Energieversorgung Weser-Ems (EWE) is a German powerhouse. Operating through some 30 subsidiaries and associated companies, EWE is a multi-service energy company primarily involved in distributing natural gas and electricity. In the past few years, however, EWE has expanded its activities to include telecommunications and information technology. EWE is Germany's fifth-largest energy company, serving more than one million electricity customers and providing about 770,000 customers with natural gas. Subsidiary EWE NaturWatt sells electricity exclusively from renewable sources. In 2008, German electricity distributor EnBW agreed to buy 26% of EWE for just more than $3 billion.

Steril-Aire lets you breathe easy. The company's products use ultraviolet "C" wavelength (UVC) energy to destroy molds and infectious diseases in HVAC systems. Steril-Aire makes and markets a wide range of UVC devices and accessories for commercial, residential, school, food processing, health care, and industrial applications. The company has an extensive portfolio of patents covering many aspects of UVC germicidal technology. Some products are designed for outdoor installation, and are water resistant. All others are designed for 99% relative humidity and function properly under those conditions.

Southwest Louisiana Electric Membership Corporation (SLEMCO) is no slowpoke when it comes to serving more than 93,400 power customers in eight Louisiana parishes. SLEMCO provides regulated power transmission and distribution services via 9,000 miles of power lines to its residential, commercial, and industrial members. It also provides energy conservation and street and security lighting services. SLEMCO extended assistance to help repair the badly damaged infrastructure in parishes from New Orleans to the Mississippi border following the devastation caused by Hurricane Katrina.

First Wind, wind is the first and last item in its business model. The vertically integrated energy company (formerly UPC Wind) develops, owns, and operates wind energy plants in the Northeastern and Western US, and Hawaii. Its six projects in Hawaii, Maine, Vermont, New York, and Utah generate more than 500 MW of electricity. First Wind, which targets states with high energy prices, renewable energy requirements, and favorable wind conditions, plans to have more than 2,000 MW of capacity by the end 2014. The company was formed in 2002 by individuals experienced with building wind power plants in Italy. In 2010 First Wind began construction of its 102 MW Utah-based Milford Wind project.

Detroit Edison generates and distributes electricity to 2.1 million customers in Michigan. The utility, a unit of regional power player DTE Energy, has more than 11,080 MW of generating capacity from its interests in nfossil-fueled, nuclear, and hydroelectric power plants. It operates more than 44,000 circuit miles of distribution lines and owns and operates about 680 distribution substations. Detroit Edison also sells excess power to wholesale customers and provides coal transportation services.

The Electric Power Board of the Metropolitan Government of Nashville and Davidson County is a mouthful. Its operating name, Nashville Electric Service (NES), sounds much better. And talking of sound, the legendary "Nashville Sound" would be hard to hear without the resources of this power distributor, which serves more than 357,000 customers in central Tennessee. NES is one of the largest government-owned utilities in the US, and operates more than 90,500 distribution transformers and about 230 substations. The company is required to purchase all its power from another government-owned operator, the Tennessee Valley Authority (TVA).

Los Angeles Department of Water and Power (LADWP) keeps the movie cameras running and the swimming pools full. The largest municipally owned utility in the US, LADWP provides electricity to more than 1.4 million residential and business customers and water to 640,000 customers. The company has power plant interests that give it more than 7,220 MW of generating capacity; it also buys and sells wholesale power. Most of the city's water supply is transported through two aqueduct systems from the Sierra Nevada Mountains; other water sources include wells and local groundwater basins. Because LADWP is city-owned, its retail monopoly status was unaffected by utility deregulation in California.

Exelon Corporation company distributes electricity to 5.4 million customers in northern Illinois (including Chicago) and southeastern Pennsylvania (including Philadelphia) through subsidiaries Commonwealth Edison (ComEd) and PECO Energy. PECO also distributes natural gas to 485,000 customers. Subsidiary Exelon Generation holds the company's power plants, whose production capacity is just about 25,000 MW. About two-thirds of Generation's power is nuclear. Exelon Power Team is a top wholesale energy marketer, and Exelon Energy markets retail power and offers other energy-related services.

Zephyr Environmental provides consulting, training, and data systems services relating to such areas as air quality, water quality, business protection programs, environmental health and safety, risk management, waste management, and regulatory tracking. The company has undertaken projects for clients in North and South America, Europe, the Middle East, and the Asia/Pacific region. Customers have included oil and gas companies, as well as companies in the cement manufacturing, chemical, pharmaceutical, and semiconductor industries. Zephyr Environmental operates from offices in Texas (Austin and Houston) and in Maryland. It also maintains an office in Dubai.

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.

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