Serving the Global Water and WasteWater Community

Nalco Program Saves Water and Energy for Marriott Hotel in Mumbai

Naperville, Ill. Nalco (NYSE:NLC), providing essential expertise for water, energy and air, has helped the 583-room Marriott Renaissance Mumbai Convention Centre and Marriott Executive Apartments drastically reduce water use in its cooling systems which also resulted in less energy use and wastewater discharge from the facility.

Nalco 3D TRASAR® Technology for Cooling Water combines innovative chemistry with state-of-the-art monitoring and control hardware and software to optimize the 5-star hotel’s cooling system, allowing reuse of wastewater, cutting fresh water use by 16 million gallons per year. Improved cooling system performance – by preventing scale buildup, corrosion and microbiological fouling – also prolongs equipment life and conserves 600,000 kWh of energy, avoiding more than 400 tons of greenhouse gas emissions as well.

This success in Mumbai is an example of a major program launched by Marriott with Nalco to deliver 450 million gallons in water savings over a three-year period by using Nalco monitoring equipment to optimize the water treatment in chillers and cooling towers in Marriott full-service hotels worldwide. The program is one of a number of steps being taken by Marriott to further reduce energy and water consumption by 25 percent per available room by 2017.

The Nalco 3D TRASAR system works proactively to prevent the forma tion of scale, corrosion, and equipment fouling or malfunction before it occurs. A fluorescent particle tagged to water treatment chemicals allows the system to continuous ly monitor and adjust chemical consumption for optimal use, reducing overall chemical use and preventing system fouling.

For more about the water and energy savings at the Marriott Renaissance Mumbai Convention Centre, visitwww.nalco.com/Marriott.

About Nalco

Nalco is the world’s largest sustainability services company focused on industrial water, energy and air applications; delivering significant environmental, social and economic performance benefits to our customers. We help our customers reduce energy, water and other natural resource consumption, enhance air quality, minimize environmental releases and improve productivity and end products while boosting the bottom line. Together our comprehensive solutions contribute to the sustainable development of customer operations. Nalco is a member of the Dow Jones Sustainability World and North America Indexes. More than 12,000 Nalco employees operate in 150 countries supported by a comprehensive network of manufacturing facilities, sales offices and research centers to serve a broad range of end markets. In 2010, Nalco achieved sales of $4.25 billion. For more information visit www.nalco.com.

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