DOW™ Ultrafiltration Receives California Water Recycling Certification

Edina, MN - September 30, 2008

Dow Water Solutions, a business unit of The Dow Chemical Company (Dow) and a global leader in water purification, seawater desalination, contamination removal and water reuse solutions, announces the acceptance of DOW™ Ultrafiltration for water recycling applications. The approval certifies DOW Ultrafiltration as an acceptable filtration technology in compliance with the California Water Recycling Criteria (California Code of Regulations, Title 22).

California Water Recycling Criteria recognizes membrane filtration as an acceptable filtration technology provided prescribed performance requirements are reliably met. Performance criteria through testing must demonstrate the filtered wastewater not exceed 0.2 Nephelometric turbidity units (NTU) more than five percent of the time within a 24-hour period and 0.5 NTU at any time.

"As a world leader dedicated to providing innovative water solutions, we understand the importance of standards for water recycling," said Bob Krueger, commercial development manager for Dow Water Solutions in the Americas. "This certification confirms the high quality of DOW Ultrafiltration, and we are pleased to receive the recognition from the State of California."

This 0.03 µm hollow fiber membrane technology was also approved as a compliant filtration technology under the California Surface Water Treatment Rule (SWTR), as well as the federal Long Term 1 and Long Term 2 Enhanced Surface Water Treatment Rules (LT1ESWTR, LT2ESWTR) earlier this year.

About Dow Water Solutions

Dow Water Solutions is a performance-based business unit comprised of world-class brands and enabling component technologies designed to advance the science of water purification around the world, including seawater desalination, contaminant removal and water reuse. With more than 1,000 employees worldwide, the business maintains five production facilities globally to manufacture, market and sell reverse osmosis membranes, ion exchange resins, titanium-based arsenic removal media, ultrafiltration, and electrodeionization components. Dow Water Solutions also manufactures, markets and sells premier water purification systems in China.

About Dow

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For Editorial Information:

Karen Jayne Leinberger
The Dow Chemical Company
1-952-897-4364

Gardner Hatch
Gibbs & Soell, Inc.
1-212-697-2600
ghatch@gibbs-soell.com