EXHIBIT 23.1


                       CONSENT OF INDEPENDENT ACCOUNTANTS

We hereby consent to the incorporation by reference in this Post-Effective
Amendment No. 1 to the Registration Statement on Form S-8 of our report dated
March 12, 2004 relating to the consolidated financial statements of Insituform
Technologies, Inc., which appears in the Company's Annual Report on Form 10-K
for the year ended December 31, 2003.


/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP

St. Louis, Missouri
August 27, 2004