Huntsville, Alabama residents don't have to hunt far to find gas, power, and water. Government's utility City of Huntsville Electric, Natural Gas and Water Systems provides all of these resources. Known as Huntsville Utilities, the company distributes electricity to more than 156.000 residential, commercial, and industrial customers in the city and surrounding areas; it also provides natural gas to 46,200 customers and water services to more than 82,000 customers. Huntsville Utilities buys electricity from the Tennessee Valley Authority. The utility's gas comes from Gulf of Mexico suppliers, and its water is pumped from underground aquifers and the Tennessee River.

Companhia de Saneamento de Minas Gerais provides water supply (for about 12 million people) and sewage treatment services in more than 600 municipalities in the country's state of Minas Gerais. Founded in 1963, COPASA serves customers such as private companies, government agencies, and individuals. The government of Minas Gerais established the company under the name Companhia Mineira de Água e Esgotos in order to enforce the sanitation policy for the state. COPASA receives payment for its services in the form a tariff, which takes into account customers' consumption ranges, as well as inflation.

Pennsylvania-American Water Company distributes water and provides wastewater services to a population of more than 2 million people in more than 370 communities across Pennsylvania. Pennsylvania-American Water also operates some 35 water treatment plants, seven wastewater facilities, and 9,900 miles of pipeline. The company's service territory covers some 35 Pennsylvania counties. Pennsylvania-American Water, the largest regulated water and wastewater service provider in Pennsylvania, is a subsidiary of the New Jersey-based American Water.

Northwest Natural Gas Company stores and distributes natural gas in Oregon, Washington, and California. The company operates in two segments, Local Gas Distribution and Gas Storage. The Local Gas Distribution segment distributes natural gas in Oregon and southwest Washington. This segment engages in building and maintaining pipeline distribution system, purchasing gas from producers and marketers, contracting for the transportation of gas over pipelines from the supply basins to service territory, and reselling the gas to customers. It also transports gas owned by customers from the interstate pipeline connection, or city gate, to the customers’ facilities. This segment serves various industries, including pulp, paper, and other forest products; companies manufacturing electronic, electrochemical, and electrometallurgical products; companies engaged in processing of farm and food products; metal fabrication and casting companies; organizations that produce various mineral products, machine tools, machinery, and textiles; companies that manufacture asphalt, concrete, and rubber; printing and publishing companies; nurseries; government and educational institutions; and electric generation companies. As of December 31, 2009, it served approximately 668,000 total utility customers comprising approximately 605,000 residential, 62,000 commercial, and 1,000 industrial sales and transportation customers. The Gas Storage segment offers underground natural gas storage services to interstate and intrastate customers in the Pacific Northwest. It holds interests in approximately 8,500 net acres of underground natural gas storage in Oregon and approximately 1,900 net acres of underground natural gas storage in California; and interests in approximately 1,600 net acres of oil and gas leases in Oregon. This segment serves primarily natural gas distribution, electric generation, and energy marketing companies. Northwest Natural Gas Company was founded in 1910 and is headquartered in Portland, Oregon.

Puerto Rico Electric Power Authority (PREPA) is prepared to serve an entire island nation. Founded in 1941, the government-owned utility is the sole electricity distributor for Puerto Rico, where it serves approximately 1.4 million residential and business customers. PREPA owns five primarily fossil-fueled power plants that give it nearly 5,800 MW of generating capacity, and it has more than 30,000 miles of transmission and distribution lines. In order to keep up with increasing demand, the Puerto Rican government has allowed independent power producers to build cogeneration plants on the island to sell power to PREPA.

EcoWater Systems is in a pristine spot. The company manufactures commercial and residential water treatment systems. It sells its products through a network of more than 1,400 dealers, wholesalers, and private-label retailers. Products include water refiners, conditioners, and purifiers, and innovations such as reverse osmosis drinking water systems. Founded in 1925, EcoWater Systems is a member of Berkshire Hathaway's Marmon Group and maintains its autonomous management. In addition to the US, the company operates in Canada, the UK, Europe, and China.

Modesty notwithstanding, Modesto Irrigation District (MID) does much more than irrigate 59,000 acres of land in the Modesto, California area. The state-owned utility also generates, transmits, and distributes electricity to more than 91,270 residential and about 12,700 commercial and industrial customers; markets wholesale power; and treats and provides drinking water to the city of Modesto for distribution purposes. The company is a not-for-profit organization formed by the government of Stanislaus County in 1887 to provide irrigation services in the Modesto region.

National Fuel Gas Company, through its subsidiaries, operates as a diversified energy company primarily in the United States. The company operates through four segments: Utility, Pipeline and Storage, Exploration and Production, and Energy Marketing. The Utility segment sells natural gas or provides natural gas transportation services to approximately 727,000 customers in Buffalo, Niagara Falls, and Jamestown, New York; and Erie and Sharon, Pennsylvania. The Pipeline and Storage segment provides interstate natural gas transportation and storage services for affiliated and nonaffiliated companies through an integrated gas pipeline system; and 27 underground natural gas storage fields, as well as 4 other underground natural gas storage fields owned and operated jointly with other interstate gas pipeline companies. This segment also transports natural gas for industrial customers and power producers in New York State. It owns the Empire Pipeline, a 157-mile pipeline; and the Empire Connector, which is a 76-mile pipeline extension. The Exploration and Production segment engages in the exploration for, and the development and purchase of natural gas and oil reserves in California, in the Appalachian region of the United States, and in the Gulf Coast region of Texas and Louisiana. As of September 30, 2009, this segment had proved developed and undeveloped reserves of 46,587 thousand barrels of oil and 248,954 million cubic feet equivalent of natural gas. The Energy Marketing segment markets natural gas to industrial, wholesale, commercial, public authority, and residential customers primarily in western and central New York and northwestern Pennsylvania. National Fuel Gas company also develops and operates mid-range independent power production and landfill gas electric generation facilities. National Fuel Gas Company was founded in 1902 and is based in Williamsville, New York.

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.

Beacon Power Corporation designs, develops, and commercializes advanced products and services to support stable and reliable electricity grid operation in North America. The company primarily focuses on commercializing its patented flywheel energy storage technology for storing and transmitting kinetic energy. It provides Smart Energy Matrix, a non-polluting, megawatt-level, and utility-grade flywheel-based energy storage system that provides sustainable frequency regulation services. The company’s energy storage and power conversion solutions provide electric power for the utility, renewable energy, and distributed generation markets. Beacon Power Corporation was founded in 1997 and is headquartered in Tyngsboro, Massachusetts.

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