Department of Environmental Conservation

D E C banner

2018 CWA Section 303(d) List

The 2018 CWA Section 303(d) List

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. Public comments on the Draft New York State 2018 Section 303(d) List of Impaired/TMDL Waters (PDF) were accepted through August 6, 2018. DEC is currently preparing a response to comments received.

The Draft 2018 List of Integrated Report (IR) Category 4a/b/c Waters (PDF) details waterbodies that 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.


  • Important Links
  • PDF Help
  • For help with PDFs on this page, please call 518-402-8179.
  • Contact for this Page
  • NYSDEC
    Division of Water
    625 Broadway
    Albany, NY
    12233-3502
    518-402-8179
    Send us an email
  • This Page Covers
  • Page applies to all NYS regions