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For information on Lakes in Wisconsin, contact:
Wisconsin DNR Lakes
Division of Water
Bureau of Water Quality
DNR Contacts for Long Lake

Long Lake Preservation Association [exit DNR]

Find A Lake > Washburn County > Long Lake

Long Lake
Washburn County, 3478 Acres


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 54 (Eutrophic) and was determined using chlorophyll data. For a Two-Story lake, this is considered Poor.

Long Lake has been monitored by volunteers since 1991. 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 NameStation IDMapMax YearReports
Long Lake (T37r11ws10) - Site C663090Map2018Details
Long Lake (T38r11ws35) - Site B663089Map2000Details
Long Lake - Deep Hole/Site A663088Map2019Details
Long Lake - Near Slim Creek663061Map2001Details
Long Lake - Nr Little Mud Lk Outlet663063Map2001Details
Long Lake - Site D 663091Map2018Details
Long Lake - Site E 663092Map2019Details
Long Lake - Site F663118Map2018Details