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Contact information
For information on Lakes in Wisconsin, contact:
Wisconsin DNR Lakes
Division of Water
Bureau of Water Quality
Water Quality Contacts

Water Quality

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 Disk".

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


Last Revised: Monday, December 16, 2013