Tararua District councillor Jim Crispin fears the worst for local dairy farmers from changes to Horizons Regional Council's One Plan.
At their strategy and policy committee meeting in August, Horizons regional councillors moved a recommendation to investigate partial One Plan change options.
Horizons chairman Bruce Gordon said the decision was made because the committee was clearly informed that, following an Environment Court's ruling, if farmers had to meet the current nitrogen leaching numbers in the One Plan a significant number of businesses would no longer be viable.
Horizons have been preparing a cost analysis on the financial impact of implementing the plan in accordance with the latest Environment Court decision and Mr Crispin wants a review as fast as possible.
"This is a shocking piece of legislation," he said.
"It will have a terrible effect on our farmers and I'm hoping like hell there is a major about-turn."
John Barrow, the Tararua councillor on Horizons, said staff had been requested to investigate options to initiate a proposed change to the plan and details would be revealed at a public meeting in Dannevirke in October.