The Water Framework Directive (Priority Substances and Classification) Regulations (Northern Ireland) 2011 No. 10

SCHEDULE 1

PART 1 Criteria for identifying the types of river, lake or transitional water to which the environmental standards specified in Part 2 of this Schedule apply

7.  To determine the total phosphorus standards to apply to a lake or any part thereof, the Department shall assign to that lake or part thereof the appropriate geological category, depth category and colour category specified in Tables 7, 8 and 9 respectively.