Insituform to Announce First Quarter 2008 Results and Hold Conference Call

Chesterfield, MO - April 11, 2008 -- Insituform Technologies, Inc. (Nasdaq Global Select Market: INSU) will issue its financial results for the quarter ended March 31, 2008 on Thursday, April 24, 2008 after the close of the market.

Al Woods, Chairman of the Board and Joe Burgess, Chief Executive Officer will host a conference call on Friday, April 25, 2008 to discuss first quarter financial results. After opening remarks, there will be a limited question and answer period.

Any financial or statistical information presented during the call, including any non-GAAP measures, the most directly comparable GAAP measures and reconciliation to GAAP results, can be accessed by clicking on the Webcasts tab on the Investors page of Insituform's website (www.insituform.com) or by using the following link: http://www.insituform.com/Investors/Presentations.aspx.

EARNINGS RELEASE:
Thursday, April 24, 2008.

LIVE CONFERENCE CALL WEBCAST:
Friday, April 25, 2008, 9:30 a.m. Eastern Daylight Time.

The conference call will be webcast live via the Internet on Insituform's website (www.insituform.com). To access the webcast connect to the website five to ten minutes prior to the scheduled time.

CONFERENCE CALL REPLAY:
An audio archive of the webcast will be available beginning approximately two hours after the conclusion of the conference call through www.insituform.com. The webcast archive is available for one week.

Insituform Technologies, Inc. is a leading worldwide provider of proprietary technologies and services for rehabilitating sewer, water and other underground piping systems without digging and disruption. More information about Insituform can be found on its Internet website at www.insituform.com.

CONTACT: Insituform Technologies, Inc.
David A. Martin, Vice President and Chief Financial Officer
(636)530 8000