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.

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.

Enel S.p.A. owns and operates more than 70 renewable energy plants in 20 states and two Canadian provinces. Enel North America's plants have a capacity to generate 748.5 MW of power (406 MW of wind power, 314 MW of hydropower, 21 MW of biomass power and 7.5 MW of geothermal power). Its wind farms use Vestas and GE Energy turbines; its largest project, the Smoky Hill Wind Farm in Kansas, has 155 wind turbines that alone generate 250 MW of power (enough to power 85,000 homes for a year). Enel North America's only biomass plant is located in Quebec, where it offsets 1 million tons of carbon dioxide by burning wood waste each year.

Companhia de Saneamento de Minas Gerais provides water supply (for about 12 million people) and sewage treatment services in more than 600 municipalities in the country's state of Minas Gerais. Founded in 1963, COPASA serves customers such as private companies, government agencies, and individuals. The government of Minas Gerais established the company under the name Companhia Mineira de Água e Esgotos in order to enforce the sanitation policy for the state. COPASA receives payment for its services in the form a tariff, which takes into account customers' consumption ranges, as well as inflation.

Bonneville Power Administration (BPA) keeps the lights on in the Pacific Northwest. The US Department of Energy power marketing agency operates a transmission grid (with more than 15,000 miles of high-voltage lines) that delivers about 35% of the electrical power consumed in the region. The electricity that BPA wholesales is generated primarily by 31 federal hydroelectric plants and one private nuclear facility. BPA also purchases power from other hydroelectric, gas-fired, and wind and solar generation facilities in North America. Founded in 1937, BPA sells power to more than 140 primary customers, mainly public and investor-owned utilities in the Pacific Northwest.

Alpheus Environmental finds answers in a range of environmental-related services: water and wastewater treatment, operations and maintenance, infrastructure management and contracting, waste management and recycling, and technical support. A unit of water utility group AWG (formerly Anglian Water), it offers design, build, and project management services for blue-chip companies in the process industry. Services include installing water, gas, electricity, roads, and sewers on development sites. Customers include TOTAL, Whitbread, and the Derby City Council. Alpheus Environmental manages water management, waste minimization, and recycling sites across the UK.

Chesapeake Utilities Corporation, through its subsidiaries, operates as a diversified utility company that primarily engages in regulated energy and unregulated energy businesses. The company’s Regulated Energy segment provides natural gas distribution services in Delaware, Maryland, and Florida; and electric distribution services in Florida to residential, commercial, and industrial customers, as well as offers natural gas transmission services primarily to other utilities and industrial customers in Delaware, Maryland, Pennsylvania, and Florida. Its Unregulated Energy segment sells natural gas to commercial and industrial customers in Florida, Delaware, and Maryland; and distributes propane in Delaware, the Eastern Shore of Maryland and Virginia, southeastern Pennsylvania, and Florida.This segment also markets propane to wholesale customers, including independent oil and petrochemical companies, resellers, and propane distribution companies in the southeastern United States. As of December 31, 2009, the company distributed natural gas to approximately 118,000 customers; electricity to approximately 31,000 customers; and propane to approximately to 49,000 customers. It also operated a 384-mile interstate natural gas transmission pipeline. In addition, the company engages in non-energy operations, which include the provision of information-technology-related business services and solutions for enterprise and e-business applications in the United States and internationally. Chesapeake Utilities Corporation was founded in 1859 and is based in Dover, Delaware.

Suffolk County Water Authority provides water services to 375,600 homes and businesses (more than 1.2 million people) in New York's Suffolk County, on the eastern end of Long Island. The water authority's system (the largest water system in the nation operating entirely with groundwater) includes more than 5,500 miles of mains. The authority also runs the largest groundwater testing facility in the US. Suffolk County Water Authority is a public benefit corporation of the state of New York.

Although The Peoples Natural Gas Company brings the power of natural gas to the people of the Keystone state. The company, which operates as Dominion Peoples, serves about 359,000 commercial, industrial, residential, and transportation natural gas customers in 16 counties in southwestern Pennsylvania. By purchasing methane gas in Pennsylvania, the company keeps costs down by eliminating out-of-state transportation expenses. The gas utility was a division of Dominion Delivery, the gas and electric distribution and retail energy marketing unit of Dominion Resources. In 2010 Dominion Resources sold Peoples Natural Gas to a unit of investment firm SteelRiver Infrastructure.

Cobb Electric Membership Corporation (Cobb EMC) makes sure that Cobb County, Georgia residents can cook corn on the cob (and anything else) using electric power and natural gas. The utility distributes electricity to about 196,000 residential, commercial, and industrial customers in Cobb County and four other north metro Atlanta counties. Cobb EMC operates about 10,400 miles of power lines. Its Cobb Energy Management unit is a for-profit affiliate that provides administrative and labor services to Cobb EMC and offers phone, Internet, and natural gas options for Cobb EMC's customers primarily through subsidiaries.

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