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Spring Lake
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 44 (Mesotrophic) and was determined using Secchi data. For a Deep Lowland lake, this is considered Excellent. Deep Lowland lakes stratify, or form separate layers of water, during the summer months and have watersheds greater than 4 square miles in area.
Spring Lake has been monitored by volunteers since 2002. 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. Additional monitoring has been done through projects funded in part by DNR 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 |
|---|
| Legend Lake - Main Channel (Herbicide Monitoring Site 1) | 10042203 | Map | 2014 | Details |
| Legend Lake - Spring (Herbicide Monitoring Site 1) | 10042200 | Map | 2017 | Details |
| Legend Lake - Spring (Herbicide Monitoring Site 2) | 10042201 | Map | 2014 | Details |
| Legend Lake - Spring (Herbicide Monitoring Site 3) | 10042202 | Map | 2017 | Details |
| Legend Lake - Spring Basin Deep Hole | 403107 | Map | 2024 | Details |
| Legend Lake - Spring E (Herbicide Monitoring Site Spr2) | 10043844 | Map | 2015 | Details |
| Legend Lake - Spring E Center (Herbicide Monitoring Site Spr1) | 10043843 | Map | 2022 | Details |