EXHIBIT 99.1

(INSITUFORM-TECH)(INSU) Insituform Technologies, Inc. Reports Third Quarter
Earnings Per Share of $0.12

         Chesterfield, MO - October 30, 2003 - Insituform Technologies, Inc.
(NASDAQ National Market: INSU) (the "Company") today announced third quarter
results.

         Consolidated revenues from continuing operations were $117.4 million
for the quarter ended September 30, 2003, a 6.5% decrease compared to $125.5
million of revenues in the third quarter of 2002. Consolidated income from
continuing operations decreased by 38.2% to $3.5 million, or $0.13 per share,
compared to $5.7 million, or $0.21 per share, in the third quarter of the prior
year. Consolidated net income for the third quarter of 2003 was $3.3 million, or
$0.12 per share, compared to $4.9 million, or $0.18 per share, in the third
quarter of 2002.

         Year to date, revenues increased 2.9% to $365.5 million from $355.2
million in 2002. Income from continuing operations was $14.7 million, a decrease
of 25.7% from $19.8 million in 2002, or $0.55 and $0.74 per share, respectively.
Discontinued operations had minimal impact on 2003 earnings year-to-date, but
accounted for a $3.3 million net loss, or $0.12 per share, in the first nine
months of 2002. Discontinued operations are expected to be substantially
completed in the fourth quarter, and the impact from discontinued operations in
the fourth quarter is expected to be similar to the third quarter.

         Thomas S. Rooney, Jr., who was appointed chief executive officer in
July, explained, "While the Company has indicated it will not provide earnings
per share guidance in the near term, we want to communicate basic information
about our operations that we believe may be useful to investors. As we had
previously indicated might be the case, some of the second quarter's negative
trends carried over into the third quarter."

         The following earnings presentation details specific items included
within the GAAP earnings per share numbers and is intended to provide additional
insight into results of operations for the third quarter of 2003, which were
significantly lower than the third quarter of 2002. For consistency with prior
period presentations, we have included the restructuring reserve and its current
period elimination in the following table.



                                    Third Quarter
                                     2003    2002
                                      
Reported EPS                       $ 0.12   $ 0.18
Discontinued operations            $ 0.01   $ 0.03
Restructuring and
  intangible charges/(credits)     $(0.01)  $ 0.14
Severance for former CEO           $ 0.03   $    -
Sale of real estate investment     $    -   $(0.03)
                                   ------   ------
EPS adjusted for specific items    $ 0.15   $ 0.32
                                   ------   ------


                  As shown in the table above, poor operational results
negatively impacted earnings per share by $0.17. The largest



operational impact affecting the third quarter of 2003 compared to the third
quarter of 2002 was a 20% decrease in work volume and performance issues on
several jobs in our product lines acquired from Kinsel, which caused a $0.10 per
share decrease in third quarter 2003 earnings compared to the same quarter of
2002. The Company has taken overhead out of these product lines and is
integrating these products (pipebursting, microtunneling, horizontal directional
drilling, sliplining and open-cut) into other existing operations. Earnings in
two domestic cured-in-place pipe ("CIPP") rehabilitation units were similarly
adversely affected by volume issues, the net impact of which was a further
reduction of $0.04 per share in the domestic rehabilitation unit when comparing
this year's third quarter with the third quarter of 2002. Tunneling volumes were
lower by approximately 8% in the third quarter compared to the same quarter of
2002. Three tunneling jobs were delayed resulting in a decrease of $0.03 per
share when comparing the third quarters of 2003 and 2002. These delays do not
represent lost business, and in fact, the Company may realize more revenue than
originally anticipated because of change orders. However, the revenues will not
likely be significant in the fourth quarter.

         Third quarter orders moderately outpaced revenue, contributing to an
increase in backlog compared to June 30, 2003. Backlog is not evenly distributed
by either product lines or geographic regions. While the Elmore division of
Affholder has struggled with low backlog, orders increased late in the second
quarter and continued into the third quarter. Therefore, under-absorption of
costs should not be as significant beginning in the fourth quarter.

         Rooney noted that, as anticipated, margins remained under pressure
during the third quarter, and are expected to remain under pressure, reflecting
a highly competitive bidding environment.

         Year-to-date operating cash flow remained strong at 1.7 times net
income. The Company invested approximately $18.9 million year-to-date on
businesses and capital assets, including $6.3 million for the purchase of
additional assets and territory rights in the United States and acquisitions in
Europe.

         During the quarter, the Company announced that it completed its
purchase of the business of Insituform East, Inc. ("East"), including selected
assets. East was the final remaining independent licensee of the Insituform(R)
CIPP process and NuPipe(R) fold and form process in North America. Rooney
commented, "The integration of Insituform East is proceeding smoothly, and we
believe that we have taken the steps to sustain a competitive advantage in this
environment. This acquisition opens up attractive markets, notably Maryland,
Pennsylvania, Ohio and Washington, D.C. The acquisition is expected to be
accretive to earnings per share in the fourth quarter of 2003."

         Commenting on the Company's outlook, Rooney observed, "Clearly, this is
an important time for Insituform. Over the past six months we have had an
opportunity to take a hard look and analyze our business from top to bottom. We
have identified several areas in which the Company can intelligently invest that
will contribute to significant improvement to revenue and earnings. We see the
next two years as a time that the Company will make well-thought-out, strategic
internal investments to improve performance and reposition the Company to
maintain our dominant status, leading the development in our industry rather
than pursuing industry trends. These investments will fall into three targeted
areas: operational expense reduction, product



innovation (which can cut costs and grow the business) and pure business growth.
While these investments will be made over the next two years, we expect to see
measurable impact to our results beginning in 12 to 18 months. Among other
things, Insituform is increasing its sales force, stepping up training,
consolidating manufacturing facilities and improving management of its truck
fleet." Rooney continued, "We are also committing significant dollars to making
our safety program world class. Not only is this the right thing to do, but I am
confident that in several years we can reduce our insurance costs
significantly."

         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 the Company 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 that could affect results
include, among others, the competitive environment for the Company's products
and services, the geographical distribution and mix of the Company's work, and
other factors set forth in reports and documents filed by the Company with the
Securities and Exchange Commission from time to time. The Company does not
assume a duty to update forward-looking statements. Please use caution and do
not place reliance on forward-looking statements.



                          INSITUFORM TECHNOLOGIES, INC.
                      CONSOLIDATED STATEMENTS OF OPERATIONS
                                   (Unaudited)
                    (In thousands, except per share amounts)



                                                     For the Three Months       For the Nine Months
                                                      Ended September 30,       Ended September 30,
                                                       2003        2002         2003         2002
                                                                               
Revenues                                            $  117,360   $ 125,523    $ 365,486    $  355,187
Cost of revenues                                        89,941      92,765      280,531       262,543
Gross profit                                            27,419      32,758       84,955        92,644
Selling, general and
  administrative expenses                               19,909      17,720       55,974        52,134
Restructuring charges
  and intangible writeoffs                                (261)      5,957         (261)        5,957
Operating income                                         7,771       9,081       29,242        34,553
Other expense:
  Interest expense                                      (2,391)     (2,103)      (5,763)       (5,935)
  Other income                                             331       1,736          573         2,520
Total other expense                                     (2,060)       (367)      (5,190)       (3,415)
Income before
  taxes on income                                        5,711       8,714       24,052        31,138
Taxes on income                                          2,228       3,326        9,381        11,921
Income before
  minority interests,
  equity in earnings and
  discontinued operations                                3,483       5,388       14,671        19,217
Minority interests in
  net income                                               (84)        (56)        (144)         (124)
Equity in earnings of
  affiliated companies                                     101         333          201           715
Income from continuing
  operations                                        $    3,500   $   5,665    $  14,728    $   19,808
Loss from discontinued
  operations                                              (215)       (788)        (231)       (3,317)
Net income                                          $    3,285   $   4,877    $  14,497    $   16,491

Earnings per share:
  Basic:
    Income from continuing
      operations                                    $     0.13   $    0.21    $    0.56    $     0.75
    Loss from discontinued
      operations                                        ($0.01)     ($0.03)      ($0.01)       ($0.13)
    Net income                                      $     0.12   $    0.18    $    0.55    $     0.62
  Diluted:
    Income from continuing
      operations                                    $     0.13   $    0.21    $    0.56    $     0.74
    Loss from discontinued
      operations                                        ($0.01)     ($0.03)      ($0.01)       ($0.12)
    Net income                                      $     0.12   $    0.18    $    0.55    $     0.62
Weighted average common
  shares - basic                                        26,451      26,507       26,475        26,534
Weighted average common
  and equivalent
  shares - diluted                                      26,638      26,615       26,593        26,763





                                                                               
SEGMENT DATA
Revenues
  Rehabilitation                                    $   89,456   $  96,601    $ 275,706    $  281,395
  Tunneling                                             22,611      24,682       74,581        62,107
  TiteLiner                                              5,293       4,240       15,199        11,685
Total revenues                                      $  117,360   $ 125,523    $ 365,486    $  355,187

Gross profit
  Rehabilitation                                    $   22,006   $  25,963    $  70,478    $   76,348
  Tunneling                                              3,791       4,776        9,725        12,052
  TiteLiner                                              1,622       2,019        4,752         4,244
Total gross profit                                  $   27,419   $  32,758    $  84,955    $   92,644

Operating income
  Rehabilitation                                    $    5,090   $   5,155    $  22,493    $   25,668
  Tunneling                                              1,876       2,738        4,293         7,100
  TiteLiner                                                805       1,188        2,456         1,785
Total operating income                              $    7,771   $   9,081    $  29,242    $   34,553




                          INSITUFORM TECHNOLOGIES, INC.
                           CONSOLIDATED BALANCE SHEETS
                                   (Unaudited)
                                 (In thousands)



                                           September 30, 2003             December 31, 2002
                                                                    
ASSETS
 CURRENT ASSETS
  Cash and cash equivalents                     $  98,907                     $  75,386
  Receivables, net                                 85,674                        82,962
  Retainage                                        23,398                        23,726
  Costs and estimated earnings
    in excess of billings                          31,846                        36,680
  Inventories                                      13,065                        12,402
  Prepaid expenses and other                       15,056                        13,586
  Discontinued assets                               3,884                         7,909
 TOTAL CURRENT ASSETS                             271,830                       252,651
 PROPERTY AND EQUIPMENT, net                       73,382                        71,579
 OTHER ASSETS                                     152,454                       148,783

TOTAL ASSETS                                    $ 497,666                     $ 473,013

LIABILITIES AND STOCKHOLDERS' EQUITY
 CURRENT LIABILITIES
  Current maturities of
    long-term debt and notes
    payable                                     $  16,900                     $  49,360
  Accounts payable and accrued
    expenses                                       66,762                        69,776
  Billings in excess of costs
    and estimated earnings                          6,011                         5,992
  Liabilities related to
    discontinued operations                           891                         3,293
 TOTAL CURRENT LIABILITIES                         90,564                       128,421
 LONG-TERM DEBT, less current
    maturities                                    114,276                        67,014
 OTHER LIABILITIES                                  3,069                         3,530
 TOTAL LIABILITIES                                207,909                       198,965
 MINORITY INTEREST                                  1,361                         1,430
 STOCKHOLDERS' EQUITY                             288,396                       272,618

TOTAL LIABILITIES AND
  STOCKHOLDERS' EQUITY                          $ 497,666                     $ 473,013




                          INSITUFORM TECHNOLOGIES, INC.
                      CONSOLIDATED STATEMENTS OF CASH FLOW
                                   (Unaudited)
                                 (In thousands)



                                                      For the Nine Months
                                                      Ended September 30,
                                                        2003       2002
                                                           
Cash flow from operating activities:
Net income                                            $ 14,497   $  16,491
  Loss from discontinued operations                        231       3,317
Income from continuing operations                       14,728      19,808
Adjustments to reconcile net income
  to cash provided by operating activities:
  Depreciation                                          11,213      10,861
  Amortization                                           1,005       1,099
  Other                                                  2,237       3,450
  Deferred income taxes                                    (30)         61
Changes in operating assets and
  liabilities, net of assets acquired:
  Receivables, including costs and estimated
    earnings in excess of billings                       2,451      (1,442)
  Inventories                                             (415)         82
  Prepaid expenses and other assets                     (3,693)     (2,388)
  Accounts payable and accrued expenses                 (1,065)     (9,614)
Total changes in operating assets and
  liabilities, net of assets acquired                   (2,722)    (13,362)
Net cash provided by operating
  activities of continuing operations                   26,431      21,917
Net cash provided (used) by operating
  activities of discontinued operations                 (1,558)      1,718
Net cash provided by operating activities               24,873      23,635
Cash flow from investing activities:
  Capital expenditures                                 (12,573)    (18,174)
  Proceeds from sale of fixed assets                       780       1,605
  Purchase of business, net of cash acquired            (6,337)     (8,459)
  Cash from sale of business                                 -       4,065
  Other investing activities                             1,406       1,548
Net cash used in investing activities                  (16,724)    (19,415)
Cash flow from financing activities:
  Proceeds from issuance of common stock                   557       1,637
  Purchases of treasury stock                           (1,597)     (4,850)
  Repayments of long-term debt                         (22,734)    (19,959)
  Issuance of long-term debt                            65,000           -
  Increase (decrease) in notes payable                 (25,835)     10,052
  Deferred finance charges                                (692)          -
Net cash provided (used) by
  financing activities                                  14,699     (13,120)
Effect of exchange rate changes on cash                    673         913
Net increase (decrease) in cash and cash
  equivalents for the period                            23,521      (7,987)
Cash and cash equivalents,
  beginning of period                                   75,386      74,649
Cash and cash equivalents, end of period                98,907      66,662


CONTACT:  Insituform Technologies, Inc.
          Joseph A. White, Vice President and CFO
          (636) 530-8000