Insituform Technologies, Inc. To Announce First Quarter 2011 Results and Hold Conference Call

Insituform Technologies, Inc. (Nasdaq Global Select Market: INSU) will issue its financial results for the quarter ended March 31, 2011 on Monday, April 25, 2011 after the close of the market.

Joe Burgess, President and Chief Executive Officer, will host a conference call on Tuesday, April 26, 2011 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/554/webcasts.aspx

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, energy and mining piping systems and the corrosion protection of industrial pipelines. More information about Insituform can be found on its Internet website at www.insituform.com.