Insituform Awarded US$27.0 Million Contract to Repair Wastewater and Stormwater Pipes for Sydney, Australia
Sewer Rehabilitation Technology Renews Sydney’s Pipelines and Helps Protect Neighborhoods, Parks and Coastline for the Next 50 Years

SAINT LOUIS, MO, August 12, 2009– Insituform Technologies, Inc. (Nasdaq Global Select Market: INSU) announced today that Sydney Water has awarded its Asia Pacific operation two contracts for small and medium diameter sewer and stormwater pipeline rehabilitation. The combined three-year term contracts are Insituform’s largest award in Australia to date and have a budgeted value of US$27.0 million, with the potential for additional work.

The awards are part of Sydney Water’s SewerFix Program, which is a three-year sewer rehabilitation program designed to protect public health and reduce the number of sewage overflows reaching the environment. Insituform’s US$27.0 million contract is a portion of the US$70.0 million award shared by three contractors.

During the next three years, Insituform will employ over 50 employees in the Sydney area. Insituform will also work with local subcontractors to complete these projects.

Insituform® CIPP (cured-in-place pipe), Insituform’s core technology, and the iPlus Infusion™ lining system, Insituform’s next generation CIPP solution, will be used to rehabilitate pipelines in urban, coastal, national park and environmentally sensitive areas.

Sydney Water, Australia’s largest water utility covering over 12,700 square kilometers, provides drinking water, recycled water, wastewater services and stormwater services to more than four million people.

Daniel Gamboa, Insituform Pacific’s General Manager - Australia, said, “We have completed over 25 pipeline rehabilitation projects during the past two years in Australia and continue to expand our capabilities in this market as well as provide innovative solutions which were not previously available to our customers. We
congratulate Sydney Water on their ambitious environmental and economic sewer rehabilitation program and look forward to working with them on these projects.”

“Over the past two years, we have delivered a diverse range of gravity and pressure pipe rehabilitation projects as a joint venture partner with VSL International Ltd. In order to expand our visibility in the Asia Pacific market, we have established Insituform Pacific Pty. Ltd. and Insituform Asia Ltd. as wholly owned subsidiaries of Insituform Technologies, Inc. We currently have operations in Australia, Hong Kong, Singapore and India and are excited about our growth opportunities,” remarked Daniel Cowan, Insituform’s Vice President - Asia/Pacific. Mr. Cowan relocated to Hong Kong earlier this year.

For photography, an interview, or more information on the CIPP process and how it works, please contact Aura Joyce at 636-530-8775 or ajoyce@insituform.com.

About Insituform
Insituform Technologies, Inc. is a leading worldwide provider of proprietary technologies and services for rehabilitating sewer, water, energy and mining piping systems and the corrosion protection of industrial pipelines. More information about the Company can be found on its internet site at www.insituform.com.

Forward-Looking Statements
The Private Securities Litigation Reform Act of 1995 provides a “safe harbor” for forward-looking statements. The Company makes forward-looking statements in this news release that represent the Company’s beliefs or expectations about future events or financial performance. These forward-looking statements are based on information currently available to the Company and on management’s beliefs, assumptions, estimates or projections and are not guarantees of future events or results. When used in this document, the words “anticipate,” “estimate,” “believe,” “plan,” “intend,” “may,” “will” and similar expressions are intended to identify forward-looking statements, but are not the exclusive means of identifying such statements. Such statements are subject to known and unknown risks, uncertainties and assumptions, including those referred to in the “Risk Factors” section of the Company’s Annual Report on Form 10-K for the year ended December 31, 2008, as filed with the Securities and Exchange Commission on March 2, 2009, and in our subsequent quarterly reports on Form 10-Q. In light of these risks, uncertainties and assumptions, the forward-looking events may not occur. In addition, our actual results may vary materially from those anticipated, estimated, suggested or projected. Except as required by law, we do not assume a duty to update forward-looking statement, whether as a result of new information, future events or otherwise. Investors should, however, review additional disclosures made by the Company from time to time in its
periodic filings with the Securities and Exchange Commission. Please use caution and do not place reliance on forward-looking statements. All forward-looking statements made by the Company in this news release are qualified by these cautionary statements.

Insituform®, iPlus™ Infusion™ and the Insituform® logo are the registered and unregistered trademarks of Insituform Technologies, Inc. and its affiliates.

For more information, contact:
David F. Morris
Senior Vice President and Chief Administrative Officer
636-530-8000