Holding(s) in Company

Impax Environmental Markets plc has today received the following
notification of a major interest in its shares.

TR-1(i): NOTIFICATION OF MAJOR INTERESTS IN SHARES

1. Identity of the issuer or the underlying issuer of existing shares
to which voting rights are attached (ii):
Impax Environmental Markets Plc

2. Reason for the notification (please state Yes/No): (    ) n/a see
additional information

An acquisition or disposal of voting rights: (No)

An acquisition or disposal of financial instruments which may result
in the acquisition of shares already issued to which voting rights
are attached: (No)

An event changing the breakdown of voting rights: (No)

Other (please specify) : (No)

3. Full name of person(s) subject to the notification obligation
(iii):
Legal & General Group plc (L & G)

4. Full name of shareholder(s) (if different from 3.) (iv):
n/a

5. Date of the transaction (and date on which the threshold is
crossed or  reached if different) (v):
n/a

6. Date on which issuer notified:
22 February 2007

7. Threshold(s) that is/are crossed or reached:
Above 3% (L & G)

8. Notified details:
.......




A: Voting rights attached to shares


Class/type of shares if possible Situation previous to the Triggering
using the ISIN CODE                        transaction (vi)
                                 Number of shares   Number of voting
                                                    Rights (viii)


Ord 10p shares                   6,013,707 3%       6,013,707
                                 (under S-198 on
                                 13-12-06)



Resulting situation after the triggering transaction (vii)


Class/type of shares if Number of Number of voting    % of voting
possible using the ISIN shares    rights (ix)         rights
CODE
                        Direct    Direct (x) Indirect Direct Indirect
                                             (xi)


Ord 10p shares          6,825,463 6,825,463           3.40%



B: Financial Instruments
Resulting situation after the triggering transaction (xii)


Type of    Expiration  Exercise/Conversion Number of voting    % of
financial  Date (xiii) Period/ Date (xiv)  rights that may be  voting
instrument                                 acquired if the     rights
                                           instrument is
                                           exercised/
                                           converted.




Total (A+B)

Number of voting rights % of voting rights
6,825,463               3.40%


9. Chain of controlled undertakings through which the voting rights
and/or the financial instruments are effectively held, if applicable
(xv):

Legal & General Group Plc (Direct and Indirect)
(Group)
Legal & General Investment Management (Holdings)
Limited (LGIMH) (Direct and Indirect)
Legal & General Investment Management Limited
(Indirect) (LGIM)
  Legal & General Group Plc (Direct) (L&G) (6,825,463-3.40% = LGAS,
                             LGPL & PMC)
Legal & General Investment         Legal & General Insurance Holdings
Management (Holdings) Limited      Limited (Direct) (LGIH)
(Direct) (LGIMHD)


Proxy Voting:

10. Name of the proxy holder:
n/a

11. Number of voting rights proxy holder will cease to hold:
n/a

12. Date on which proxy holder will cease to hold voting rights:
n/a

13. Additional information:
Notification using the total voting rights figure of 200,356,027
First notification under DTR Sourcebook

14. Contact name:
Helen Lewis

15. Contact telephone number:
020 7528 6742



The person making this annoucement on behalf of Impax Environmental
Markets plc is as follows;

Anthony Lee
Tel: [phone]

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