Nutrients (Annex 4)

This is an archive of all information related to Nutrients (Annex 4).

Great Lakes Water Quality Agreement Nutrients Annex Webinar: 2023 Lake Erie Update

Please join us on Wednesday, December 13th from 10:30-12:00 pm eastern / 9:30-11:00 pm central for a webinar that will provide updates on work under the Nutrients Annex of the Great Lakes Water Quality Agreement (GLWQA). This webinar will summarize ongoing efforts to manage excess phosphorus loads that are leading to toxic and nuisance algal […]

Posted: November 27, 2023

Nutrients Annex Subcommittee Recommends Retaining Lake Ontario Phosphorus Targets

To help manage nutrient loads and mitigate the impacts of harmful and nuisance algae in Lake Ontario, the United States and Canada committed, through the 2012 Great Lakes Water Quality Agreement (GLWQA), to review (and revise if appropriate) the binational phosphorus targets for Lake Ontario. Based on the findings of a recent assessment, the GLWQA […]

Posted: July 11, 2023

Lake Erie Binational Phosphorus Reduction Strategy

The Great Lakes Water Quality Agreement commits Canada and the United States to prepare and issue a Binational Strategy for Phosphorus Reduction in Lake Erie. This Strategy includes: The Strategy [PDF] (1.05 MB) was developed by the Nutrients Annex Subcommittee.

Posted: June 14, 2019

Domestic Action Plans to Achieve Phosphorus Reductions in Lake Erie

To combat the growing threat of toxic and nuisance algal development in Lake Erie, the United States and Canada committed, through the 2012 Great Lakes Water Quality Agreement, to establish binational phosphorus load reduction targets for Lake Erie by February, 2016, and to develop domestic action plans by 2018 that will outline strategies for meeting […]

Posted: March 7, 2018

Draft Domestic Action Plans for Achieving Phosphorus Reductions in Lake Erie

To combat the growing threat of toxic and nuisance algal development in Lake Erie, the United States and Canada committed, through the 2012 Great Lakes Water Quality Agreement, to establish binational phosphorus load reduction targets for Lake Erie by February, 2016, and to develop, by 2018, domestic action plans that will outline strategies for meeting […]

Posted: March 10, 2017

The United States and Canada Adopt Phosphorus Load Reduction Targets to Combat Lake Erie Algal Blooms

To combat the growing threat of toxic and nuisance algal development in Lake Erie, the United States and Canada committed, through the 2012 Great Lakes Water Quality Agreement, to establish binational phosphorus load reduction targets for Lake Erie by February, 2016. In response to this commitment, following a robust binational science-based process and extensive public […]

Posted: February 22, 2016