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 January 16, 2026, 21:08 (UTC)
Created January 16, 2026, 21:08 (UTC)
contains_pii non
criticality_level Faible
data_formats HTML
fair_openness Level 2 - Machine-readable
geographic_scope Canada
sensitivity_level Faible
source_inventaire Inventaire_W
source_url https://open.canada.ca/data/en/dataset/ad0d1c58-5ad6-4382-b34d-3446224a6f39
subject nature_and_environment
update_frequency as_needed
year_most_recent 2021-07-29 14:21:43.958000
year_start 2019-08-19 13:41:02.051000