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2018 CWA Section 303(d) List

The process to update the Section 303(d) List for 2018 is currently underway. More information regarding this effort can be found on this page below.

The 2018 CWA Section 303(d) List

As noted above, Section 303(d) of the Federal Clean Water Act(CWA) requires states to compile periodically (every two years) a list of impaired waters that do not meet water quality standards and where designated uses are not fully supported and where a Total Maximum Daily Load (TDML) plan is necessary to address the impairment. A Draft New York State 2018 Section 303(d) List of Impaired/TMDL Waters (PDF, 345 KB) is currently available for public review and comment. Public comment on the List will be accepted for 45 days, through August 6, 2018.

Additionally, the state is required to maintain a Consolidated Assessment and Listing Methodology (CALM) to outline its process for monitoring and assessing the quality of New York State waters, and developing the Section 303(d) List. The CALM consists of two parts:

  • The Assessment Methodology outlines how monitoring data and information is used to evaluate waters, and
  • The Listing Methodology describes how the assessments are used to determine what waters are to be included on the Section 303(d) List.

Public comments regarding the Section 303(d) List and/or the Assessment and Listing Methodologies should be mailed to Sarah Rickard of the Bureau of Watershed Assessment and Management at 625 Broadway, 4th Floor, Albany, NY 12233-3502, or emailed to 4pwlinfo@dec.ny.gov.

In addition to availability on this website, copies of the Draft New York State 2018 Section 303(d) List and/or the revised Assessment and Listing Methodologies can also be requested by contacting the NYSDEC Bureau of Watershed Assessment and Management by mail at the address above, or by phone at 518-402-8179. An electronic version of these documents can also be requested by email to 4pwlinfo@dec.ny.gov.

A complete schedule for updating the List is as follows.

  • June thru September 2017 - Solicitation of the public for existing water quality data and information that may be useful in compiling the 2017 Section 303(d) List.
  • October 2017 thru May 2018 - Review of water quality data and information and development of the Draft 2014 Section 303(d) List for Public Comment.
  • June through July 2018 - Public Notice and Comment Period for the Draft 2018 Section 303 (d) List.
  • August/September 2018 - Review of Public Comments and preparation of Proposed Final 2018 Section 303(d) List.
  • October 2018 - Submittal of Proposed Final 2018 Section 303 (d) List of USEPA.
  • October/November 2018 - USEPA review of Proposed Final 2014 Section 303 (d) List and NYSDEC response to public comments.
  • November 2018 - USEPA approval of Final NYS 2014 Section 303 (d) List.

NYSDEC is also releasing the Draft List of Integrated Report (IR) Category 4a/b/c Waters (PDF, 153 KB) at this time. The waters detailed on this list are impaired, but are excluded from the 303(d) List because a TMDL is not required. Waterbodies are placed in IR Category 4 because a TMDL has already been established (IR Category 4a), an alternative plan is in place (IR Category 4b), or the impairment is due to pollution, not a pollutant (IR Category 4c). The Draft List of Integrated Report (IR) Category 4a/b/c Waters is not part of the public comment process, however comments on the Draft New York State 2018 Section 303(d) List may submitted regarding any waterbody in the State, even if the waterbody has already been assigned to IR Category 4.

Additional information regarding the NYSDEC Water Quality Assessment Program, including the Waterbody Inventory/Priority Waterbodies List assessments and Section 305 (b) water quality reporting can also be found on the NYSDEC website.