Nalco Holding Company Declares Quarterly Dividend


NAPERVILLE, Ill., Feb. 8, 2011 - Nalco (NYSE: NLC), providing essential expertise for water, energy and air, announced today that the Company's Board of Directors has declared a quarterly cash dividend payment of 3.5 cents per share payable on April 4, 2011, to shareholders of record on March 14, 2011.

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.

CONTACT:

Media,

Charlie Pajor,

+1-630-305-1556,

cpajor@nalco.com,

or

Investors,

Lisa Curran,

+1-630-305-1475,

llcurran@nalco.com,

both of Nalco

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