Waikato Regional Council is looking to scrap a programme to improve water quality in the region.
The "clean streams" programme aims to improve water quality by getting farmers to fence off waterways and plant native trees and shrubs around river headwaters.
The council provides the plants at subsidised rates, and says the number of orders has increased by 40% since last year.
The scheme is now seven years into a 10 year plan.
Catchment Services Committee chair Andra Neeley says there have been some encouraging signs from the Mangarei catchment, although it's too early to tell whether there's been any real improvement in water quality for most catchments.