With a surface area of 66.9 square miles and a maximum depth over 650 feet, Seneca Lake is the largest of the Finger Lakes. It is also the only Finger Lake into which another Finger Lake – Keuka Lake – drains into. This unique scenario means that more than half of all the surface water in the entire Finger Lakes region is contained within the Seneca Lake watershed.

Seneca Lake, and the Finger Lakes region as a whole, is home to some of New York State’s most agriculturally productive lands. The dairies, crop farms and orchards that once dominated the landscape are now joined by world class wineries and breweries. And amongst the rural landscape; the many towns, villages and cities that are home to industry, academic institutions and cultural amenities. At the center of it all are the Finger Lakes.

But the Finger Lakes are faced with many challenges moving forward. SWIO, along with many others, are now working to ensure that the remarkable natural features at the center of our region’s social and economic identity are safeguarded in perpetuity. 

Here on the website of the Seneca Watershed Intermunicipal Organization (SWIO), you can find information on Seneca Lake watershed environmental issues, projects and events as well as our organization itself. We endeavor to update this site with the latest news and information so check back regularly.