Insituform Awarded Multi-Million Dollar CIPP Contract in the Netherlands

CHESTERFIELD, MO, March 19, 2009– Insituform Technologies, Inc. (Nasdaq Global Select Market: INSU) announced today that it has been awarded an historic tender in Zoetermeer, The Netherlands. Nearly 10,000 feet of 36-inch pressure pipe will be rehabilitated using Insituform RPP™. The project, which is the largest single project Insituform has acquired in The Netherlands to date, is expected to be completed by 2011 and is worth over US $4.0 million.

Insituform RPP™, an advanced, proven and non-disruptive technology that extends the useful life of deteriorated and leaking pressure pipes, will be used to rehabilitate several thousand meters of low pressure pipe in The Netherlands. Insituform RPP™ has a construction similar to that of standard Insituform® CIPP tubes. However, special fiberglass reinforcement is included to address specific service conditions found in pressure applications.

Bruce Frost, Vice President at Insituform said, “We are proud of our Netherlands management team’s ability to win competitively priced tenders with long-term customers and provide trenchless solutions. This type of significant, repeat customer contract contributes to securing a healthy backlog for our crews in The Netherlands.”

About Insituform

Insituform Technologies, Inc. is a leading worldwide provider of proprietary technologies and services for rehabilitating sewer, water and other underground piping systems without digging or disruption. 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® and the Insituform® logo are the registered 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