Notice of Final Results

06 February 2012

Hydro International plc

("Hydro" or the "Company")

Notice of Final Results

Hydro International (AIM:HYD), a leading provider of environmentally sustainable and innovative products for the control and treatment of water, will be announcing Final Results for the year ended 31 December 2011 on Tuesday 6 March 2012.

The management will be hosting a presentation for analysts on the day of results at 09:30am at the offices of Newgate Threadneedle: 3rd Floor Aldermary House, 10-15 Queen Street, London, EC4N 1TX.

Analysts who wish to attend the presentation should register their interest with Fiona Conroy, contactable at [email protected] or 020 7653 9847.

Enquiries:

About Hydro International

Hydro International plc (AIM:HYD.L) (Hydro) is a global supplier of environmentally sustainable solutions and innovative products for the control and treatment of stormwater, wastewater and combined sewer overflows. Hydro's products use a range of advanced technologies including award-winning advanced vortex technology. Headquartered in Clevedon, North Somerset, Hydro also operates in the UK from offices in Ely, Cambridgeshire as well as across the US from bases in Portland, Maine and Hillsboro, Oregon. The Group has a growing presence outside of its core US and UK markets in Ireland, Egypt, Middle East, European Union, Malaysia, Singapore, Japan, Korea, Australia and New Zealand.

Please visit the website for further information www.hydro-international.biz.