American Transmission Company is an entrepreneur in the US power grid business. Connecting electricity producers to distributors, American Transmission owns, operates, monitors, and maintains 9,400 miles of high-voltage electric transmission lines and 510 substations in portions of Illinois, Michigan, Minnesota, and Wisconsin. American Transmission is one of the first for-profit transmission companies, formed when the US market deregulated in the early 2000s. The company operates the former transmission assets of some of its shareholders. About 30 utilities, municipalities, municipal electric companies, and electric cooperatives in its service area have an ownership stake in American Transmission.

ACEA S.p.A. municipal utility in Italy, it is also Italy's #1 water utility and a top electricity distributor. ACEA provides water to more than 7 million people and distributes power to more than 2.7 million homes and businesses in Rome and surrounding areas. In keeping with Europe-wide utility liberalization, the City of Rome has sold 49% of ACEA on the public market. The former monopoly has also built on Enel's Roman distribution assets, and through a joint venture with Electrabel, it has expanded into power generation, energy marketing, and natural gas distribution. ACEA also has international utility interests.

Energy Northwest provides electricity to public utility districts (PUDs) and municipalities in the northwestern US. The company, which is owned by the utilities it serves, has interests in nuclear, hydroelectric, wind, and solar power generation facilities. Energy Northwest is a joint operating agency comprised of about 30 member public utilities from across the state of Washington. Its four electricity generating stations are Columbia Generating Station, Nine Canyon Wind Project, Packwood Lake Hydroelectric Project, and the White Bluffs Solar Station. The company has a total generating capacity of 1,400 MW.

Ohio Pure Water distributes a wide range of water purification and treatment equipment to customers throughout the US. Its products include chlorination systems, water softeners, water filters, reverse-osmosis equipment, UV sterilizers, and drinking water systems. Other equipment includes flexible hose units, float switches and valves, PVC air injectors, and mineral tanks and parts. The company conducts most of its sales through its Web site. Ohio Pure Water was founded in 1996 by president C. K. Moore, a former maintenance superintendent for the State of Ohio.

Degremont designs, builds, and operates water treatment plants worldwide to purify water and treat wastewater. The company has operations in more than 70 countries, and its plants provide more than 1 billion people with potable water. It is a specialist in designing and constructing facilities for seawater desalination by the means of reverse osmosis. It also designs and builds sludge treatment facilities. In the US the group operates through subsidiary Infilco Degremont. United Water formed a joint venture with Infilco Degrement in 2009 to operate a Water Environmental Research Center in Richmond,Virginia.

Black Hills Power has been delivering energy for over 125 years. It was formed through the consolidation of several smaller electric suppliers in the Black Hills of South Dakota, Montana and Wyoming. Black Hills Power is an investor-owned utility and is part of the Black Hills Corporation family. The utility serves 63,500 customers in 20 communities located in Western South Dakota, Northern Wyoming, and Southeastern Montana.Our customers use 1,501,805,000 kilowatt hours (kWh) of electricity at an average price of $0.0714 per kWh. Cost containment efforts and customer load growth have provided our customers with stable residential electricity costs and our commercial electricity costs that are declining in real terms, and have remained stable for the last 11 years.

Otter Tail covers a swath of businesses, from electric services and food-ingredient processing to manufacturing equipment, plastics, and health services. Its electric utility and energy activities are subsidiaries of Otter Tail, and its subsidiary Varistar holds Otter Tail's other interests. The electric utility has been the company's core effort since Otter Tail's start in 1907; it keeps the lights on for 129,000-plus residential, commercial, and industrial customers in Minnesota and the Dakotas. Otter Tail also makes PVC pipes, wind towers, metal parts, and processes potato flakes, as well as offers diagnostic medical equipment, and construction and trucking services.

Portland General Electric (PGE) keeps many Birkenstock-shod feet warm: The company, formerly a subsidiary of Enron, generates, purchases, and distributes electricity to about 815,750 customers in Oregon. PGE's service territory covers 52 cities, including Portland and Salem. Its hydroelectric, coal-fired, and gas-fired plants had a generating capacity of more than 2,600 MW in 2009, and it purchased another 1,920 MW of generating capacity. PGE also markets wholesale electricity and natural gas to other utilities and marketers in the western US. In keeping with the "green" image of Portland residents, PGE leads the nation in residential customers who purchase power from renewable sources.

Sacramento Municipal Utility District (SMUD) doesn't want its name to be mud. One of the largest locally owned electric utilities in the US, SMUD serves about 592,000 residential and commercial customers in California's Sacramento and Placer counties. The utility generates half of its electricity (its 1,300-MW capacity is derived primarily from hydroelectric and cogeneration power plants) and buys the rest. SMUD also sells power to wholesale customers, and has one of the US's largest solar energy distribution systems. SMUD operates more than 10,200 miles of transmission and distibution lines across its 900-sq.-mi. service area.

Wolverine Power Supply Cooperative makes sure that that voracious consumer of electricity -- the American public -- gets the power its needs. The non-profit company is an electric generation and transmission utility that provides services to five member distribution cooperatives in Michigan. Wolverine Power Supply Cooperative monitors and operates 1,600 miles of bulk transmission lines and owns five power plants that generate 200 megawatts of capacity. It also maintains about 130 distribution substations and 36 transmission stations, as well as purchases power (including windpower energy) from other utilities and marketers to distribute to its customers.

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