Holding(s) in Company

Impax Environmental Markets plc  has received the following
notification of 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: (Yes)

An acquisition or disposal of qualifying financial instruments which
may result in the acquisition of shares already issued to which
voting rights are attached: (    )

An acquisition or disposal of instruments with similar economic
effect to qualifying financial instruments (    )

An event changing the breakdown of voting rights: (      )

Other (please specify) : (     )

3. Full name of person(s) subject to the notification obligation
(iii):
Rathbone Brothers Plc

4. Full name of shareholder(s) (if different from 3.) (iv):
RATHBONE BROTHERS PLC
Rathbone Investment Management Ltd
Rathbone Investment Management International Limited
Rathbone Unit Trust Management Limited

5. Date of the transaction (and date on which the threshold is
crossed or  reached) (v):
29th October 2009

6. Date on which issuer notified:
03rd November 2009

7. Threshold(s) that is/are crossed or reached (vi, vii):
    5%

8. Notified details:


A: Voting rights attached to shares (viii, ix)


Class/type of shares if possible Situation previous to the Triggering
using the ISIN CODE                          transaction
                                 Number of shares   Number of voting
Ord 10p shares                                      Rights
GB0031232498                     15,148,604
                                                    15,148,604




Resulting situation after the triggering transaction


Class/type of       Number of Number of voting rights % of voting
shares if possible  shares                            rights
using the ISIN CODE
                    Direct    Direct    Indirect      Direct Indirect
Ord 10p shares                (xi)      (xii)
GB0031232498        N/A                               N/A    5.35%
                              N/A       16,323,757



B: Qualifying Financial Instruments
Resulting situation after the triggering transaction


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.
N/A        N/A         N/A                 N/A                 N/A



C: Financial Instruments with similar economic effect to Qualifying
Financial Instruments xv, xvi


+--------------------------------------------------------------------------------+
|Resulting situation after the triggering transaction                            |
|--------------------------------------------------------------------------------|
|Type of   |Exercise|Expiration|Exercise/   |Number of voting     |% of voting   |
|financial |price   |date xvii |Conversion  |rights instrument    |rights xix, xx|
|instrument|        |          |period xviii|refers to            |              |
|          |        |          |            |                     |              |
|----------+--------+----------+------------+---------------------+--------------|
|          |        |          |            |                     |Nominal |Delta|
|N/A       |N/A     |N/A       |N/A         |N/A                  |--------+-----|
|          |        |          |            |                     |        |     |
|--------------------------------------------------------------------------------|
|                                                                                |
+--------------------------------------------------------------------------------+



Total (A+B+C)

Number of voting rights % of voting rights

16,323,757              5.35%



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


Rathbone Brothers Plc*
Rathbone Investment Management Limited                        5.23%
Rathbone Investment Management International Limited   0.11%
Rathbone Unit Trust Management Limited                          0.01%
* Rathbone Brothers Plc is the holding company of the following.


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:

Total shares in issue used as denominator is 304,936,283

14. Contact name:

Compliance Department

15. Contact telephone number:

020 7399 0000


Enquiries:

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

Anthony Lee
Tel: [phone]

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This announcement was originally distributed by Hugin. The issuer is 
solely responsible for the content of this announcement.