The Surface Waters (Abstraction for Drinking Water) (Classification) (Scotland) Regulations 1996
These Regulations prescribe a system for classifying the quality of inland waters according to their suitability for abstraction for supply as drinking water, in implementation of Directive 75/440/EEC (quality required of surface water intended for the abstraction of drinking water). They provide mandatory values for classifications DW1, DW2 and DW3 in Schedule 1 to the Regulations and guideline values for those classifications in Schedule 2 to the Regulations.