Rai Catchment Management Plan 2011
Prepared for Marlborough District Council by NIWA. Although water quality in the Rai River and its tributaries is generally quite good - on an average annual basis - there are times of the year when this is not the case (notably during summer low-flows) when inputs from pastoral agriculture adversely affect the river system.
River water and habitat quality in Marlborough's Rai River catchment has, at times, become degraded as a result of inputs from farming in the catchment.
Marlborough District Council engaged NIWA to review and report on the current water quality situation in the catchment with a view to providing analysis and guidance as to practical and effective future actions that can be taken to address the water quality issues in this catchment.