Find A Lake > Bayfield County > Hart Lake
Bayfield County, 257 Acres
One measure of a lakes health is the trophic state, which relates to the amount of algae in the water. The average summer trophic state for the last 5 years was 37 (Oligotrophic) and was determined using satellite water clarity observations data. For a Deep Seepage lake, this is considered Excellent. Deep Seepage lakes stratify, or form separate layers of water, during the summer months and have no inlet or outlet.
Hart Lake has been monitored by volunteers since 1993. 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. Hart Lake is also part of DNR's long term trend monitoring project. Additional monitoring has been done through projects funded in part by DNR Lake Grants. 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|
|Hart Lake (T47n R08w S27) - Deep Hole||043079||Map||2019||Details|
|Hart Lake - Hart Lake||044013||Map||1979||Details|
|Hart Lake - North End of Lake||10048189||Map||2017||Details|
|Hart Lake - South End of Lake||10048190||Map||2017||Details|