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Saint Lawrence River WI/PWL

Shows the location of the Saint Lawrence river basins

This is the most current Waterbody Inventory/Priority Waterbodies List (WI/PWL) water quality assessment information for the waters of the Saint Lawrence River Basin. The assessments are based on data and information collected through the 2008 NYSDEC sampling season. Individual assessment Fact Sheets for some waterbodies may have been subsequently updated where appropriate to reflect more recent information.

In order to ease viewing/downloading, this information has been segmented into separate smaller files. Individual water body segment Fact Sheets are grouped together by smaller watershed (10-digit Hydrologic Unit Code, or HUC10 Watershed). Use the map and HUC10 index below to find, view and download the water quality assessment information for the waterbody of interest to you.

A summary assessment of overall water quality in the Saint Lawrence River Basin was completed in February 2009. This basin summary may not reflect more recent reassessment of some individual waterbodies.

Saint Lawrence River Basin (East) HUC10 Watersheds

Shows the watersheds in saint lawrence river basin(east)

Chateaugay/English Sub-Basin
Salmon River Sub-Basin
Saint Regis River Sub-Basin
Raquette River Sub-Basin

Saint Lawrence River Basin (West) HUC10 Watersheds

Shows watersheds in the St lawrence River basin

Grass River Sub-Basin
Upper Saint Lawrence Sub-Basin
Oswegatchie River Sub-Basin
Indian River Sub-Basin
Appendices

Assessment Methodology (PDF) (177 KB)

WI/PWL Data Sheet Definitions (PDF) (74 KB)

Index of Waterbodies (PDF) (102 KB) - Alphabetically and by county.

Saint Lawrence River Basin Assessment

The most recent summary assessment of overall water quality in the entire Saint Lawrence Basin was completed in February 2009. This basin summary may not reflect subsequent assessment of some individual waterbodies.

Basin Assessment (PDF) (955 KB) - Includes a brief summary of water quality in the entire basin.

Water Quality Assessment Map (PDF) (283 KB)

Additional overview and water quality information about the Basin is available on the Saint Lawrence River Watershed page.

Previous WI/PWL Reports

The previous (February 2009) WI/PWL Report for The Saint Lawrence River Basin (PDF, 2.22 MB) is also available.

For additional information and answers to questions about this water quality assessment, please use the contact information at the right to reach us by e-mail, phone or in writing.