Department of Environmental Conservation

D E C banner

Upper Hudson River Watershed

Published Water Quality Monitoring and Assessment Reports

Biological Assessment Reports

Links lead to NYS Library:

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 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.

Watershed Management Plans

Links leave DEC website:

Facts about this Watershed

Map of NYS identifying the Upper Hudson River Watershed
Click image to view a detailed
map of the watershed

The Upper Hudson River Watershed originates in the Adirondack Mountains and flows south to the Hudson River confluence with the Mohawk River at the Troy Dam. The watershed lies primarily in New York State River but also drains a portion of southwestern Vermont and a small part of Massachusetts. The Upper Hudson Watershed makes up about one-third of the larger Hudson River Basin, which also includes the Mohawk River Watershed.

Location: Northeastern New York State

  • Most of Saratoga, Washington and Warren Counties,
  • Much of Essex and Hamilton Counties, and
  • Portions of northern Rensselaer and northeastern Fulton Counties.

Size: 4,620 square miles of land area within New York State

Rivers and Streams: 7,140 miles of freshwater rivers and streams. Major tributary watersheds to the Upper Hudson River:

  • Sacandaga River (1,740 river/stream miles)
  • Schroon River (822 miles)
  • Fish Creek (551 miles)
  • Hoosic River (533 miles)
  • Batten Kill (334 miles)

Lakes, Ponds and Reservoirs: 229 significant freshwater lakes, ponds, and reservoirs (76,940 acres):

  • Great Sacandaga Lake (26,800 lake/reservoir acres)
  • Indian Lake (4,465 acres)
  • Schroon Lake (4,130 acres)
  • Saratoga Lake (4,030 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 Upper Hudson River Watershed:

  • PDF Help
  • For help with PDFs on this page, please call 518-402-8179.
  • Contact for this Page
    Division of Water
    625 Broadway
    Albany, NY
    Send us an email
  • This Page Covers
  • Page applies to all NYS regions