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Diffuse Pollution, Degraded Waters

Emerging Policy Solutions

image of Diffuse Pollution, Degraded Waters

After decades of regulation and investment to reduce point source water pollution, OECD countries still face water quality challenges (e.g. eutrophication) from diffuse agricultural and urban sources of pollution, that is disperse pollution from surface runoff, soil filtration and atmospheric deposition. The relative lack of progress reflects the complexities of controlling multiple pollutants from multiple sources, their high spatial and temporal variability, associated transactions costs, and limited political acceptability of regulatory measures. This report outlines the water quality challenges facing OECD countries today, presents a range of policy instruments and innovative case studies of diffuse pollution control, and concludes with an integrated policy framework to tackle diffuse water pollution. An optimal approach will likely entail a mix of policy interventions reflecting the basic OECD principles of water quality management – pollution prevention, treatment at source, the polluter pays and beneficiary pays principles, equity, and policy coherence.

English

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A policy framework for diffuse source water pollution management

This final chapter presents a policy framework for diffuse source water pollution management and concludes with recommendations for central government. The framework and recommendations are based on the outcomes from the OECD Workshop on Innovative Policy Responses for Water Quality Management, and draws upon the policy analysis of case studies throughout the previous chapters of the report.

English

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