GenOn Energy, Inc. operates as a generator of wholesale electricity in the United States. Its portfolio of power generation facilities include baseload, intermediate, and peaking units using coal, natural gas, and oil to generate electricity. The company owns, contracts, or operates approximately 49 power generation stations with generation capacity of 24,599 megawatts. The company was formerly known as Mirant Corporation and changed its name to GenOn Energy, Inc. on December 4, 2010. The company is based in Houston, Texas.

Avista Corporation, an energy company, engages in the generation, transmission, and distribution of energy and energy-related businesses in the United States and Canada. The company operates through two segments, Avista Utilities and Advantage IQ. The Avista Utilities segment engages in the generation, transmission, and distribution of electric energy primarily from hydroelectric and thermal sources. This segment also distributes natural gas to retail customers in parts of eastern Washington, northern Idaho, and parts of northeast and southwest Oregon, as well as engages in wholesale purchase and sale of electricity and natural gas. As of December 31, 2009, it provided retail electric service to approximately 356,000 customers; and retail natural gas service to approximately 316,000 customers. This segment offers electricity and natural gas to residential, commercial, and industrial customers. The Advantage IQ segment provides utility expense management solutions to assess and manage utility costs and usage to multi-site companies in North America. It offers invoice processing, auditing and payment services, energy procurement, reporting, and advanced analysis, as well as provides analytical support, reporting, and consulting services. In addition, Avista’s other investments and operations include sheet metal fabrication of electronic enclosures, parts, and systems for the computer, telecom, renewable energy, and medical industries; real estate investments, primarily commercial office buildings; and investments in venture capital funds and low income housing. The company was founded in 1889 and is headquartered in Spokane, Washington.

Sharing power is not a threatening proposition for Southeastern Power Administration. The power distributor markets electricity generated at federal hydroelectric facilities (nearly 3,400 MW of capacity) to customers in Alabama, Florida, Georgia, Illinois, Kentucky, Mississippi, North Carolina, South Carolina, Tennessee, Virginia, and West Virginia. The company's 495 preference wholesale customers (who serve more than 13 million consumers) are primarily municipal and cooperative utilities in the region. Southeastern Power Administration is an agency of the US Department of Energy, and its goal is to market electric power generated by Federal reservoir projects at the lowest possible cost to consumers.

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.

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.

Dalkia doesn't balk when it comes to managing its clients' energy needs. The company's services include electricity, water, and natural gas procurement, energy efficiency consulting, electrical and mechanical contracting, building management control, and outsourced facilities maintenance. It installs onsite power generation, HVAC (heating, ventilation, and air conditioning), water treatment, fire protection, and lighting systems. The company serves manufacturers, offices, schools, hospitals, and other businesses. Its Sterience subsidiary sterilizes surgical instruments for hospitals.

Environmental, Safety & Health, Inc. (ES&H) will follow through. Serving US companies and government agencies, ES&H provides training and services for safety, health, environmental, and regulatory concerns. The company also offers general contractor services for construction, demolition, and remediation projects. Clients include corporations like Schering-Plough and Alcoa, as well as districts or regional divisions of government agencies like the FAA and US Army Corps of Engineers. Founded in 1997, ES&H is based in Tennessee and operates offices in Delaware and Louisiana.

The dryly named electric utility Electric Power Development Co. has a much more fun nickname -- J-POWER. With a generating capacity of 16,380 MW, the company supplies power used all over Japan. It has 67 hydroelectric plants, as well as some thermal and geothermal plants, and owns a transmission network that covers 2,400 km. J-POWER acts as a wholesale electric utility, selling to other electric power companies. Established by the Japanese government in 1952, J-POWER went through the privatization process, finally achieving full privatization and trading on the Tokyo Stock Exchange in 2004. The company is also sometimes referred to as EPDC.

San Jose Water, the primary subsidiary of SJW, provides water utility services to approximately 225,000 customers (about 1 million people) in California's Santa Clara County. To obtain its water supply, San Jose Water taps wells and surface sources and buys water from the Santa Clara Valley Water District. It also collects local mountain surface water from the watershed in the Santa Cruz Mountains, which is then treated at San Jose Water's two treatment plants. This local surface water accounts for about 7% of the water utility's total supply. Purchased water accounts for more than 40%.

Transportadora de Gas Del Sur S.A. engages in the transportation of natural gas, as well as production and commercialization of natural gas liquids primarily in Argentina. It operates approximately 8627 km long pipeline system. Transportadora company transports its natural gas to distribution companies, industries, traders, producers, and power plant operators. The company’s production and commercialization activities are conducted at the Cerri Complex located near Bahia Blanca. Its natural gas liquid products comprise ethane, propane, butane, and natural gasoline. It also provides midstream services, which consist of gas treatment, gas compression, and wellhead gas gathering services; removal services for impurities from the natural gas stream; and pipeline construction, operation, and maintenance services. In addition, the company offers telecommunication services for telephone operators and other corporate users. Its telecommunication network includes a microwave's digital system with synchronous digital hierarchy technology. Transportadora company was founded in 1992 and is based in Buenos Aires, Argentina. Transportadora de Gas Del Sur S.A. is a subsidiary of Compania de Inversiones de Energia S.A.

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