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Ontario's water quality objective development process

Show simple item record Aquatic Criteria Development Committee, Water Resources Branch, Ontario Ministry of the Environment
dc.coverage.spatial Ontario 2019-03-14T17:50:41Z 2019-03-14T17:50:41Z 1992 1992-03
dc.description.abstract As part of its program to ensure that the surface waters of Ontario are satisfactory for aquatic life and recreation, the Ontario Ministry of the Environment develops Provincial Water Quality Objectives (PWQOs) and Guidelines (PWQGs). This report details the procedures used to develop PWQOs and PWQGs. PWQOs are developed from the best available knowledge on the effects of substances on aquatic life. Data are required for acute and chronic toxicity, bioaccumulation and mutagenicity. Also considered is available information on environmental fate, physical-chemical properties, taste and odour in water and tainting of fish tissues. If adequate information is unavailable for setting a PWQO, a PWQG is developed using uncertainty factors which depend on the quantity and quality of the toxicological data.
dc.format pdf
dc.language.iso en
dc.publisher Ontario Ministry of the Environment
dc.rights Queen's Printer for Ontario, Crown Copyright, Non-Commercial Use Permitted
dc.subject water quality
dc.subject Provincial Water Quality Objectives
dc.subject Provincial Water Quality Objectives Guidelines
dc.subject toxicity
dc.subject bioaccumulation
dc.subject mutagenicity
dc.title Ontario's water quality objective development process
dc.type Report
dc.rights.holder Queen's Printer for Ontario

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