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): (    )

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: (Yes)

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):
East Riding of Yorkshire Council

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

5. Date of the transaction (and date on which the threshold is
crossed or  reached if different) (v):
19 February 2007

6. Date on which issuer notified:
20 February 2007

7. Threshold(s) that is/are crossed or reached:

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                   3,021,303          3,021,303
GB0031232498



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          3,021,303 3,021,303  n/a      1.51%  n/a
GB0031232498


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   voting
instrument                                   be acquired if    rights
                                             the instrument is
                                             exercised/
                                             converted.
warrants   15-06-2010  Every 15 June of each 4,700,000         2.29%
                       year from 2006 to
                       2010



Total (A+B)

Number of voting rights % of voting rights
7,721,303               3.77%


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

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:
Calculation of voting rights in Box A based on 200,356,027 ordinary
shares in issue.

Percentage of voting rights in Box B and the total box based on
200,356,027 & 4,700,000 = 205,056,027 ord shares in issue

14. Contact name:
Carolyn Johnson

15. Contact telephone number:
01482 394149



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

Anthony Lee
Tel: [phone]

---END OF MESSAGE---