Southern Californians soak up the sun, and the energy. The latter is where Southern California Public Power Authority comes in. The power authority generates and transmits electricity for 10 municipal distribution utilities and one irrigation district in southwestern California. Members include the municipal utilities of the cities Anaheim, Burbank, Colton, Glendale, Los Angeles, Pasadena, and Riverside. The authority has interests in three power plants and three transmission projects in the western US. It is constructing a fourth generation project. Southern California Public Power Authority also provides legislative representation and cost efficiency services to its members.

Trojan Technologies wants to zap you. The company manufactures ultraviolet (UV) lighting systems for disinfecting wastewater and treating contaminated soil and groundwater. Trojan's wastewater treatment systems are used in about 4,000 municipalities in 50-plus countries. The company's UV light systems work by altering the DNA in microorganisms and are an alternative to traditional chlorine-based disinfection systems. Trojan also makes UV products that cleanse water used in industrial processes such as food production and electronics manufacturing. Other products include residential UV systems for drinking water. Danaher controls Trojan.

Pall Aeropower, a subsidiary of filtration products maker Pall, manufactures filtration equipment for use in the aerospace and defense industries, as well as for general industrial applications. The company's products are used in aircraft cabin air filtration, fixed wing and rotary wing aircraft, marine vessels, military land vehicles, and space vehicles. Its Portable Fluid Purifier automatically removes water, gases, solvents and particulate matter from coolants, hydraulic and lubrication fluids, and other liquids. The unit sells directly to customers in most of its markets, though Danish company Satair distributes to commercial airlines. Pall Aeropower is part of its parent's industrial business segment.

Empresa Energetica de Mato Grosso Sul, or Enersul, brings electricity to the farmers and ranchers of Brazil's state of Mato Grosso do Sul. Cattle ranching and other crop cultivation (sugarcane, wheat, soybeans) are the region's main industries and the company's biggest customers. Enersul distributes 1.4 million megawatts of electricity to about 640,000 residential, industrial, and commercial customers via more than 70 municipalities across the state. It generates a small percentage of its power but most comes from Eletrosul parent ELETROBRAS and other sources. Enersul is owned by Energias do Brasil, which is controlled by EDP - - Energias de Portugal.

Wheelabrator Technologies is on a roll. A subsidiary of solid-waste processing giant Waste Management, the company operates municipal-waste incinerators and trash-to-steam plants that convert 7 million tons of municipal solid waste annually into energy. Wheelabrator operates 16 waste-to-energy plants that burn solid waste to produce high-pressure steam; that steam turns turbines, generating more than 800 MW of electricity -- enough to power more than 900,000 homes. It also has five independent power producers (IPPs) that combust a combination of trash, waste wood, tires, coal, and gas to generate another 200 MW of electricity. Wheelabrator operates in the northeastern US, California, Florida, and Washington.

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.

Nature Group (formerly Nature Technology Solutions) provides wastewater treatment services to the oil, shipping, and offshore industries. Its technologies treat various types of industrial, marine, and oil industry waste streams, including using an environmental-friendly additive that helps remove hydrocarbons in oily wastewater. It helps operate port treatment plants in Gibraltar and Tananger, Norway, and a sewage treatment plant in Gibraltar; it is also involved in decommissioning refineries, installing treatment plants, and treating wastewater on offshore rigs.

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.

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%.

Although The Peoples Natural Gas Company brings the power of natural gas to the people of the Keystone state. The company, which operates as Dominion Peoples, serves about 359,000 commercial, industrial, residential, and transportation natural gas customers in 16 counties in southwestern Pennsylvania. By purchasing methane gas in Pennsylvania, the company keeps costs down by eliminating out-of-state transportation expenses. The gas utility was a division of Dominion Delivery, the gas and electric distribution and retail energy marketing unit of Dominion Resources. In 2010 Dominion Resources sold Peoples Natural Gas to a unit of investment firm SteelRiver Infrastructure.

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