Hartlaub 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 62 (Eutrophic) and was determined using chlorophyll data. For a Deep Headwater lake, this is considered Fair. Deep Headwater lakes stratify, or form separate layers of water, during the summer months and have a watershed area less than 4 square miles.

Hartlaub Lake has been monitored by volunteers since 1996. 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. 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
Hartlaub Lake - Deep Hole	363229	Map	2024	Details
Hartlaub Lake - N side E of public access	10041549	Map	2013	Details
Hartlaub Lake -- Draining To West Lobe	10021085	Map	1996	Details
Hartlaub Lake -- Spring Draining To North Shore	10020550	Map	1996	Details
Hartlaub Lake -- Spring Draining To Sw Corner	10021084	Map	1996	Details