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Great Lakes AOCs

About St. Lawrence River AOC

St. Lawrence River AOC Boundary MapSt. Lawrence River AOC Boundary MapThe St. Lawrence River at Massena was designated as an Area of Concern under the 1987 Great Lakes Water Quality Agreement. Funding from the Great Lakes Restoration Initiative's is used to remediate and restore this AOC for removal from the binational list of AOCs.

AOC Boundaries

The St. Lawrence River at Massena begins above the power dam facilities and seaway locks at the Massena Village drinking water intake.  It follows the river downstream for about fifteen miles to the international border.  It also includes portions of the Grasse, Raquette and St. Regis Rivers in New York State.  The United States, Canada and the St. Regis Mohawk Tribe at Akwesasne share authority for the AOC.

Sources of Pollution

non-point sourceSource of pollution in which wastes are not released at one specific, identifiable point but from a number of points that are spread out and difficult to identif

Beneficial Use Impairments

Beneficial Use Impairments for the Great Lakes AOCs

  • Restrictions on fish and wildlife consumption
  • Loss of fish and wildlife habitat
  • Degradation of fish and wildlife populations (likely impaired)
  • Fish tumors or other deformities (likely impaired)
  • Bird or animal deformities or reproduction problems (likely impaired)
  • Degradation of benthos (likely impaired)
  • Degradation of phytoplankton and zooplankton populations (likely impaired) – REMOVED 2015


Restoring the St. Lawrence River AOC (timeline)


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Massena Remedial Advisory Committee

Messena Remedial Advisory Committee keep informed of the remedial activities occurring in their portion of the entire international AOC. Committee meetings, on both sides of the river, are regularly attended by representatives from each others’ RAP advisory committee.

They advise local governing boards, planning boards, and zoning boards of appeals on matters related to the environment.

The St. Lawrence River Restoration Council (SLRRC) was formed in 1998 in order to complete the 64 recommended remedial actions and address the BUI’s identified within the St. Lawrence River Area of Concern at Cornwall

The Public Involvement Committee (PIC) is part of the St. Lawrence River Restoration Council. The PIC is responsible for communicating RAP progress to the public.

The St. Regis Mohawk Tribe has one of the most advanced environment divisions of any Tribe in the Country. It hopes to ensure the prevention of disease and injury, while at the same time, promoting lifestyles that respect, protect and enhance the environment.