Not-for-profit holding company Glas Cymru owns Dwr Cymru Welsh Water, one of the largest regulated water and sewerage companies in the UK. Welsh Water distributes water and provides wastewater services to 1.3 million household customers and more than 100,00 business customers in Wales and England. It has a network of about 560 service reservoirs. The company supplies 850 million liters of drinking water daily through its 27,000-km network of water mains. Its sewer system includes 19,000-km of sewers and more than 800 wastewater-treatment works. Formed in 2000, Glas Cymru bought Welsh Water from Western Power Distribution in 2001. Western Power Distribution had acquired Hyder, Welsh Water's parent, in 2000.

Seprotech Systems gets the salt out of old salts' drinking water. Designing, manufacturing, and producing water and wastewater treatment systems, Seprotech Systems serves a variety of markets, including industry, the military, municipalities, property development, and mining. Among its projects has been the repair and overhaul of shipboard reverse osmosis desalination units for the Canadian Navy. Seprotech Systems' Clementine transportable, containerized wastewater treatment plant is useful for mining camps, foreign-aid missions, and other remote work sites. It also has a water utilities unit, formed after the 2009 acquisition of Envirosearch. Seprotech Systems was founded in 1985.

Tokyo Electric Power Company (TEPCO), which supplies power to a population of 44 million customers in Tokyo, Yokohama, and the rest of the Kanto region. One of the world's largest electric utilities, TEPCO's 190 power plants have the generating capacity of approximately 64,000 MW, primarily produced by thermal, nuclear, and hydroelectric power sources. Through interests in telecom businesses, the company offers telephony and Internet services; it also has international consulting and power generation operations. Other businesses include construction, real estate, and transportation companies. It also invests in independent power producers in other countries.

City of Tacoma Department of Public Utilities was fated to fulfill the electric and water desires of the City of Destiny's dwellers. The municipal utility's Tacoma Power unit generates, transmits, and distributes electricity to more than 166,000 homes and businesses in Tacoma, Washington. Tacoma Water serves about 96,000 customers; the division's water supply comes from wells and the Green River Watershed. Tacoma Public Utilities also oversees Tacoma Rail, a freight-switching railroad with some 200 miles of track, and the Click! Network, a high-speed data network that uses fiber-optic cable.

Caithness Corp., which develops wind and other renewable power plants in the US under the Caithness Energy brand. Although the firm has focused on the development, acquisition, operation, and management of geothermal, hydroelectric, wind, and solar energy power projects, it also develops environmentally friendly fossil-fueled plants. Caithness is one of the largest producers of renewable energy in the US, and has developed more than 350 MW of geothermal projects, 160 MW of solar plants, and 440 MW produced by wind turbines. On the cleaner fossil fuel plant side it has also developed more than 2,000 MW of gas-turbine powered capacity.

The Laclede Group, Inc. operates as a public utility holding company. The company’s principal subsidiary, Laclede Gas Company, provides natural gas service to approximately 630,000 residential, commercial, and industrial customers in metropolitan St. Louis and surrounding counties in eastern Missouri. Its primary non-regulated subsidiary, Laclede Energy Resources, Inc., markets natural gas and related services to on-system utility transportation customers and customers outside of its utility’s traditional service area. The Laclede Group company was founded in 1857 and is based in St. Louis, Missouri.

The Jersey Electricity Company is the sole distributor of electricity services to Jersey, the largest of the Channel Islands. The company's services include electricity supply and a range of building services (mechanical, plumbing, design, air-conditioning, facilities management). It also offers equipment, including space and water heaters, heat pumps, and air-conditioning and refrigeration units. It sells retail appliances through its Powerhouse store. The company has diversified into mobile phones and computers but has sold its JET telecommunications business. Jersey's government controls the utility.

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.

Global Water Resources (GWRI) took the phrase "Think globally, act locally" to heart. The company provides water, wastewater, and recycled water utility services to 14 utilities and more than 60,000 people in its service area around Phoenix. Its recycled water is treated and purified wastewater used for non-potable and outdoor purposes, sent through a separate system of pipes than drinking water. GWRI says its reclaimed water project saves up to 40% of drought-prone Arizona's scarce groundwater. The utility also extends water and wastewater infrastructure financing to regional developers and builders. The company was formed in 2003. Once privately held, GWRI went public in an IPO in late 2010.

MMC likes to be m-m-good at what it does. MMC Corporation Berhad concentrates on transport and logistics, energy and utilities, and engineering and construction. Many of its operating companies are the largest or only players in their markets. Its key components are Pelabuhan Tanjung Pelepas (shipping container port), Malakoff (power production), Johor Port (the leading multi-purpose port in Malaysia), and Gas Malaysia (sole non-industrial natural gas supplier in Malaysia). MMC is also involved in flood mitigation, traffic management, and power plant construction projects (through Zelan Construction).

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