The Jamaica Agricultural Society (JAS) says farmers may have suffered millions of dollars in losses arising from the release of harmful contaminants from Windalco's bauxite refinery in Ewarton into the Rio Cobre.
The effluent polluted the river and caused a major fish kill.
The JAS is conducting an assessment of the damage to farming caused by the pollution in the river.
President of the JAS, Lenworth Fulton told Radio Jamaica News that the pollution had multiple impacts on farmers.
He said there was significant damage to agricultural crops.
Mr. Fulton also stated that farmers who suffered losses due to the release of harmful contaminants into the Rio Cobre will be compensated.
Meanwhile, some farmers in St Catherine say losses from the Rio Cobre contamination could exceed $30 million.