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Allegheny River WI/PWL

This is the most current Waterbody Inventory/Priority Waterbodies List (WI/PWL) water quality assessment information for the waters of the Allegheny River Basin. The individual waterbody assessment Fact Sheets are based on data and information collected through the 2012 NYSDEC sampling season. Assessments for some waterbodies may have been subsequently updated where appropriate to reflect more recent information.

Allegheny River Basin MapIn 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 HUC 10). Use the map and HUC 10 index below to find, view and download the water quality assessment information of interest to you.

Allegheny River Basin Assessment

The most recent summary assessment of overall water quality in the entire Allegheny Basin was completed in May 2007. This basin summary may not reflect subsequent assessment of some individual waterbodies.

Basin Assessment (PDF, 757 KB) - Includes a brief summary of water quality in the entire basin.

Water Quality Assessment Map (PDF, 895 KB)

Allegheny River Basin HUC 10 Watersheds

Upper Allegheny Sub-Basin (PDF, 209 KB)

  • 0501000112 - Lower Allegheny Watershed
  • 0501000108 - Middle Allegheny Watershed

  • 0501000107 - Great Valley Creek Watershed

  • 0501000106 - Tunungwant Creek Watershed

  • 0501000105 - Upper Allegheny Watershed

  • 0501000104 - Ischua Creek Watershed

  • 0501000103 - Allegheny Headwaters Watershed

  • 0501000102 - Oswayo Creek Watershed

Conewango River Sub-Basin (PDF, 171 KB)

  • 0501000205 - Lower Conewango Creek Watershed
  • 0501000204 - Middle Conewango Creek Watershed

  • 0501000203 - Cassadaga Creek Watershed

  • 0501000202 - Chautauqua Lake Watershed

  • 0501000201 - Upper Conewango Creek Watershed
Brokenstraw Creek Sub-Basin
French Creek Sub-Basin


Assessment Methodology (PDF, 132 KB)

WI/PWL Data Sheet Definitions (PDF, 82 KB)

Index of Waterbodies (PDF, 69 KB) - Alphabetically and by county.

The previous (May 2007) WI/PWL Report for The Allegheny River Basin (PDF, 2.22 MB) is also available.

For 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.