Pennichuck Corporation, through its subsidiaries, engages in the collection, storage, treatment, and distribution of potable water for domestic, industrial, commercial, and fire protection service in New Hampshire and Massachusetts. The company also provides non-regulated water management services, including monitoring, maintenance, testing, and compliance reporting services for water systems of various towns, businesses, and residential communities. In addition, Pennichuck Corporation involves in real estate management and commercialization activities. The company was founded in 1852 and is headquartered in Merrimack, New Hampshire.

ReliOn relies on its ability to produce hydrogen fuel cells in order to make money. The company claims to be the world's leading developer and marketer of modular, cartridge-based, proton exchange membrane fuel cell technology. ReliOn markets a range of stationary fuel cells for emergency and back up power systems, uninterruptible power supplies, digital power needs and a range of off grid power requirements. The company has sold and installed more than 2 MW of products with private and public entities in the energy, telecommunications, and transportation segments. Investors include Avista, Enterprise Partners Venture Capital, and Wall Street Technology Partners.

Missouri Gas Energy delivers natural gas in the "Show-Me" state. The utility, an operating unit of national natural gas power player Southern Union, distributes natural gas to more than 500,000 customers in 155 cities and towns located in central and western Missouri. Its territory stretches from St. Joseph in the north to Joplin and neighboring areas in the south, and from the Kansas border east to Ozark (near Springfield). Missouri Gas Energy has facilities in St. Joseph, Lees Summit, Warrensburg, Joplin, Republic, Neosho, and Monett. The Missouri Public Service Commission oversees Missouri Gas Energy's operations.

Horizon Wind Energy owns and operates more than 20 onshore wind farms across nine states that have a generating capacity of 2,800 MW. It has another 20,000 MW of wind projects in various stages of development around the country. Horizon sells its electricity wholesale as Power Purchase Agreements (PPAs) to utility companies such as AmerenUE, Direct Energy, Great River, and the TVA. It has also developed and sold seven farms to Entergy, Florida Power & Light, and Puget Energy.

Water is delivered by Mediterranea delle Acque (formed by the early 2006 merger of Italian water utilities Ferrari -- Acquedotto De Ferrari Galliera, Acquedotto Nicolay, Acqua Italia, and Genova Acque. Prior to the merger Acquedotto De Ferrari Galliera delivered about 45 million cubic meters (1.5 billion cubic feet) of water annually to about 350,000 customers. The company is also is involved in firefighting services, electricity sales, and water well-drilling. Rome-based utility AMGA owns 68% of the company.

Siemens Water Technologies Corp. company is a leading producer of water- and wastewater-treatment equipment worldwide. Through its Water and Wastewater Systems and Water Services and Products groups, Siemens Water Technologies provides services to municipal, industrial, and institutional clients. It has more than 200,000 installations on several continents and a portfolio of more than 900 water treatment products and technologies. Among its other services are ion exchange resin recycling and thermal reactivation processes that reduce carbon expenditure. The company is a subsidiary of Siemens Industry.

ATCO operates worldwide in utilities, power generation, and related services. Majority-owned Canadian Utilities oversees most of the group's energy businesses, including ATCO Electric and ATCO Gas (transmission and distribution) and ATCO Power (generation). Other holdings include gas gatherer and processor ATCO Midstream, and gas transporter ATCO Pipelines. ATCO I-Tek provides IT, billing, and customer care services. ATCO Structures & Logistics manufactures modular buildings and provides logistical and noise abatement services. Utilities ATCO Electric (with nearly 207,000 customers) and ATCO Gas (with more than 1 million customers) account for the largest slice of ATCO's revenues.

Bournemouth and West Hampshire Water supplies water distribution and treatment services to commercial and residential customers. It serves a population of 436,300 in an area encompassing some 1,040 square kilometers. It operates 50 sites and has a 2,755-km network of water mains. The company also has nonregulated operations, including Aqua Care, which provides plumbing services and home emergency insurance. The utility is owned by Cascal BV, which itself is owned by UK water and wastewater treatment provider Biwater. The company was formed by the 1994 amalgamation of Bournemouth & District Water Co. and West Hampshire Water Co.

Veolia Environnement holds water -- as well as waste management, energy, and transportation -- operations. The company's Veolia Eau unit, which provides water and wastewater services to more than 80 million people in more than 60 countries, is the world's largest water company, ahead of SUEZ Environnement. Veolia Environmental Services, one of the world's leading waste management companies, serves more than 70 million people a year. Majority-owned energy unit Dalkia (Veolia Energy Services) operates global cogeneration facilities and heating and cooling systems, and Veolia Transport (formerly Connex) is a top European provider of bus, light-rail, and rail transport and operates in about 30 countries.

Let's cut right to the point: construction materials and mining used to be the lifeblood of Knife River Corporation, but in recent years, its energy and utility operations have grown to be the largest portion of its business. Oil and natural gas production, power transmission, pipelines and power utilities now dominate Knife River's balance sheet. But don't count out its construction services division, which continues to produce record earnings. Knife River has operations in Alaska, Hawaii, Oregon, California, Idaho, Minnesota, Montana, North Dakota, Oregon, Texas, and Wyoming. The company is a subsidiary of MDU Resources Group, Inc.

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