Impacts to Our Local Waters

Impacts to the St. Lawrence River

The St. Lawrence River (Kaniatarowanenneh) that runs through Akwesasne, Cornwall, and Massena was designated an Area of Concern (AOC) by the governments of Canada, the United States, and Akwesasne alongside the International Joint Commission (IJC) in 1987.

The Area of Concern includes approximately 80 km of the St. Lawrence River to the eastern outlet of Lake St. Francis, located within Akwesasne Territory. The entire AOC is divided by the international border: jurisdiction in the United States portion is shared between the United States, New York State, and the Saint Regis Mohawk Tribe; while jurisdiction in the Canadian portion is shared between Canada, Ontario, Québec and the Mohawk Council of Akwesasne. Each of these government bodies has its own respective environmental health legislation, evaluation criteria, and standards, making it increasingly difficult to ensure rules, regulations and safe environmental practices are being pursued.

The identified environmental issues or challenges on the St. Lawrence River at Akwesasne are called “Beneficial Use Impairments” or BUIs. The following BUIs were identified in the Akwesasne, Cornwall, and Massena area of the River: 

  • Fish Consumption,
  • Fish and wildlife populations, 
  • Algae health,
  • Fish and wildlife habitats,
  • Plankton health.

Similarly, neighbouring towns have polluted the Waters from multiple power plants dumping upstream, impacting the people of Akwesasne. The high pollutants, PCB, and mercury levels have resulted in damages in the community such as health issues, and the risk of infertility in women. However, despite this research and identified impairments, much of the local community of Akwesasne are not educated or knowledgeable about the dangers and toxic realities of their local Water and environment. 

The lack of awareness and communication surrounding these present issues has enabled corporations and companies to continue polluting with little resistance. We continue to see this as recently as 2023 when Air Products, an industrial gas supply company, proposed building a hydrogen facility in Massena, located 20 minutes away from Akwesasne. This facility would produce liquid hydrogen by electrolysis, and use water from the Massena Power Canal and the St. Lawrence River (Kaniatarowanenneh). Incoming, or raw, water would be treated through a clarification system and forwarded to a raw water storage tank. While corporations are supposed to inform and educate the Akwesasne community and Mohawk Council of Akwesasne of these plans, there have been arguments that Air Products has not been upfront with their plans or the environmental impact this facility will have on The Water and environment. 

This current issue opened the conversation of environmental racism and the impacts of corporations choosing small, low income, and typically Indigenous or POC communities as their locations for pollutant factories, or environmentally harmful facilities. Luckily, through activism and awareness, Air Products has since cancelled their plans, but with the most recent passing of Ontario’s Bill 5: Protect Ontario by Unleashing Our Economy Act, which repeals the Endangered Species Act, allows the creation of lawless “Special Economic Zones," and gives corporations the green light to harm nature and communities (specifically remote Indigenous communities), it is clear that these issues are far from over.

To learn more about Bill 5 please visit The Legislative Assembly of Ontario, and fore m ore information on how this bill will impact Indigenous peoples and our inherited surroundings, please watch APTN News report on Bill 5 , or the Chiefs of Ontario's response.

Impacts to the Gananoque River

The Gananoque River in Ontario, Canada, is a small but ecologically important waterway that flows from Upper Rideau Lake to the St. Lawrence River. Like many rivers, it faces several environmental pressures that affect water quality, biodiversity, and ecosystem health. 

The Gananoque River faces various environmental challenges, including water quality concerns related to excess phosphorus, potential impacts from climate change and flooding, and the effects of development on the watershed. Protecting natural ecosystems, like the Lost Bay Nature Reserve, is crucial for mitigating these impacts.

Water Quality

Elevated levels of total phosphorus in the watershed are identified as a major water quality issue, potentially impacting aquatic life and water clarity according to the Algonquin to Adirondacks Collaborative. This can be due to runoff from agricultural activities (fertilizers, manure), urban development, and other sources. 

Climate Change
Increased rainfall and potential flooding due to climate change are causing concern, as seen with flood watches issued by Cataraqui Conservation. Flooding can damage property, disrupt ecosystems, and impact water quality. 

Development Impacts
Urbanization, agriculture, logging, and cottage development can significantly alter the landscape and increase runoff of pollutants into the river. These activities can also negatively impact biodiversity and the health of the river's ecosystem. 

Hydropower
The Gananoque Dam and Hydro Power Facility, while providing energy, can also have environmental impacts, including the potential for altered river flows, impacts on fish populations through blocking migration routes, change sediment transport and temperature regimes, and the release of greenhouse gases from reservoirs. 

Invasive Species

Species like zebra mussels and Eurasian watermilfoil compete with native species, clog water systems, and alter ecosystems. Thes invasive species are spread via boating and natural migration from the St. Lawrence River.

Local organizations like Cataraqui Region Conservation Authority and community groups monitor water quality and promote watershed stewardship. 

Impacts to the Salmon River

The Salmon River in Ontario, Canada, flows from Kennebec Lake through Lennox and Addington County and into Lake Ontario near Shannonville. It supports diverse ecosystems, communities, and recreational uses. Salmon River, and the wider Lake Ontario watershed, faces environmental challenges stemming from historical land use changes, pollution, and climate change. These factors have impacted water quality, habitat, and salmon populations. 

Climate Change
Rising temperatures, altered precipitation patterns, and increased flooding can further degrade water quality and impact salmon spawning and migration routes. More intense rainfall and longer dry spells affect flow patterns, flood risk, and aquatic habitats. Warmer water temperatures can stress cold-water fish species such as brook trout.

Industrial and Residential Development:

Early deforestation for agriculture and the construction of mills and dams significantly impacted stream quality and altered natural river flow patterns. Similarly, subsequent development has added to stream degradation through channelization, erosion, and pollution from point sources (e.g., industrial discharge) and non-point sources (e.g., urban runoff). Disruption of riparian buffers (natural vegetation along the shoreline) leads to bank erosion, loss of habitat, and increased stormwater runoff.

Pollution
Pollutants like nutrients, toxins, and sediments from various sources (e.g., industrial, agricultural, and urban runoff) continue to threaten water quality. 

Habitat Degradation
Stream channelization, erosion, and the construction of barriers like dams have fragmented river systems and reduced habitat for fish, including salmon. 

Invasive Species
The introduction of non-native species can outcompete native fish and disrupt ecosystems. Species like zebra mussels compete with native species, clog water systems, and alter ecosystems. These invasive species are spread via boating, fishing and connected waterways.

The Quinte Conservation Authority and local stewardship councils monitor and support conservation actions such as:

  • Riparian buffer planting
  • Wetland protection
  • Landowner education
  • Water quality monitoring programs

Impacts to the Cataraqui River

The Cataraqui River in Ontario is a historically and ecologically significant waterway that flows from Loughborough Lake through Kingston and into the St. Lawrence River. It’s a central part of the Rideau Canal system, a UNESCO World Heritage Site, and supports a mix of urban, rural, and natural landscapes. 

The Cataraqui River in Ontario faces environmental impacts from various sources, including industrial activity, road salt, and climate change. These impacts include mercury contamination, elevated chloride levels, and alterations to forest ecosystems. 

Climate Change
Rising temperatures, altered precipitation patterns, lower summer flows, and increased storm intensity can cause more runoff and erosion, stress cold-water species and increase algae growth, affect water quality and habitat availability.

Mercury Contamination
The Inner Harbour of the Cataraqui River in Kingston has high levels of mercury in sediments, exceeding Canadian government limits. This contamination is linked to historical industrial activity and brownfield sites along the riverbanks.

Chloride Pollution
Winter road salt application, primarily calcium chloride, leads to increased chloride concentrations in surface water, harming aquatic life. Areas with higher road densities, like Buells and Butlers Creek in Brockville, exhibit elevated chloride levels, as reported by Cataraqui Conservation. 

Urbanization Impacts

Urban development contributes to increased impervious surfaces, leading to higher stormwater runoff and potential pollutant runoff into the river. Stormwater runoff carries oil, road salt, heavy metals, and trash into the river. Impervious surfaces increase flow velocity and erosion, degrading water quality and aquatic habitat.

Invasive Species
The introduction of non-native species can outcompete native fish and disrupt ecosystems. Species like Zebra mussels, Eurasian watermilfoil, and round goby disrupt native species, clog water intakes, and alter aquatic ecosystems. These invasive species are spread via boating, canal traffic, and connected waterways.

Organizations like the Cataraqui Conservation Authority and the Rideau Valley Conservation Authority work to:

  • Monitor water quality.
  • Promote shoreline naturalization.
  • Educate the public on watershed stewardship.
  • Protect wetlands and natural areas along the river.

References

Cataraqui Conservation. (2023). Cataraqui Conservation Watershed Report Card. Retrieved from https://crca.ca/wp-content/uploads/2023-WRC-CataraquiConservation.pdf

Chiefs of Ontario. (2025). First Nations Leadership responds to the passing of Bill 5 with warning of legal and grassroots action. Retrieved from https://chiefs-of-ontario.org/first-nations-leadership-responds-to-the-passing-of-bill-5-with-warning-of-legal-and-grassroots-action/

Colello, Isabella. (2023). Green Hydrogen Facility could be coming to Massena. Retrieved from https://www.informnny.com/abc50-now/green-hydrogen-facility-could-be-coming-to-massena/#:~:text=Air%20Products%2C%20an%20industrial%20gas,as%20a%20renewable%20fuel%20source.&text=Water%20is%20needed%20for%20this%20process

Friends of Salmon River. (2017). Managing Our Watershed. Retrieved from https://www.friendsofsalmonriver.ca/managing-our-watershed/

Ling, Chris & Harris, Nitya. (2007). Salmon River Watershed Management Plan. Royal Roads University. Retrieved from https://www.crcresearch.org/case-studies/crc-case-studies/salmon-river-watershed-management-plan?utm_source=chatgpt.com

Mayberry, Rachel. (2010) Gananoque River Watershed Community Stewardship Project. Algonquin to Adirondacks Conservation Association. Retrieved from https://www.a2acollaborative.org/uploads/7/6/8/5/7685208/grwproject_phase2.pdf

Mohawk Council of Akwesasne. (2020). St. Lawrence River (Kaniatarowanenneh) Area of Concern. Retrieved from http://www.akwesasne.ca/dihe/environment/st-lawrence-river-kaniatarowanenneh-area-of concern/#:~:text=The%20Area%20of%20Concern%20includes,Grasse%2C%20Raquette%2C%20and%20St

Schultz, Caroline. (2019). Land Before Time. Ontario Nature. Retrieved from https://ontarionature.org/land-before-time-blog/

Waldron Ingrid. (2020). Environmental Racism in Canada. The Canadian Commission for UNESCO’s IdeaLab, Ottawa, Canada.