Find A Lake > Oconto County > Lake John
Oconto County, 104 Acres
Lake John was monitored by volunteers between 1998 and 2018. Volunteers monitor water clarity with a black and white Secchi disk. Volunteers are the source of the majority of Wisconsin's lake water quality data, and their dedication is greatly appreciated. Reports and graphs featuring data collected by volunteers, DNR staff and others can be viewed below.
Water Quality Reports and Graphs
|Station Name||Station ID||Map||Max Year||Reports|
|John Lake - Deep Hole||433078||Map||2018||Details|