Spooner 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 49 (Mesotrophic) and was determined using chlorophyll data. For a Shallow Lowland lake, this is considered Excellent. Shallow Lowland lakes do not stratify, or form separate layers of water, during the summer months and have watersheds greater than 4 square miles in area.

Spooner Lake has been monitored by volunteers since 1948. 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
Spooner Lake - Deep Hole	663153	Map	2025	Details
Spooner Lake - Near South Island	663154	Map	2019	Details
Spooner Lake center of south bay	10037936	Map	2004	Details
Spooner Lake near entrance to south bay	10037937	Map	2002	Details
Spooner Lake south near wetland area	10037934	Map	2002	Details
Spooner Lake south of large island	10037938	Map	2002	Details
Spooner Lake south part of south bay	10037935	Map	2002	Details
Spooner Lake ~ 750 ft south of Deep Hole	10037939	Map	2002	Details