Impax Asian Environmental Markets plc (the "Company") announces that on 17 August 2012 it purchased 260,000 of its own ordinary shares in the market at an average price of 74.28p per share.  The highest price paid per ordinary share was 75.0p and the lowest price paid was 74.0p. These shares will be held in Treasury.

Following this share re-purchase, the Company's share capital consists of 214,990,475 ordinary shares of 1p each and 39,000,116 subscription shares of 0.1p each.  The Company will be holding 9,436,000 ordinary shares in Treasury.  The ordinary shares (excluding shares held in Treasury) each carry one voting right.  The subscription shares do not carry voting rights.

Therefore, the total number of voting rights for ordinary shareholders is 205,554,475.  For shareholders holding both ordinary shares and subscription shares, the total number of voting rights is 244,554,591.*

The above figures may be used by shareholders as denominators for the calculations by which they will determine if they are required to notify their interest in, or a change of interest in, the Company under the FSA's Disclosure and Transparency Rules.

* The subscription shares are considered to be qualifying financial instruments under the FSA's Disclosure and Transparency Rules.

Enquiries

Anthony Lee                                        020 7490 4355

Company Secretary

Cavendish Administration Limited

Dominic Waters                                  020 7523 8473

Canaccord Genuity

17 August 2012