In a first for the UK water industry a code of practice for assessing surface water treatment technologies has been published by British Water. The document, which took over two years to develop, has been supported by the Environment Agency and manufacturers of surface water treatment devices.

British Water members ACO Technologies, Hydro International and Polypipe joined with the environmental regulator to sponsor an in-depth study of UK rainfall by research consultancy HR Wallingford. The information was key to the development of a robust product testing protocol.

British Water technical director Marta Perez said, “Standards are necessary to demonstrate how well proprietary devices used in sustainable drainage systems (SuDS) treat run-off and remove heavy metals from the water cycle. Until now, there was no standard for testing in the UK.

“Conducting tests overseas creates a heavy cost burden which was prohibitive for smaller UK manufacturers looking to sell at home. This code of practice defines the process necessary to measure the pollutant capture and retention capability of any device entering the UK market.”

The voluntary code of practice allows professionals delivering SuDS to apply a risk-based approach to minimising the environmental impact of the diffuse pollution from runoff. Verifying the capture and retention capabilities of different devices for a range of pollutants gives regulators, designers, specifiers and local authorities the information they need to select the most appropriate technology in a given application. Click here to read more.