Exhibit 99.1

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Solutions for Underground Pipes                 Insituform Technologies, Inc. [Logo]

insituform. more than before.

                                      Insituform

                           “A Work in Progress”

                                By Tom Rooney

                              President & CEO

                               September 2005

[picture]     Insituform Technologies, Inc. [Logo]

insituform. more than before.

This communication contains statements and information that constitute

forward-looking statements within the meaning of the Private Securities

Litigation Reform Act of 1995. These statements are based on Insituform's

current expectations and are subject to a number of risks, uncertainties and

assumptions that could cause actual results to differ materially from those

described in the forward-looking statements. Risks, uncertainties and

assumptions include, without limitation, the company's expectations

regarding the growth of its markets and the results to be achieved from its

initiatives. Insituform assumes no obligation and expressly disclaim any

duty to update the information contained herein except as required by law.

Investors are advised to review the Company's annual, quarterly and

periodic reports filed with the Securities and Exchange Commission.

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insituform. more than before.

• 1972 EPA Clean Water Act             [picture]
• Sanitary Sewer Overflows
• Infiltration                              [picture]

                 [picture]                                        [picture]

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[picture]                                                      Insituform Technologies, Inc. [Logo]

insituform. more than before.

                  Insituform's Core Business

• Invented the industry in 1971
• 55% market share (worldwide)
• Operating in 25 countries on 4 continents
• Worldwide name brand/name recognition
• Technology leader (numerous patents)
• Vertically integrated
• Experiencing 18% growth (in an 8% market)

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insituform. more than before.

                                                            Sewer Market

• Sewer rehab currently projected to grow between 8% and 10%
• Sewer construction & rehabilitation grew 19% during first 6 months of  '05 - McGraw Hill
• Insituform's sewer rehab growth is currently outpacing market growth              [picture]

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[picture]                                                                                      Insituform Technologies, Inc. [Logo]

insituform. more than before.

                                                               Sewer Market

• Wastewater systems received a D- on the ASCE 2005 Report Card for American Infrastructure
• EPA estimates by 2020, 45% of all sewer pipes will be categorized in poor or worse condition

                                                                    [graphs]

                                           Percentage of Pipe by Classification

	Excellent	Good	Fair	Poor	Very Poor	Life Elapsed
1980	69%	19%	3%	3%	2%	5%
2000	43%	17%	18%	14%	2%	7%
2020	33%	11%	12%	13%	23%	9%

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insituform. more than before.

                                                              Funding Gap

• Need is far outpacing current demand
• Municipalities are left to foot the bill with little help from federal government

            – User fees

            – Revenue bonds

            – Grants, loans, aid

• Water groups have proposed water trust fund

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[picture]                                                                                                                                                                                Insituform Technologies, Inc. [Logo]

insituform. more than before.

                                                                                        International Water & Sewer Market

• U.S. makes up 4.6% of world's population
• Water loss is a multi Billion dollar problem                                                                     [picture]
• Today in the US, the wastewater rehab market is currently 5 times larger than the water rehab market. Outside the US, this statistic is reversed
• International opportunities, especially new markets, are primarily water rehab

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[picture]                                                                                                                                                            Insituform Technologies, Inc. [Logo]

insituform. more than before.

                                                                                            Insituform’s Three Distinct Business

                                                                                                                    Segments

                  [picture]                                                           [picture]                                                                        [picture]

Sewer Rehabilitation “CIPP” – 77%               Tunneling “Affholder” – 18%                  Industrial Pipe Rehabilitation “United Pipelines” – 5%

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insituform. more than before.

Repositioning Insituform

•  New CEO - July 2003

 > Growth

 > Technological innovation

 > Operational excellence

                 Phase I                   Growth Issues                      Phase II

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insituform. more than before.

Phase I

> Re-establish sales growth @ 18%

> Safety improved by 80%

> Advanced “steam” technology

> Improved cash management

> Improved cost of quality 30%

> Streamlined logistics (trucking and wet-out)

> Expanded and improved manufacturing facilities

> Cut healthcare costs significantly

> Improved training

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[picture]                                                             Insituform Technologies, Inc. [Logo]

insituform. more than before.

                                                       Growth

                                        Technological Innovation

                                         Operational Excellence

                                       [picture]   [picture]   [picture]

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