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Case study 2 – Assessment of Escherichia coli Load Reductions to Achieve Freshwater Objectives in the Rivers of Otago

This study quantifies the Escherichia coli (E. coli) load reductions needed to achieve options for freshwater objectives for human contact in rivers of the Otago region.

This report describes nutrient (nitrogen and phosphorus) load reductions predicted to achieve options for freshwater objectives (FWO) in rivers, lakes and estuaries in Otago. The analysis does not consider how the nutrient load reductions would be achieved and only aims to inform the Otago Regional Council about the magnitude of the load reductions needed for each option, how these vary across the region, and the uncertainty inherent in this assessment.