St. Marys River: Area of Concern
The St. Marys River was designated as a binational Area of Concern (AOC) in 1987 under the Canada-U.S. Great Lakes Water Quality Agreement. Pollution from industrial and municipal wastewater along with changes to the watercourse led to its degraded water quality and environmental health. Nine out of 14 beneficial use impairments (BUIs) were identified, which measure the environmental, human health or economic impact of poor water quality. One additional beneficial use was deemed “requiring further assessment”, meaning more information was required to determine whether it was impaired.
Accomplishments
Over the past 30 years, there has been significant progress in restoring the water and environmental quality of the AOC. On the Canadian side, this includes:
- compliance with industrial regulations introduced in the mid-1990s, which drastically reduced the entry of contaminants from the local steel mill and contaminants from the local paper mill, the latter of which eventually closed in 2012
- upgrades to the City of Sault Ste. Marie’s largest wastewater treatment plant in 2006 and the implementation of a Stormwater Management Master Plan in 2015 to better manage urban runoff and reduce pollution from entering the river
- removal of over 31,000 cubic meters of contaminated sediment from the Algoma Steel boat slip, which prevents additional contaminants from entering the river
- restored fish and wildlife habitat, including a naturalization project in the Bar River tributary to reduce sedimentation, expand habitat and allow for better fish spawning
Restoration of beneficial uses
Over the last decade, significant progress has been made to improve environmental conditions on the Canadian side. These beneficial uses are no longer considered “impaired”:
- bird or animal deformities or reproduction problems (2016)
- eutrophication or undesirable algae (2018)
- beach closings (2018)
- degradation of aesthetics (2018)
- degradation of fish and wildlife populations (2024)
Work continues on restoring the remaining beneficial uses:
- restrictions on fish and wildlife consumption – wildlife consumption is not impaired and an analysis of fish contaminants, consumption advisories and a community survey on fish consumption habits are underway
- restrictions on dredging activities – implementation of the In-water and Dredging Administrative Controls Document to meet the established restoration criteria is underway and a BUI assessment report to evaluate its not impaired status is undergoing community review
- fish tumours or other deformities – a fish tumour survey is being conducted to determine current fish tumour rates, which have already dropped from 11% to 6% between 2009 and 2017
- degradation of benthos – a sediment management strategy has been developed with community input, which outlines specific plans and actions needed for sites across the AOC
- loss of fish and wildlife habitat – there is no impairment of wildlife habitat and efforts are underway to improve aquatic habitat for fish, specifically around Whitefish Island
Recent actions
The overall health of the St. Marys River has continued to improve through these recent actions:
- in 2017 and 2019, over 17,000 cubic meters of contaminated sediment was dredged and removed from the Algoma Steel boat slip and the company is evaluating the extent of remaining contamination and appropriate next steps
- we are collaborating with the Batchewana First Nation on the planning and design of fish habitat improvements at Whitefish Island, which will involve naturalizing a cold-water stream and adding fish nursery sites
Remaining actions
We will continue to work with local and provincial partners to support restoration actions and the environmental monitoring and assessment studies needed to confirm environmental quality objectives are met. Priorities are to:
- implement the sediment management strategy, developed with community input, outlining specific plans for sites in the AOC, including actions needed and associated timelines
- advance efforts to improve fish and wildlife habitat, specifically working with the Batchewana First Nation on the Whitefish Island Habitat Project
Outlook
The St. Marys River has seen significant progress towards restoration since its designation as an AOC. Under the Canada-Ontario Agreement on Great Lakes Water Quality and Ecosystem Health, we will work with the province of Ontario to continue making progress towards remediation, environmental recovery and restoration of beneficial uses.
Our partners
On the Canadian side, we partner with other levels of government, non-government groups, Indigenous communities and members of the public. This restoration work requires a large amount of scientific and technical expertise, local knowledge, hard work and the help of:
- Algoma Public Health
- Algoma University
- Batchewana First Nation
- Binational Public Advisory Council
- City of Sault Ste. Marie, Ontario
- Fisheries and Oceans Canada
- Garden River First Nation
- Métis Nation of Ontario
- Ontario Ministry of the Environment, Conservation and Parks
- Ontario Ministry of Natural Resources and Forestry
- Sault Ste. Marie Region Conservation Authority
- Transport Canada
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