The Governments of Canada and the United States recently released the State of the Great Lakes 2017 Highlights Report. Overall, the Report characterizes the condition of the Great Lakes as Fair and Unchanging. While progress to restore and protect the Great Lakes has been made, including the reduction of toxic chemicals, challenges remain with issues such as invasive species and nutrients.
The “Fair and Unchanging” assessment is based upon an evaluation of nine Great Lakes Indicators of Ecosystem Health including:
- Drinking Water
- Fish Consumption
- Toxic Chemicals
- Habitats and Species
- Nutrients and Algae
- Invasive Species
- Groundwater Quality
- Watershed Impacts and Climate Trends
Of particular note, the Report found that the status of protecting the Great Lakes against invasive species was Poor and the trend was that conditions would further deteriorate. To date, over 180 aquatic non-native species have become established in the Great Lakes Basin including the Sea Lamprey, Zebra Mussels, and Purple Loosestrife. Economic impacts from invasive species exceed more than $100 million annually in the U.S. alone.
The Report marks the 45th anniversary of the signing of the Great Lakes Quality Agreement committing Canada and the United States to work together to restore and protect the water quality and aquatic ecosystem health of the Great Lakes. The nine indicators of ecosystem health are supported by 44 sub-indicators, measuring such things as concentrations of contaminants in water and fish tissue, changes in quality and abundance of wetland habitat, and the introduction and spread of invasive species. More than 180 government and non-government Great Lakes scientists and other experts worked to assemble the available data supporting the Report and its findings. The Report identifies status for each indicator as good, fair, poor, or undetermined.