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Genesee River Watershed

Published Water Quality Monitoring and Assessment Reports

Biological Assessment Reports

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.

Watershed Management Plans

Facts about this Watershed

Map of NYS identifying the Genesee River Watershed
Click to view a detailed map of this watershed

The Genesee River Watershed is almost entirely within New York State, except for the upper 15 miles of the river and it drainage which originate in the Allegheny Plateau of Northern Pennsylvania. The river flows north for about 140 miles before emptying into Lake Ontario at Rochester.

Location: Western New York State

  • Most of Livingston and Allegany Counties,
  • Much of Monroe, Genesee and Wyoming Counties,
  • Portion of western Ontario County, and
  • Small parts of Orleans, Steuben and Cattaraugus Counties.

Size: 2,373 square miles of land area within New York State.

Rivers and Streams: 5,048 miles of freshwater rivers and streams. Major tributary watersheds to the 144 miles of the Genesee River in New York State include:

  • Cassadaga Creek (828 river miles)
  • Honeoye Creek (644 miles)
  • Oatka Creek (425 miles)
  • Black Creek (377 miles)

Lakes, Ponds and Reservoirs: 31 significant freshwater lakes, ponds, and reservoirs (13,288 acres), including

  • Conesus Lake (3,208 acres)
  • Mount Morris Reservoir (2,074 acres)
  • Hemlock Lake (2,081 acres)
  • Honeoye Lake (1,797 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 Genesee River Watershed: