EXHIBIT 99.1


(INSITUFORM-TECH) (INSU) Insituform Technologies, Inc. To Report Year-End
Results by March 15


         Chesterfield, MO - January 22, 2004 - Insituform Technologies, Inc.
(Nasdaq National Market: INSU) today announced that it will report its 2003
fourth-quarter and full-year results by March 15, with the filing of its 10-K.

         "Our new Chief Financial Officer, Chris Farman, joined us only six
weeks ago. He and his team need additional time to finalize the year-end
statements," explained Thomas S. Rooney, Jr., President and Chief Executive
Officer.

         "Based on a preliminary review, we expect continued soft operating
results. We also expect to report a net loss for the fourth quarter, primarily
because of a large loss on a single job and certain reserve adjustments," Rooney
said.

         "Our balance sheet remains strong with our 2003 year-end cash balance
exceeding $100 million," he added.

         Rooney commented, "In light of these circumstances, we would be in
violation of certain financial covenants related to our senior notes, credit
facility and insurance collateral. We have begun to work closely with all
interested parties to achieve a successful and timely resolution."

         Rooney emphasized, "We are continuing to implement a disciplined,
strategic plan to achieve operational excellence while capitalizing on our
leadership position in the market."

         In concert with filing its 10-K, Insituform will conduct a conference
call.

         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 site at www.insituform.com.

         This news release contains forward-looking statements, which are
inherently subject to risks and uncertainties that could cause actual results to
differ materially from those projected. Factors which could affect results
include, among others, the competitive environment for Insituform's products and
services, the geographical distribution and mix of Insituform's work, and other
factors set forth in reports and documents filed by Insituform with the
Securities and Exchange Commission from time to time. Insituform does not assume
a duty to update forward-looking statements. Please use caution and do not place
reliance on forward-looking statements.

CONTACT:  Insituform Technologies, Inc.
          Christian G. Farman, Vice President and CFO
          (636) 530-8000