||Great Lakes Binational Toxics Strategy Substances (U.S. and Canada)
The Great Lakes Binational Toxics Strategy was developed by the U.S. EPA and Environment Canada to implement the Revised Great Lakes Water Quality Agreement of 1978. The strategy classifies toxic substances into two levels of concern for priority action. "Level I" substances are the most immediate priority and are targeted for virtual
elimination. "Level II" substances have been identified by one or both countries as having the potential to significantly affect the Great Lakes ecosystem through
their use and/or release. However, "joint challenge goals" for the reduction of Level II substances have not yet been set.
The strategy uses multiple screening criteria to identify substances that are present in the water, sediment, or aquatic biota of the Great Lakes system and that are exerting, singly or in synergistic or additive combinations, a toxic effect on aquatic, animal, or human life. The criteria consider the substances' persistence in the environment, potential for bioaccumulation, and toxicity.
Level I substances were selected on the basis of their previous nomination to lists relevant to the pollution of the Great Lakes Basin ecosystem, including
1. Substances noted in the U.S. EPA's "Bioaccumulative
Chemicals of Concern" (BCCs) from "Final Water Quality
Guidance for the Great Lakes System," 1995
2. Substances identified in "Canada-Ontario Agreement
Respecting the Great Lakes Basin Ecosystem (COA)," 1994
3. Substances defined as critical pollutants by the
International Joint Commission (IJC), 1987
4. Substances designated "Lakewide Critical Pollutants in
Lakewide Management Plans (LaMPs)
Level II substances have been identified by one or both countries as having the potential to cause a significant impact on the Great Lakes ecosystem. The two nations have agreed to share information regarding the persistence, bioaccummulation potential, and toxicity of Level 2 substances. Stakeholders will be encouraged to undertake pollution prevention activities to reduce levels in the environment of those substances nominated jointly by both governments.
U.S. Environmental Protection Agency and Environment Canada.
Canada-US Strategy for the Virtual Elimination of
Persistent Toxic Substances in the Great Lakes.
EPA, Great Lakes National Program Office. DRAFT Report on Level 2 Substances in The Binational Toxics Strategy: A U.S. Perspective
List of Chemicals
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||CAS Registry Number (or EDF Substance ID)
|ALKYL LEAD COMPOUNDS||EDF-171|
|1,2,3,4,5,6-HEXACHLOROCYCLOHEXANE (MIXTURE OF ISOMERS)||608-73-1|
|POLYCYCLIC AROMATIC COMPOUNDS||65996-93-2|
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