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Watershed Management through Risk Based Effluent Criteria

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The Ontario Ministry of the Environment sets wastewater treatment plant effluent standards for five criteria: Recently, the Canadian Council of Ministers of the Environment (CCME) has developed a policy by which effluent criteria should be based upon risk-based standards.

Applying risk-based effluent criteria allows for the development of effluent limits and objectives which mitigate the effects of the wastewater discharges, as well as the other stresses on the water bodies on a site specific basis and results in a holistic overall watershed view of effluent parameters.

This paper explores the use of risk-based effluent standards to develop effluent limits and objectives and to offset impacts from non-regulated effluent parameters such as: personal care products and mitigating other stresses on the environment from stormwater discharges and potential climate change impacts are discussed.

Keywords: Ammonia; BOD; Effluent Criteria; Non Point Source Pollutants; Phosphorus; Suspended Solids; Toxicity; Watershed Management

Document Type: Research Article


Publication date: January 1, 2011

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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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