St. Louis River AOC

Real-Time Water Quality Sensors for Western Lake Superior
and the St. Louis River Estuary

This interactive map allows users to identify sources of real-time water quality and flow data in the region. Clicking each station dot provides a direct link to access data and graphing tools used by the host organization as well as a link to a unique interactive visualization and animation tool to explore the data further.

St. Louis Bay Fisheries Data Plotter

St. Louis River Water Quality Data Viewer

Shows recovery from sewage and paper mill effluent, data from 1922-1996

St. Louis River Data Sites

• St. Louis River @ Duluth Inlet  

• St. Louis River @ Superior Inlet  

• Western Lake Superior Sanitary District (WLSSD) Historical and Ongoing Monitoring Data 
  
  

• WLSSD Discharge (flow, turbidity, precipitation) 
  
  

• St. Louis River @ Scanlon (USGS upstream from Thomson Reservoir)  

   

• St. Louis River Estuary Beach Monitoring: Minnesota and Wisconsin
  
  
  

  
   

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