Lac La Belle

Water Quality

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 47 (Mesotrophic) and was determined using chlorophyll data. For a Two-Story lake, this is considered Good.

Lac La Belle has been monitored by volunteers since 1986. Volunteers monitor water clarity with a black and white Secchi disk. Some also collect water samples, which are sent to the State Lab of Hygiene to be analyzed. Volunteers are the source of the majority of Wisconsin's lake water quality data, and their dedication is greatly appreciated. Lac La Belle 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 and Aquatic Invasive Species 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
Lac La Belle - Deep Hole-Site 1	683125	Map	2024	Details
Lac La Belle - Lake Lac La Belle	132	Map	1976	Details
Lac La Belle - Nw Basin-Site 2	683171	Map	2024	Details
Lac La Belle - SE Basin Deep Hole - Site 3	683390	Map	2022	Details
Lac La Belle at Oconomowoc WI	10039836	Map	2003	Details
Lac LaBelle Central Basin	10041748	Map	1992	Details