St. Marys River Area of Concern

The St. Marys River was designated as one of the 43 Areas of Concern in accordance with Great Lakes Water Quality Agreement (GLWQA). Remedial Action Plan (RAP) is an ongoing collaborative effort implemented by federal, provincial, and local governments as well as industry and public partners. There are 3 key stages of the RAP: Stage 1 is a detailed description of the environmental problem; Stage 2 identifies remedial actions and options; Stage 3 is the final document providing evidence that the beneficial uses have been restored and the AOC can be “delisted”.

The St. Marys River is a 112-km international channel that flows from Lake Superior into the North Channel of Lake Huron. The Area of Concern extends approximately two thirds of the river, from its head at Whitefish Bay downstream to St. Joseph Island.

For more information visit https://www.canada.ca/en/environment-climate-change/services/great-lakes-protection/areas-concern/st-marys-river.html

Data and Resources

Additional Info

Field Value
Last Updated April 17, 2026, 20:30 (UTC)
Created April 17, 2026, 20:30 (UTC)
contact_email open-overt@tbs-sct.gc.ca
contact_person {}
criticality_level []
data_dictionary []
geographic_scope ["0"]
open_canada_collection primary
open_canada_date_published 2018-05-14 00:00:00
open_canada_keywords {"fr": ["plan d'action des Grands Lacs (PAGL)", "secteur préoccupant (SP)", "d’assainissement et de remise", "politique binational", "assainissement", "partenariats", "utilisations bénéfiques"], "en": ["Great Lakes Action Plan (GLAP)", "Area of Concern (AOC)", "remedial and restoration", "binational policy", "remediation", "partnerships", "beneficial use impairments", "Environment", "Environment", "Biota"]}
open_canada_subject ["nature_and_environment"]
sensitivity_level unrestricted
title_fr Secteur préoccupant de la Rivière St. Marys
update_frequency as_needed