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.

of the Agreement

Latest News

GLWQA Annex 2 Subcommittee Webinar - Wednesday, July 8, 2015

satellite photo of Lake Erie

Satellite image of an algal bloom on Lake Erie, taken August 4, 2014. NASA Worldview (

GLWQA requires the United States and Canada to reduce excess phosphorus levels that contribute to algal blooms in Lake Erie. In 2013, a binational workgroup of subject matter experts from federal, state, provincial and local governments, academia and nongovernmental organizations was convened to develop recommended phosphorus reduction targets for Lake Erie.

On June 25, 2015, those recommended phosphorus load reduction targets were presented during the semiannual Great Lakes Executive Committee meeting. Public input on the recommended Lake Erie phosphorus reduction targets can be submitted at Recommended Binational Phosphorus Targets.

By February 2016, after public input has been considered, the Great Lakes Executive Committee will recommend targets for adoption by the United States and Canada.  In addition, the United States and Canada will develop Domestic Action Plans by February 2018 outlining actions to be taken to meet the new targets.

For more information on the Great Lakes Water Quality Agreement, visit Exit.