Keeping a sharp eye out for the well-being of Iowa's citizens, Central Iowa Power Cooperative provides electricity transmission and generation services to 13 member distribution cooperatives (12 rural electric cooperatives and one municipal cooperative), which in turn serve about 320,000 residential and 7,000 industrial and commercial customers. Central Iowa Power's member distribution cooperatives deliver power to commercial businesses, farmsteads, industrial parks, manufacturers, urban residences, and other customers, in a service area that stretches 300 miles diagonally across the state from Shenandoah in the southwest to the Mississippi River in the east.

Integrys Energy Group, Inc., through its subsidiaries, operates as a regulated electric and natural gas utility company in the United States and Canada. It provides natural gas utility services in Chicago, Wisconsin, Michigan, and Minnesota. As of December 31, 2009, Integrys Energy Group, Inc. served approximately 1,669,000 residential, commercial and industrial, transportation, and other customers. It had approximately 22,000 miles of natural gas distribution mains; and approximately 1,010 miles of natural gas transmission mains. The company also generates and distributes electric energy form coal, natural gas, fuel oil, hydroelectric, and wind resources in Wisconsin and Michigan. It served approximately 489,000 residential, commercial and industrial, wholesale, and other customers. In addition, Integrys Energy offers nonregulated energy supply and services; and electric transmission services. Integrys Energy Group, Inc. was formerly known as WPS Resources Corporation and changed its name to Integrys Energy Group, Inc. in February 2007. Integrys Energy Group, Inc. was founded in 1883 and is based in Chicago, Illinois.

Trojan Technologies wants to zap you. The company manufactures ultraviolet (UV) lighting systems for disinfecting wastewater and treating contaminated soil and groundwater. Trojan's wastewater treatment systems are used in about 4,000 municipalities in 50-plus countries. The company's UV light systems work by altering the DNA in microorganisms and are an alternative to traditional chlorine-based disinfection systems. Trojan also makes UV products that cleanse water used in industrial processes such as food production and electronics manufacturing. Other products include residential UV systems for drinking water. Danaher controls Trojan.

Pepco Holdings has more power than any politician in the populace of the US capital. The holding company distributes electricity and natural gas through its Potomac Electric Power (Pepco), Delmarva Power & Light, and Atlantic City Electric utilities to about 1.9 million customers in Delaware, Maryland, New Jersey, and Washington, DC. Nonregulated operations include independent power production, wholesale and retail energy marketing, and energy management services, through the company's Pepco Energy Services units.

New Hampshire warm in winter, but New Hampshire Electric Cooperative will. The utility provides electricity to about 80,000 residential and business customers (who are also member-owners of the cooperative) in 115 New Hampshire towns and cities. The enterprise operates 5,400 miles of distribution lines, and is seeking to become a complete energy solutions organization, offering energy saving options such as equipment retrofits at local schools and selling energy-efficient compact fluorescent light bulbs. Most of New Hampshire Electric Cooperative's revenues comes from residential customers, and the balance form small businesses.

Public Utility District No. 1 of Cowlitz County, Washington (or Cowlitz County Public Utility District), a Depression era institution that provides electric utility services to 47,400 customers (including 42,400 residential customers and 5,200 commercial clients) in its service territory. The municipal utility also serves more than 3,800 Longview-Kelso area water utility customers. Like 27 other PUDs in Washington state, Cowlitz County Public Utility District has the authority to offer electric, water, wastewater, and wholesale telecommunication service.

Utilities' formula for success is H-2-O. As one of the largest privately owned water and wastewater companies in the US, Utilities owns about 90 subsidiaries that operate more than 500 systems in 15 states, mainly east of the Mississippi. The company serves more than 300,000 customers. About half of the company's revenues come from water services and the other half from wastewater services; residential customers account for approximately 90% of sales. Utilities also provides reuse water for irrigation purposes and for golf courses and car washes. Expanding its coverage, in 2009 the company acquired the sewer collection system assets of Sewerage District No. 6 in Louisiana.

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.

South East Water distributes water to some 2.1 million people in England's South East region. The company provides 565 million liters of drinking water daily. Its service territory includes Berkshire, Hampshire, Kent, Sussex, and Surrey, and its Dynamco unit provides engineering services for water companies. The company offers customers its E-metering service, an online application enabling customers to track and view the status of their water consumption; it also conducts water efficiency audits for its customers. In 2006 South East Water, formerly owned by Australia's Macquarie Bank, was bought by Hastings Diversified Utilities Fund, and Utilities Trust of Australia. It acquired Mid Kent Water in 2007.

ThermoEnergy Corporation, a clean technologies company, develops municipal and industrial wastewater treatment systems, and carbon reducing clean energy technologies worldwide. The company's technologies include Zero Emission Boiler system, which converts fossil fuels and biomass into electricity without producing air emissions, as well as removes and captures carbon dioxide in liquid form for sequestration or beneficial reuse; and Controlled Atmosphere Separation Technology (CAST), R-CAST, and proprietary water technologies. Its technologies also comprise Ammonia Recovery Process technology that captures ammonia from dilute waste streams and converts it into ammonium sulfate; ThermoFuel Process, a renewable energy process, which converts digested or waste activated sewage sludge into an energy fuel that could be converted into electricity for use on-site or sold as a feedstock to third party industrial clients; and Enhanced Biogas Production process, which retrofits existing wastewater treatment plants to recover excess ammonia from the digesters. The company's wastewater treatment systems are used in the aerospace, food and beverage processing, metal finishing, pulp and paper, petrochemical, refining, microchip and circuit board manufacturing, heavy manufacturing, and municipal wastewater applications. Thermoenergy Corporation has a strategic alliance with Contego Systems LLC to provide solutions for airplane deicing. The company was founded in 1988 and is headquartered in Little Rock, Arkansas.

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