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a dock underneath the words 'The Subwatersheds Wastewater Plan'

In response to the growing water quality crisis facing our county, the Suffolk County Department of Health Services has developed an historic solution to address nitrogen pollution through the development of a countywide wastewater upgrade strategy. A Reclaim Our Water initiative, the strategy is documented in the Suffolk County Subwatersheds Wastewater Plan (SWP), which was developed in partnership with the Long Island Nitrogen Action Plan (LINAP) and in collaboration with numerous project partners, stakeholders, and technical experts. The SWP is the product of years of intensive research, documentation, modeling, and evaluation of all of Suffolk County’s water resources and provides a parcel-specific roadmap on how to address the nitrogen crisis through wastewater upgrades and other nitrogen pollution mitigation strategies. The plan seeks to arrest and reverse the existing trend of degrading water quality over a 10 year period by transitioning away from reliance on conventional cesspools and septic systems, which are the primary source of nitrogen pollution that has fouled local bays.

The Draft SWP was released in August 2019, along with a Draft Generic Environmental Impact Statement (DGEIS) for the actions proposed in the SWP, which was subject to a two month public comment period. A revised SWP and a Final Generic Environmental Impact Statement (FGEIS) incorporating public comments and comments received by the Suffolk County Council on Environmental Quality (CEQ) was posted in February 2020. The FGEIS and related State Environmental Quality Review (SEQRA) documents are available below.

After minor revisions, the New York State Department of Environmental Conservation (NYSDEC) has also approved the Suffolk County SWP as a Nine Element (9E) Watershed Plan. The 9E program is designed to encourage municipalities to develop watershed based plans for improving water quality including nine key elements (refer to the NYSDEC website for more details on 9E plans). “The County’s 9E Plan is the first of its kind, as it addresses nitrogen pollution throughout an entire county.” said James M. Tierney, Deputy Commissioner of the NYSDEC. This historic first will open the County’s watersheds up for additional State and Federal funding opportunities to advance water quality improvement initiatives.

The final SWP incorporating minor revisions to satisfy the requirements of the 9E Watershed Plan program was published in July 2020. Please click on the following links to download the full July 2020 SWP and appendices, and obtain additional information on the SWP:

Click here to download the final July 2020 SWP.

Click here to download the final July 2020 SWP Appendices (> 600MB File).

Please click on the following links to download the FGEIS and Statement of Findings for the SWP:

Click here to download the February 2020 Statement of Findings.

Click here to download the February 2020 Final Generic Environmental Impact Statement (FGEIS).

Suffolk County Government

H. Lee Dennison Bldg

100 Veterans Memorial Hwy
P.O. Box 6100
Hauppauge, NY 11788

Riverhead County Center

County Road 51
Riverhead, NY 11901