Great Lakes Monitoring Illinois-Indiana Sea Grant

Welcome to Great Lakes Monitoring!

This site provides easy access to long-term, environmental monitoring data collected throughout the Great Lakes. There are a range of environmental parameters to choose from such as nutrients, contaminants and physical properties of water from various sources.

  • Explore trends across the basin and visualize available data from a variety of sources
  • Compare data among various locations or parameters
  • Search for specific data and download
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