Viridian Group, through its main subsidiary, regulated regional electric company Northern Ireland Electricity (NIE), transmits and distributes power to about 793,000 homes and businesses in Northern Ireland. Its NIE Energy Supply unit is the regulated electricity supplier in Northern Ireland. Viridian is also involved in unregulated businesses, including retail power and natural gas marketing (Energia) and high-voltage electrical infrastructure contracting (Powerteam). It also participates in Ireland's electricity market through its Energia subsidiary, which deals in both retail and wholesale energy. In 2010 Irish power utility ESB Group acquired NIE from Viridian for $1 billion.

Empire District Electric (EDE) has the sovereign authority to light up its territory. The utility transmits and distributes electricity to a population base of more than 450,000 (or about 215,000 direct customers) in southwestern Missouri and adjacent areas of Arkansas, Kansas, and Oklahoma. It also supplies water to three Missouri towns and natural gas throughout most of the state. EDE's interests in fossil-fueled and hydroelectric power plants give it a generating capacity of 1,257 MW; it also buys and sells power on the wholesale market. In addition, the company is pursuing nonregulated opportunities such as leasing capacity on its fiber-optic network.

Otter Tail covers a swath of businesses, from electric services and food-ingredient processing to manufacturing equipment, plastics, and health services. Its electric utility and energy activities are subsidiaries of Otter Tail, and its subsidiary Varistar holds Otter Tail's other interests. The electric utility has been the company's core effort since Otter Tail's start in 1907; it keeps the lights on for 129,000-plus residential, commercial, and industrial customers in Minnesota and the Dakotas. Otter Tail also makes PVC pipes, wind towers, metal parts, and processes potato flakes, as well as offers diagnostic medical equipment, and construction and trucking services.

American Water Works Company, Inc. provides water and wastewater services to residential, commercial, and industrial customers in the United States and Canada. As of December 31, 2009, the company served approximately 16 million people with drinking water, wastewater, and other water-related services in 35 states and two Canadian provinces. It owned approximately 80 surface water treatment plants, 600 groundwater treatment plants, 1,200 groundwater wells, 50 wastewater treatment facilities, 1,200 treated water storage facilities, 1,200 pumping stations and 100 dams, and 49,000 miles of mains and collection pipes. American Water Works Company also enters into public/private partnerships, including operation and maintenance contracts; and design, build, and operate contracts for the provision of services to water and wastewater facilities for municipalities and the United States military. In addition, the company designs, builds, and operates smaller-scale water and wastewater treatment plants for real estate developers, industrial companies, and new or expanding communities; and provides services to domestic homeowners to protect against the cost of repairing broken or leaking pipes inside and outside their homes. Further, it provides granular activated carbon for water purification, and involves in the management and disposal of biosolids and wastewater by-products for municipal and industrial customers. The company was founded in 1886 and is based in Voorhees, New Jersey.

Bristol Water Group, one of the largest independent water suppliers in the UK. Through primary operating subsidiary Bristol Water plc, the group supplies water to about 500,800 customers, representing a population of more than 1.1 million. Bristol Water maintains about 6,600 km. of mains in a service territory that encompasses some 2,400 sq. km., and includes Bristol, Somerset, Gloucestershire, and Wiltshire. The group has completed its disposal of its nonregulated operations and is focusing on its core regulated water business.

GeoSyntec Consultants provides services such as environmental management, geotechnical engineering, groundwater assessment and remediation, pollution prevention, and surface water management. The company operates from more than 30 offices, primarily in the US but also in Canada, Malaysia, and the UK. Its clients include Aerojet-General, AstraZeneca, Chevron, Delta Air Lines, FMC Corp., Georgia Power, Kimberly-Clark, Lockheed Martin, Pharmacia & Upjohn, and Shell Oil. Expanding its services in the water and natural resources segment, in 2010 Geosyntec acquired Rainwater Recovery, which focuses on rainwater harvesting technology.

Guangzhou Development Industry helps keep the lights on in China's Pearl River Delta. Established in 1997, the company is the largest power producer in Guangzhou province, with stake in about 10 coal-fired power plants with 2,100 MW of generating capacity. Guangzhou's energy logistics division operates an 80,000-ton deep-water coal-loading terminal and a 340,000-ton coal storage field. Nansha Oil Terminal, its joint venture with BP, has expanded Guangzhou's oil products distribution services throughout the region. The company is also a shareholder in Guangzhou Northern No. 2 Ring Expressway, a key toll road operating in the Pearl River Delta

South West Water, one of the main subsidiaries of Pennon Group, provides water and wastewater services to 1.6 million people (more during the summer tourism season) in England's South West region. The company's service territory covers nearly 4,300 square miles and includes Devon, Cornwall, and parts of Dorset and Somerset. South West Water maintains more than 9,320 miles of water mains. Because 8 million tourists come to the region annually to swim at its numerous beaches, the utility is responsible for environmental cleanup in the region. It instituted a Clean Sweep program to improve the treatment of coastal sewage and meet European Union guidelines. The utility was privatized in 1989.

Allegheny Energy, Inc. owns and operates electric generation facilities, and delivers electric services to customers in Pennsylvania, West Virginia, Maryland, and Virginia. The company owns or contractually controls coal-, gas-, and oil-fired generation facilities, as well as hydro generation facilities. It operates in two segments, The Merchant Generation and The Regulated Operations. The Merchant Generation segment owns, operates, and manages electric generation facilities, as well as purchases and sells energy and energy-related commodities. This segment markets its electric generation capacity to various customers and markets, including certain of its affiliates, as well as uses both derivative and nonderivative contracts to manage its portfolio of contracts. As of December 31, 2009, it owned or contractually controlled 7,015 megawatts of generation capacity. The Regulated Operations segment operates electric public utility systems that include electricity generation, transmission, and distribution facilities. As of December 31, 2009, it owned or contractually controlled 2,741 megawatts of generation capacity. This segment served approximately 383,600 customers in northern West Virginia; approximately 483,400 customers in portions of West Virginia, Maryland, and Virginia; approximately 102,000 customers in northern Virginia; and approximately 714,900 customers in southwestern, south-central, and northern Pennsylvania. The company is headquartered in Greensburg, Pennsylvania.

AGL Resources Inc., an energy services holding company, distributes natural gas primarily in Florida, Georgia, Maryland, New Jersey, Tennessee, and Virginia. It operates in four segments: Distribution Operations, Retail Energy Operations, Wholesale Services, and Energy Investments. The Distribution Operations segment operates six natural gas distribution utilities that construct, manage, and maintain intrastate natural gas pipelines and distribution facilities. It operates approximately 46,000 miles of underground distribution and transmission mains. The Retail Energy Operations segment markets natural gas and related services under the Georgia Natural Gas name to retail customers on an unregulated basis primarily in Georgia, Ohio, and Florida, as well as to commercial and industrial customers principally in Alabama, Tennessee, North Carolina, South Carolina, and Georgia. The Wholesale Services segment involves in asset management and optimization, storage, transportation, production, and peaking services, as well as engages in wholesale marketing business.The Energy Investments segment develops, acquires, and operates salt-dome and other storage assets in the Gulf Coast region of the United States. It has approximately 7.5 billion cubic feet of liquefied natural gas (LNG) storage capacity in five LNG plants located in Georgia, New Jersey, and Tennessee, as well as owns three propane storage facilities in Virginia and Georgia. AGL Resources Inc. has a joint venture agreement with TECO Energy Inc. to provide home warranty products and services under the brand name UtiliPRO; and with El Paso Corp. to distribute liquefied natural gas (LNG) across the southeastern United States to the heavy-duty transportation market. AGL Resources Inc. was founded in 1856 and is based in Atlanta, Georgia.

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