Great Lakes Observing System

Great Lakes Water Quality Data

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The GLOS is a network of people and technology coordinated to provide free, easily-accessible data about the Great Lakes. With a focus in Ecosystem Health, Maritime Operations, Public Health, Water Security and Climate Change Adaption. The GLOS is one of 11 Regional Associations of the Integrated Ocean Observing System (IOOS®), working to enhance the ability to collect, deliver, and use ocean and Great Lakes information. IOOS is a partnership among federal, regional, academic and private sector parties that works to provide new tools and forecasts to improve safety, enhance the economy, and protect our environment.

Members (5)

  • 2158


  • 5


  • 0



  1. City of Toledo 7720 Points
  2. Avon Lake Regional Water 6330 Points
  3. City of Elyria 6280 Points
  4. State University of New York College of Environmental Science and Forestry (SUNY-ESF) 5650 Points
  5. LimnoTech 5600 Points

Areas monitored

Ann Arbor, Michigan, United States

Locations & Observations

Locations Last observation made
Lake Erie : crib I 2016-10-09 04:00 UTC Contributed 360 of 360 Observations
Lake Erie : leavon 2016-10-11 21:50 UTC Contributed 433 of 433 Observations
Lake Erie : leelyr 2016-10-11 04:00 UTC Contributed 428 of 428 Observations
Lake Erie : leorgn 2016-10-11 04:00 UTC Contributed 572 of 572 Observations
Lake Ontario : ESF2 2016-10-12 00:03 UTC Contributed 365 of 365 Observations