NEW CLARK COUNTY, NEVADA CONTRACT BRINGS TOTAL AWARDS TO INSITUFORM TO MORE THAN $24 MILLION IN 2009
Insituform to Perform Sewer Pipe Rehabilitation Without Disruption to County Neighborhoods and Businesses

CHESTERFIELD, MO, July 16, 2009 – Insituform Technologies, Inc. (Nasdaq Global Select Market: INSU) announced the Clark County Water Reclamation District in Nevada has awarded an additional $6.8 million contract to Insituform for sewer pipe rehabilitation. In total, Clark County has awarded Insituform, a pre-qualified contractor, more than $24 million in contracts so far in 2009. Insituform’s cured-in-place (CIPP) technology rehabilitates sanitary sewers, storm sewers and force mains without the need for digging.

Insituform will begin work on this project in August 2009 and will rehabilitate approximately 26,000 feet of 27-inch and 30-inch diameter aging sewer pipes. The project, which is part of Clark County’s five-year plan to rehabilitate all its large-diameter sewer pipelines, is expected to be completed by August 2010. Since 2005, Insituform has rehabilitated more than 43 miles of sewer pipeline in Clark County with minimal disruption to homes and businesses.

The Insituform® CIPP process is Insituform’s core technology and is an affordable solution used to reduce infiltration, restore structural integrity and increase flow capacity. Insituform® CIPP is a jointless pipe-within-a-pipe with the capability to rehabilitate pipes ranging in diameter from six to 96 inches.

“We appreciate the opportunity to continue our work with the Clark County Water Reclamation District as they rehabilitate their sewer system,” said Joe Lane, General Manager for Insituform’s West Region. “By using Insituform® CIPP, Clark County has been able to upgrade their system at a lower cost and with less disruption to citizens and businesses than if they had used traditional dig and replace methods,” Lane continued. “It’s truly the most efficient and low-cost way to upgrade your sewer system.”

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 and the Insituform® logo are the registered trademarks of Insituform Technologies, Inc. and its affiliates.

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