -- as opposed to larger ones used in urban systems -- to transport waste from a residence to a wastewater treatment plant. In 2008 the company sold its Brooklin Concrete division, a leading producer of septic tanks in Ontario, to Armtec Limited Partnership.

First Wind, wind is the first and last item in its business model. The vertically integrated energy company (formerly UPC Wind) develops, owns, and operates wind energy plants in the Northeastern and Western US, and Hawaii. Its six projects in Hawaii, Maine, Vermont, New York, and Utah generate more than 500 MW of electricity. First Wind, which targets states with high energy prices, renewable energy requirements, and favorable wind conditions, plans to have more than 2,000 MW of capacity by the end 2014. The company was formed in 2002 by individuals experienced with building wind power plants in Italy. In 2010 First Wind began construction of its 102 MW Utah-based Milford Wind project.

National Fuel Gas Company, through its subsidiaries, operates as a diversified energy company primarily in the United States. The company operates through four segments: Utility, Pipeline and Storage, Exploration and Production, and Energy Marketing. The Utility segment sells natural gas or provides natural gas transportation services to approximately 727,000 customers in Buffalo, Niagara Falls, and Jamestown, New York; and Erie and Sharon, Pennsylvania. The Pipeline and Storage segment provides interstate natural gas transportation and storage services for affiliated and nonaffiliated companies through an integrated gas pipeline system; and 27 underground natural gas storage fields, as well as 4 other underground natural gas storage fields owned and operated jointly with other interstate gas pipeline companies. This segment also transports natural gas for industrial customers and power producers in New York State. It owns the Empire Pipeline, a 157-mile pipeline; and the Empire Connector, which is a 76-mile pipeline extension. The Exploration and Production segment engages in the exploration for, and the development and purchase of natural gas and oil reserves in California, in the Appalachian region of the United States, and in the Gulf Coast region of Texas and Louisiana. As of September 30, 2009, this segment had proved developed and undeveloped reserves of 46,587 thousand barrels of oil and 248,954 million cubic feet equivalent of natural gas. The Energy Marketing segment markets natural gas to industrial, wholesale, commercial, public authority, and residential customers primarily in western and central New York and northwestern Pennsylvania. National Fuel Gas company also develops and operates mid-range independent power production and landfill gas electric generation facilities. National Fuel Gas Company was founded in 1902 and is based in Williamsville, New York.

Northeast Utilities (NU) uses a little Yankee ingenuity (and a number of power generation plants) to keep its customers powered up. The largest utility in New England, NU supplies power to more than 2 million customers in Connecticut, New Hampshire, and Massachusetts through subsidiaries Connecticut Light and Power, Public Service Company of New Hampshire, and Western Massachusetts Electric. The company's power grid encompasses more than 3,100 circuit miles of overhead transmission lines and more than 32,800 pole miles of distribution lines. NU's Yankee Gas utility provides natural gas to 205,000 customers in Connecticut. In 2010 the company offered to buy regional rival NSTAR in for $4.2 billion.

ACEA S.p.A. municipal utility in Italy, it is also Italy's #1 water utility and a top electricity distributor. ACEA provides water to more than 7 million people and distributes power to more than 2.7 million homes and businesses in Rome and surrounding areas. In keeping with Europe-wide utility liberalization, the City of Rome has sold 49% of ACEA on the public market. The former monopoly has also built on Enel's Roman distribution assets, and through a joint venture with Electrabel, it has expanded into power generation, energy marketing, and natural gas distribution. ACEA also has international utility interests.

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