Holding(s) in Company

SCHEDULE 10

              NOTIFICATION OF MAJOR INTERESTS IN SHARES

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| 1) Name of company                                                |
| Impax Environmental Markets plc                                   |
|                                                                   |
| 2) Name of shareholder having a major interest                    |
| East Riding of Yorkshire Council                                  |
|                                                                   |
| 3) Please state whether notification indicates that it is in      |
| respect of holding of the shareholder named in 2 above or in      |
| respect of a                                                      |
| non-beneficial interest or in the case of an individual holder if |
| it is a holding of that person's spouse or children under the age |
| of 18                                                             |
| Shareholder named in 2 above                                      |
|                                                                   |
| 4) Name of the registered holder(s) and, if more than one holder, |
| the                                                               |
| number of shares held by each of them                             |
| East Riding of Yorkshire Council                                  |
|                                                                   |
| 5) Number of shares/amount of stock acquired                      |
| n/a                                                               |
|                                                                   |
| 6) Percentage of issued class                                     |
| n/a                                                               |
|                                                                   |
| 7) Number of shares/amount of stock disposed                      |
| 700,000                                                           |
|                                                                   |
| 8) Percentage of issued class                                     |
| 0.55%                                                             |
|                                                                   |
| 9) Class of security                                              |
| Ordinary shares of 10p                                            |
|                                                                   |
| 10) Date of transaction                                           |
| 17 March 2006 and 20 March 2006                                   |
|                                                                   |
| 11) Date company informed                                         |
| 21 March 2006                                                     |
|                                                                   |
| 12) Total holding following this notification                     |
| 3,477,472                                                         |
|                                                                   |
| 13) Total percentage holding of issued class following this       |
| notification                                                      |
| 2.73%                                                             |
|                                                                   |
| 14) Any additional information                                    |
| None                                                              |
|                                                                   |
| 15) Name of contact and telephone number for queries              |
| Anthony Lee                                                       |
| Tel: [phone]                                                |
|                                                                   |
| 16) Name of authorised company official responsible for           |
| making this notification                                          |
| Anthony Lee                                                       |
|                                                                   |
| Date of notification: 21 March 2006                               |
|                                                                   |
|                                                                   |
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