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Great Lakes Water Quality Agreement (GLWQA)

The Great Lakes Water Quality Agreement is a commitment between the United States and Canada to restore and protect the waters of the Great Lakes. The Agreement provides a framework for identifying binational priorities and implementing actions that improve water quality. EPA coordinates U.S. activities under the Agreement.

Background of the Agreement

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Phosphorus Reduction Strategy to Combat Lake Erie Algal Blooms

In 2016, in response to the 2012 Great Lakes Water Quality Agreement commitments, Canada and the U.S. adopted phosphorus reduction targets for Lake Erie. Each country is developing domestic action plans which outline strategies for meeting the new targets. The U.S. Action Plan summarizes the actions federal agencies and states are taking across the basin, and provides a mechanism for tracking progress.

Federal and state partners engaged stakeholders in the development of the domestic action plans in 2017, through in-person engagement sessions with targeted stakeholder groups. Read the U.S. Action Plan for Lake Erie.

The full suite of U.S., state and Canada-Ontario domestic action plans is available on