Indicator 2.6.6

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System

Water Type

Feed Dependent

Species

Indicator 2.6.6

by Contact on 8 October 2026

Requirement

The UoC shall define the Waterbody Unit of Management (WUM), following the method outlined in Appendix 8 (8.6). An exception applies where a WUM is already defined, in which case the UoC shall provide evidence of the defined WUM.

How Do I Interpret This Requirement?

  • The following characteristics should be used to define the Waterbody Unit of Management (WUM):

    • The WUM reflects a logical geographic scope, for example, a lake and its catchment area.

    • The boundaries of the waterbody reflect the ability to realistically manage eutrophication risk within it.

    • Boundary setting should consider hydro-morphology, bathymetry, water movement and stratification characteristics.

      • Areas with high risk of adverse impacts due to cumulative effects, for example HIEs in larger waterbodies, should be a separate WUM.

      • Areas established for water quality monitoring at a national or regional level.

    • The Water Quality Advisory Committee (WQAC) can resolve issues with defining the WUM where the WUM boundaries are not clear.

Evidence of Implementation

  • A map of the WUM which includes the components outlined in Appendix 8 (8.6).

    • The map should be updated on an annual basis where required.

  • The results of measurements to confirm if the WUM is a HIE (if applicable).

Auditors Should Confirm

  • A map of the WUM has been developed and presented by the UoC, according to the method outlined in Appendix 8 (8.6).