Aquatic invasive species (AIS) have an impact on nearly every beneficial aspect of the Great Lakes.  Public and private stakeholders recognize that effective AIS prevention and control is needed to protect coastal industries, water quality, ecosystem services, and human health. Federal, state and provincial agencies are making meaningful binational commitments and substantial investments to protect our Great Lakes from harmful AIS. Advised by agency representatives and other partners, Blue Accounting is tracking regional progress on efforts both to prevent further AIS introduction and spread as well as minimize the harmful impacts of already-established AIS.


The number of non-native species established in the Great Lakes


The estimated percentage of non-native species in the Great Lakes believed to be invasive and causing negative impacts


The number of new established non-native species documented in the Great Lakes since 2007

Download the Blue Accounting AIS fact sheet.

Numerous local, state, provincial and federal plans and policies, including the Great Lakes Water Quality Agreement and Great Lakes Restoration Initiative Action Plan, identify goals and strategies for tackling the problem of aquatic invasive species (AIS). These shared regional goals are to:

  • Prevent the introduction of new aquatic invasive species
  • Detect and respond to new introductions of aquatic invasive species
  • Control established aquatic invasive species to reduce impacts

More About AIS

The Great Lakes Basin is among the most heavily invaded freshwater systems in the world. Its food webs are dominated by invasive species that change how the ecosystem functions and result in substantial economic costs to the region by limiting access to clean water, interfering with recreation, disrupting fisheries and hurting tourism.