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Lake Champlain Watershed

Published Water Quality Monitoring and Assessment Reports

Biological Assessment Report

Links leave DEC website:

Groundwater Study Reports and Data

The links below go to United States Geological Survey (USGS) web pages. The DEC partners with the USGS to conduct research and publish the following reports and data for groundwater resources of the state. An overview of the monitoring project for the entire state, including links to methods, maps, and publications, can be found on USGS's 305(b) Ambient Groundwater Quality Monitoring webpage.

Other Reports

Lake Champlain Long-term Water Quality and Biological Monitoring Project (leaves DEC website) - A joint NYS, Vermont and Lake Champlain Basin Program project to monitor the biology and water quality of Lake Champlain. Monitoring has been conducted since 1991.

Watershed Management Plans

Facts about this Watershed

Map of NYS identifying the Lake Champlain Watershed
Click to view a detailed map of this watershed

The Lake Champlain Watershed (8,234 square miles) drains the area between the Adirondack Mountains in northeastern New York State and the Green Mountains in northwestern Vermont. The long, narrow and deep lake has its outlet at its northern end where it flows through the Richelieu River into Quebec and empties into the Saint Lawrence River.

Location: Northeastern New York State

  • Most of Clinton County,
  • Much of Essex County,
  • Southwest portion of Franklin County,
  • Eastern portion of Warren County, and
  • Northern portion of Washington County.

Size: 3,050 square miles of land area within New York State.

Rivers and Streams: 4,883 miles of freshwater rivers and streams. Major tributary watersheds to Lake Champlain in New York State:

  • Ausable River (767 river miles)
  • Saranac River (662 miles)
  • Great Chazy River (545 miles)
  • Boquet River (532 miles)
  • Mettawee River (390 miles)
  • Ticonderoga Creek/Lake George (380 miles)

Lakes, Ponds and Reservoirs: Excluding Lake Champlain (278,480 acres), 235 significant freshwater lakes, ponds, and reservoirs (159,302 acres):

  • Lake George (28,523 acres)
  • Upper Saranac Lake (4,844 acres)
  • Lower Saranac Lake (2,145 acres)
  • Lake Placid (1,954 acres)

What You Can Do

Each of us lives in a watershed. On our Watershed Stewardship page are some tips on actions that you and your friends can take to help your watershed.

More about Lake Champlain Watershed: