UNTIED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 14A

           Proxy Statement Pursuant to Section 14(a) of the Securities
                              Exchange Act of 1934

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                          INSITUFORM TECHNOLOGIES, INC.
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                (Name of Registrant as Specified In Its Charter)

                           Water Asset Management LLC
                    Water Investment Advisors (Cayman), Ltd.
                           TRF Master Fund (Cayman) LP
                               Matthew J. Diserio
                               Disque D. Deane Jr.
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    (Name of Person(s) Filing Proxy Statement, if other than the Registrant)

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     On January 25, 2008, Water Asset Management LLC, Water Investment Advisors
(Cayman), Ltd., TRF Master Fund (Cayman) LP, Matthew J. Diserio and Disque D.
Deane Jr. filed with the Securities and Exchange Commission (the "SEC") an
amendment to their Schedule 13D ("Amendment No. 1") with respect to Insituform
Technologies, Inc., a Delaware corporation. Amendment No. 1 is attached hereto
as Exhibit 1 and is incorporated herein by reference.


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      Exhibits
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      Exhibit 1 Amendment No. 1 to Schedule 13D of Water Asset Management LLC,
                Water Investment Adviors (Cayman), Ltd., TRF Master Fund
                (Cayman) LP, Matthew J. Diserio and  Disque D. Deane Jr., filed
                with the SEC on January 25, 2008