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Therkildsen Field Station at Emiquon University of Illinois Springfield



Live Data from Emiquon

YSI station on Thompson Lake You Can See Live Data

The Nature Conservancy, UIS’s Therkildsen Field Station at Emiquon, and YSI Inc. are involved in a project to document important data from Emiquon as it undergoes its historic transformation.

See data from Emiquon now, updated every hour, 24 hours a day!

Central to the effort is the YSI sonde, a device that measures parameters such as temperature, water depth, pH, the percentage of dissolved oxygen, and chlorophyll. The sonde makes an hourly report to YSI, and YSI makes the data available on the Web.

bottom of the YSI Sonde, showing instuments that will be submergred The picture at left shows the bottom end of a sonde, and illustrates some of the probes used to gather the data. This means scientists (and you!) can get the latest information about Emiquon’s water quality (at least in the channel) almost instantly on the Web.


1. Data furnished are real-time and have not been revised for quality or accuracy purposes. The Nature Conservancy provides no warranty, expressed or implied, as to the accuracy, reliability, or completeness of furnished data. Chlorophyll a data are not actual measurements but reflect a relationship between actual chl a measurements and those read by the YSI sonde.

2. If interested in accessing data other than that which is made available to the public, please send the following information to (a) what data is requested and (b) the time period for the requested data.


Once you link to the map, you should see three green circles (if a circle isn’t green, new data is not available at the moment). Click on a green circle, and you’ll see graphs of the latest data from the instruments at that location.

Click here to link to the Emiquon map.

Leadership lived


University of Illinois Springfield
One University Plaza
Springfield, Illinois 62703-5407



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