Environment groups want rules setting limits on nitrogen leaching decided by a court or board - rather than by Horizons Regional Council.

The Environmental Defence Society (EDS) and Fish & Game reacted quickly to news the Manawatū-Whanganui regional council plans to notify a proposed change to its One Plan rules on intensive farming.

The two groups took the council to the Environment Court in early 2017, and Fish & Game CEO Martin Taylor said that before 2017 Horizons was issuing consents unlawfully, and failing to implement its own One Plan.

The court found "profound deficiencies" in the way the council