NYS Section 303(d) List of Impaired/TMDL Waters
Draft 2020-2022 Clean Water Act Section 303(d) List of Impaired Waters
Every two years, the Federal Clean Water Act and supporting federal regulations require states to submit a list of impaired waters that require the development of a Total Maximum Daily Load (TMDL). Waters that require TMDL development because they do not meet applicable water quality standards and do not support applicable best uses are published, along with the identified pollutant(s), as the Section 303(d) List of Impaired Waters.
On December 29, 2021, DEC announced the availability of the Draft 2020-2022 Clean Water Act (CWA) Section 303(d) List of Impaired/Total Maximum Daily Load (TMDL) Waters. The public comment period was originally 30-days, scheduled to end January 28, 2022. A 15-day extension was noticed on January 19, 2022, and scheduled to end February 11, 2022. An additional extension of the public comment period for 14-days was issued and the public comment period closed on February 25, 2022.
Current 303(d) List
The current 303(d) List in effect is the Final 2018 NYS Section 303(d) List (PDF).
Consolidated Assessment and Listing Methodology
For more information about how water quality assessments are conducted, read the New York State Department of Environmental Conservation's Consolidated Assessment and Listing Methodology (CALM) (PDF).
