Waterbody Inventory/Priority Waterbodies List
The Waterbody Inventory/Priority Waterbodies List (WI/PWL) is a compilation of water quality information for all individual waterbodies (lakes, rivers, streams, estuaries and coastlines) in the state. The WI/PWL includes the most recent assessment of use support, the identification of water quality problems and sources, and summary of activities to restore and protect each individual waterbody. More information about the WI/PWL and the assessment process is available on this page below the links to the basin assessment reports.
Drainage Basins Assessment Reports
Separate WI/PWL Assessment Reports are maintained for each of the 17 major drainage basins in New York State. For current water quallity assessment information in specific regions of New York State, select a drainage basin of interest from the following list.
- Allegheny River WI/PWL
- Atlantic Ocean/ Long Island Sound WI/PWL
- Black River WI/PWL
- Chemung River WI/PWL
- Delaware River WI/PWL
- Genesee River WI/PWL
- Housatonic River WI/PWL
- Lake Champlain WI/PWL
- Lake Ontario and Minor Tribs WI/PWL
- Lower Hudson River WI/PWL
- Mohawk River WI/PWL
- Niagara River/Lake Erie WI/PWL
- Oswego River/Finger Lakes WI/PWL
- Ramapo River WI/PWL
- Saint Lawrence River WI/PWL
- Susquehanna River WI/PWL
- Upper Hudson River WI/PWL
The WI/PWL Assessment Process
The Waterbody Inventory/Priority Waterbodies List is a statewide inventory that characterizes the quality of the waters of New York State, as well as the status of restoration, protection and other regulatory water programs. A more detailed overview of the goals and objectives of the WI/PWL is available.
The WI/PWL Review and Update Process
The review and update of the WI/PWL assessment information is a continuous process. Waterbody assessments are updated as sampling results and/or other water quality information becomes available. Updates typically align with the DEC's five-year rotating basin schedule. Review of the water quality assessments and participation in the WI/PWL update process is open to the public. The most efficient and effective way to participate in the WI/PWL update process is through the state network of County Water Quality Coordinating Committees. For more information about how to participate, contact either Division of Water Program staff at your DEC Regional Office or the DEC Central Office in Albany.
Other WI/PWL Materials/Resources
Listed below are other materials and resources used in the WI/PWL review and update effort:
WI/PWL Worksheet and Instructions (PDF) (215 KB) is used to capture and submit waterbody-specific information to be considered in the water quality assessments. Instructions on how to complete the worksheet are also included within this document.
An Assessment Methodology (PDF) (511 KB) that outlines what data is considered and how it is evaluated to provide a water quality assessment.
WI/PWL Geographic Information Systems Coverage (leaving NYSDEC Website) that provides shapefiles depicting the location of each water quality assessment unit (i.e., waterbody segment) in the Waterbody Inventory, as well as the most recent water quality assessment information for the segment. Additional information about this GIS dataset, along with usage guidelines and restrictions can be found in the accompanying metadata. (ArcGIS users only)
Google Earth map of the Waterbody Inventory/Priority Waterbodies List that provides links to the Watershed Inventory and Segment Datasheets.
A Waterbody Inventory of specific waterbodies (or assessment units) for drainage basins currently under review.
A WI/PWL Update Schedule that outlines the proposed schedule for the WI/PWL basin review and update process.