Thames Water Holdings plc provides regulated water to 8.5 million customers and wastewater services to about 13.6 million people in London and the Thames Valley. It operates 100 water treatment plants, about 290 pumping stations, and 235 reservoirs. On the wastewater side of the business the company operates 43,500 miles of sewer lines and 350 wastewater treatment plants. In addition to its water and wastewater operations, Thames Water offers consulting, infrastructure, project management, engineering, and maintenance services. The company is controlled by Kemble Water Limited.

Volunteer Energy Cooperative is voluntarily cooperating with its members to serve their energy needs. The distribution utility serves more than 108,000 customers (who also own the cooperative) in 17 central and eastern Tennessee counties. It operates more than 8,400 miles of power lines. Volunteer Energy purchases its power supply from the Tennessee Valley Authority. The company also sells propane and provides telecommunications (Internet access and long-distance phone) services. In addition, Volunteer Energy offers its customer surge protection and security equipment.

Bluebonnet Electric Cooperative's mission is similar to the late Lady Bird Johnson's quest to spread wildflower seeds along Texas' highways -- the cooperative spreads currents of electricity among rural central Texas dwellers. One of the largest power distribution cooperatives in the state, Bluebonnet Electric serves almost 80,000 customers in 14 counties. The member-owned company, which was formed in 1939, operates approximately 11,000 miles of transmission and distribution lines, and 19 substations. It purchases its wholesale power supply at 21 Lower Colorado River Authority-owned substations.

Orival manufactures self-cleaning water filters, automatic water filters, and strainers for industrial and agricultural use as irrigation filters, cooling tower filters, industrial water filters, and HVAC filters. The company has installed units in more than 40 countries. Orival's products are flexible in design so that the company can cater to a wide range of customized orders and local requirements -- form single units, flange-to-flange systems, and complete skid mounted packages, to diverse construction standards, alternate flanges, and voltage standards.

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.

Pure water is the aim of water process engineering specialist Enpure. Enpure specializes in treating water, wastewater, and sludge for municipalities and businesses. Its services include process design and project management for water treatment facilities worldwide. There are more than 4,000 plants in 60 countries designed by Enpure. The company licenses the sonix ultrasound sewage treatment technology sold through Sonico, Enpure's joint venture with Atkins. It had been a part of the support services division of water utility AWG until its management (in partnership with Aberdeen Asset Management) bought out the company at the end of 2006. The company changed its name from PURAC at that time.

Vectren intends to inundate Indiana and Ohio with energy. Through its utility subsidiaries (Indiana Gas Company, Southern Indiana Gas and Electric, and Vectren Energy Delivery of Ohio), the company distributes natural gas to 995,000 business and residential customers in the two states. It also distributes electricity to 141,000 customers and has 1,425 MW of primarily coal-fired generating capacity in Indiana. Vectren's other nonregulated businesses include retail and wholesale energy marketing and management services, coal mining, synthetic fuels production, and utility infrastructure construction.

Veolia Environmental Services, a part of Veolia Environnment (France), is a leader in waste management in the UK. Through its various companies, Veolia Environmental Services provides waste collection, recycling, disposal, and environmental cleansing services to the public and private sectors. It operates a network of landfill sites, material recycling facilities, transfer stations, civic amenity sites, and Energy from Waste incineration plants. The company serves more than 16 million customers in more than 100 Local Authorities and has been active in the UK since 1990.

NSTAR is looking to outshine its rivals through the efficiency of its regulated electric and natural gas sales, distribution, and transmission operations. The utility holding company transmits and distributes electricity to almost 1.2 million homes and businesses through NSTAR Electric and serves some 300,000 natural gas customers in Massachusetts through NSTAR Gas. The company also markets wholesale electricity, and operates liquefied natural gas (LNG) processing and storage facilities. Its NSTAR Communications unit owns about 240 miles of fiber optic network. In 2010 the company agreed to be acquired by Northeast Utilities for about $4.2 billion.

STP Nuclear Operating Company (STPNOC) is pulling out all the stops to make sure that the lights burn brightly in the Lone Star State. The company manages the South Texas Project Electric Generating Station on a 12,220-acre site near Bay City, Texas. The nuclear power plant's two reactors, which went into operation in 1988 and in 1989, produce about 2,700 MW of electricity and serve 2 million homes in Texas. The company is jointly owned by NRG Energy (44%), CPS Energy (40%), and Austin Energy (16%). STPNOC accounts for about 7.5% of the power consumed in Texas.

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