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: (Yes)

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):
18 December 2007

6. Date on which issuer notified:
19 December 2007

7. Threshold(s) that is/are crossed or reached:
From 4%-3% (L & G)

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




A: Voting rights attached to shares


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


Ord 10p shares                 8,717,803        8,717,803
                               (prior to        (prior to conversion)
                               conversion)



Resulting situation after the triggering transaction (vii)


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


Ord 10p shares     10,798,833 10,798,833              3.58%



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
10,798,833              3.58%


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) (10,798,833 - 3.58% = LGAS,
                             LGPL & PMC)
Legal & General Investment Management (Holdings) Limited (Direct)
(LGIMHD) (9,680,123-3.21%=PMC)
Legal & General Insurance Holdings Limited (Direct) (LGIH)
Legal & General Assurance (Pensions Management) Limited  (PMC)
(9,680,123-3.21% = PMC)
Legal & General Assurance Society Limited  (LGAS & LGPL)
Legal & General Pensions Limited (Direct)  (LGPL)


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 301,246,052

14. Contact name:
Helen Lewis (LGIM)

15. Contact telephone number:
020 3124 3851



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

Russell Scott
Tel: [phone]

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