Regional council director of policy planning and resource management Fraser McRae said mediation was continuing and the council was due to report back to the Environment Court by the end of the month.
If an agreement is not reached during the mediation process the appeal will be decided in an Environment Court hearing.
The Lindis catchment decision is part of the regional council's water plan to promote the sustainable management of region's water resources.
The Manuherikia catchment area is now going through a plan change process which will seek to set minium flow limits on the Manuherikia River, one of the driest areas in New Zealand.