The surface water SDL resource unit dataset defines the boundary of 29 surface water SDL areas in the Basin Plan 2012.The SDLs represent the maximum long-term average quantities of water that can be taken for consumption in any one year, i.e. the long-term average annual limit.
An SDL will be set for all diversions in each of the 29 surface-water SDL areas that have been established for the Basin Plan.
Some areas have been excluded from Basin water resources by regulation.