Why have these regulations come into force?
Welsh Government has been looking to move away from traditional drainage solutions for some time as these techniques are designed to remove water away from developed areas with no regard for the drainage regime downstream or the quality of the water. What SuDS aim to do is mimic the natural drainage patterns of the area, which reduce the chance of flooding and pollution on the surrounding water bodies.
Schedule 3 of the Flood and Water Management Act (FWMA) 2010 is the legislation that is driving the introduction of SuDS throughout Wales. All new developments will have to have approved surface water drainage systems on developments of 2 or more properties or that have a construction area of over 100m2
SuDS - Welsh Government