A2A S.p.A. municipal multi-utility supplies electricity, natural gas, and water and wastewater services to customers, mostly in the province of Milan. A2A's units operate power-generation plants with some 3,700 MW of capacity),. The company distributes electricity and natural gas to regulated customers, and wholesale electricity and gas to buyers. It also owns a fiber-optic network that covers the city. A2A is also a leading environmental service company, treating some 2.9 million tonnes of waste material.

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.

Summerleaze has blown through a number of businesses -- aggregates, waste disposal, and renewable energy. The family-owned company, originally in the gravels/aggregates business, branched into using methane gas from the waste disposal landfills to make fuel. After acquiring renewable energy firm Thomas Graveson, it created Summerleaze RE-Generation, which has enough capacity (43 MW) to serve 70,000 houses from sites across the UK. Ennate Technology provides power generation equipment sales, maintenance, and hire services; its Green Hydrogen subsidiary supplies renewable hydrogen and oxygen for clients. Summerleaze also has a biogas unit, Summerleaze AnDigestion.

Cambridge Water distributes water to about 125,000 residential customers and business customers in the greater Cambridge area. Overall, the company serves a population of about 300,000. Cambridge Water maintains some 2,140 km of water mains and 34 storage towers and reservoirs. All the water supplied to customers is pumped from 25 underground sources. About 55% of water billed is charged by meter. The company offers its clients the delivery of emergency bottled water; customers pre-order water that Cambridge Water will deliver in the event of a major incident. The company is controlled by Cheung Kong Infrastructure Holdings.

Organic Resource Management (formerly National Challenge Systems) has an organic approach to the disposal of waste material across Canada. Providing non-hazardous and organic waste disposal services, Organic Resource Management's services include cleaning catch basins, drains, grease-traps, and sewers; food-waste recycling; and raw material and product destruction. Organic Resource Management serves more than 8,000 commercial, industrial, institutional, and residential customers in British Columbia, Ontario, and Quebec. In 2008 it sold the non-core assets of non-hazardous liquid waste subsidiary A&A Anderson Tank Services to McRae's Environmental Services.

TransAlta has transformed itself from one of Canada's largest electric utilities into a global independent power producer with assets in Australia, Canada, and the US. The company has about about 8,990 MW of operational generating capacity. It trades and markets electricity and gas in Canada and the US. Most of TransAlta's generating capacity is coal-fired; the rest comes from gas-fired, hydroelectric, and alternative-energy plants. TransAlta has sold its regulated distribution and transmission businesses to focus on power generation and marketing, primarily to industrial and wholesale customers. The company has more than 80 power plants in Australia, Canada, and the US.

Macao Water Supply Co. Ltd,the utility supplies its customers with water from the West River's Modaomen Channel in Zhuhai City. Because of the high salinity content in the water (especially in the winter and spring months), Macao Water Supply uses a system of holding tanks and purification stations. Founded in 1932, the company is a subsidiary of Sino-French Holdings (Hong Kong) Limited (a joint venture of France-based water utility Ondeo Services and Hong Kong-based NWS Holdings Limited). As part of an ongoing maintenance strategy the company has replaced or repaired all of the distribution network that was in place in 1982.

RainSoft (a division of Aquion Water Treatment Products) wants to clear up the water in your home or office. Through its division, the company makes residential and commercial water treatment equipment. Products include whole-house water conditioning systems, drinking water systems, and filters designed to remove particular contaminants that detract from water's taste and odor. RainSoft's products are distributed through a network of about 300 independent dealers in the US and in 24 countries in Asia, Europe, and the Middle East. Clients have included Allstate , Dow Chemical, Ford Motor, Holiday Inn, and Underwriters Laboratories.

Alpiq (formerly Aare-Tessin Ltd. for Electricity, or Atel) is the largest supplier of electricity in Switzerland. It generates electricity by means of hydro, nuclear, and coal power, then trades and distributes it through its transmission grid across Switzerland and 28 other European countries. Its main markets include Italy, Germany, France, and countries in Central and Eastern Europe. Alpiq has 5,270 MW of generating capacity. The company also provides energy services including engineering, construction, and maintenance. Atel merged with fellow Swiss energy company EOS Holding in 2009 and became Alpiq. EOS owns 31% of the company; French energy giant EDF, 25%.

UIL Holdings, parent of electric utility The United Illuminating Company (UI), hopes its well regulated business will result in regular revenue growth. The public utility distributes electricity to 325,000 customers in southwestern Connecticut. Its service area, largely urban and suburban, includes the principal cities of Bridgeport (population 137,000) and New Haven (population 124,000) and their surrounding areas. UIL Holdings has teamed up with NRG Energy to form GenConn Energy LLC, a joint venture that focuses on developing new power generation facilities in Connecticut. In 2010 the company acquired three gas utilies in New England from IBERDROLA USA for $1.3 billion.

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