Owasco Lake is the sixth largest of the Finger Lakes. It is located on the south edge of the City of Auburn and contained entirely within Cayuga County. Compared to the other Finger Lakes, Owasco Lake is an intermediate-sized lake. It has a large drainage basin to surface ratio (the larger the basin, the larger the surface inflow, including nutrients), which may account for the high nutrient-loading of Owasco Lake.
Owasco Lake provides drinking water to over 44,000 residents in Cayuga County, including residents within the City of Auburn. Click here to view the Owasco Lake Watershed map.
Owasco Lake Physical Features
Elevation: 712 feet
Area: 10.65 square miles
Shoreline Length: 27 miles
Length: 10.7 miles
Average Width: 1.2 miles
Maximum Depth: 177 feet
Mean Depth: 97 feet
Towns adjacent to the Lake: Fleming, Moravia, Niles, Owasco, Scipio, Venice
Owasco Lake Watershed Features
Area: 205 square miles
Counties: Cayuga (81.5%), Onondaga (2.3%) and Tompkins (16.2%)
Towns within the watershed: Towns of Fleming, Genoa, Locke, Moravia, Niles, Owasco, Scipio, Sempronius, Sennett, Summerhill and Venice in Cayuga County. Towns of Dryden, Groton and Lansing in Tompkins County. Skaneateles in Onondaga County.
Villages within the watershed: Village of Moravia in Cayuga County and Village of Groton in Tompkins County.
Owasco Lake Initiatives
The County received a grant to incorporate the Environmental Protection Agency’s (EPA) Nine Key Elements into the Owasco Lake Watershed Management and Waterfront Revitalization Plan. The Owasco Lake Watershed Nine Element Plan for Phosphorus Reduction was approved in 2022. For more information, visit https://www.cayugacounty.us/1244/Owasco-Watershed-Plan.
Groups involved with protecting Owasco Lake
- Owasco Lake Watershed Inspection and Protection Division Annual Report 2020
- Owasco Lake Watershed Inspection and Protection Division Annual Report 2021
Finger Lakes Partnership for Regional Invasive Species Management Owasco Lake Fact Card
New York State Department of Environmental Conservation Waterbody Inventory/Priority Waterbodies List: Owasco Lake and Tributaries
A Limnological Study of the Finger Lakes of New York (1914): https://digitalcommons.brockport.edu/tech_rep/138/