Click here for NY 25 Corridor Study Area Click here for Yaphank Study area page click here for Mastic-Shirley Study area page click here for Village of Southampton Study area page click here for Lake Ronkonkoma Hub Study area page click here for Sayville Study area page click here for North Bellport / Bellport Study area page click here for Flanders/Riverside Corridor Study area page

Sewer District Capacity Study

Suffolk County has embarked on studies of areas throughout the County where sanitary sewering can potentially help to support economic development while improving water quality in local communities.


On behalf of Suffolk County Department
of Public Works

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Please refer to the Terms Of Use

The Suffolk County Sewer Capacity Study for Bellport, Sayville, Ronkonkoma Hub, Middle Island Corridor, Mastic/Shirley, Yaphank and Southampton (CP-8189) will evaluate the feasibility of sewering the seven “critical areas of need” that were identified by the Suffolk County Sewer District/Wastewater Treatment Task Force. The study was initiated in the spring of 2011, and is expected to be completed by the end of March 2013. 

Study area-specific Feasibility Studies will be prepared to document sewage collection and treatment needs that are consistent with the needs of each area and the associated costs. The Feasibility Studies will identify those areas where the benefits of sewering outweigh the project costs.  A Generic Environmental Impact Statement (GEIS) will also be prepared to identify the environmental impacts that could result from sewering, as well as potential mitigating measures.

Suffolk County has committed to working together with the study area communities to complete the Feasibility Studies. Meetings will be held in each community, and this website will be used to provide project-related information to all interested stakeholders.

In addition, a separate sewering feasibility study for the Flanders Riverside Corridor (CP 8192) was initiated in November 2011 and is expected to be completed by the end of March 2013. For the convenience of the stakeholders, information for this study has been added to the CP 8189 website.

Documents and study area maps are in .pdf format. To view larger map images, click the map located on each of the study area pages. Get Adobe Reader.