Volunteers, DNR staff, county staff and others collect water clarity, temperature
and dissolved oxygen, as well as other water quality data, on lakes across Wisconsin.
Around 1,000 volunteers are currently active, and the network has been going strong
since 1986. Water clarity is measured with a black and white disk called a "Secchi
Satellite images are used to predict water clarity in lakes across the state. This
effort began in 1999 when the University of Wisconsin- Madison Remote Sensing Center
developed a model, using on-the-ground volunteer Secchi data to calibrate the model
for each satellite image. Water clarity information was obtained on over 8,000 lakes
statewide between 1999-2001. The DNR continues to analyze data in this way today.
You can learn more at Lakesat.org [exit DNR].
Graphs & Data