The River Basin Districts Typology, Standards and Groundwater Threshold Values (Water Framework Directive) (England and Wales) Directions 2009 (2009 No.52)

The Classification Directions set out the principles and standards for classifying water bodies for the Water Framework Directive (WFD). They apply to Wales and England and were developed by the UK Technical Advisory Group (UKTAG) to support the implementation of the WFD.