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Photo collage of Sanitation Division

 335 Yaphank Avenue
Room 103
Yaphank, NY 11980

 For General Information, Call 311

Main Office: (631) 852-4188

Sewer Agency: (631) 852-4199

Soutwest Sewer Emergency: (631) 854-4150

Utility Markout - "ONE CALL" - 1-800-272-4480

All Other Districts Emergency: 631-852-4109


The Division of Sanitation oversees, operates, maintains and upgrades 26 Suffolk County owned sewer districts, which includes over 1,250 miles of sanitary gravity sewer and force main piping, 102 sewage pumping stations and 24 wastewater treatment plants throughout the County. These systems are regulated by the New York State Department of Environmental Conservation, the Suffolk County Department of Health Services and a multitude of federal and safety organizations. The sewer plants range in size from 45,000 gallons per day up 40.5 million gallons per day. Tours are available at Districts 3 and 21 (SUNY) by 311.

Projects and Services

Pay My Bill

You now have the option to quickly and securely access your sewer billing account information and pay online. Online access is easy! Click HERE and have your sewer bill available when registering for the first time.

Sewer Agency

The Suffolk County Sewer Agency accepts and processes applications for sewer connections for subdivisions, condominiums, and proposed contractors to existing sewer districts.

Industrial Waste

Suffolk County Department of Public Works Industrial Waste Unit administers a federally approved pretreatment program implementing the federal standards and protecting the County’s sewage collection system and treatment facilities.

Sewer Permits

The Sewer Permits Unit reviews, approves and issues sewer permits. Concurrent Suffolk County Department of Health Services review and approval of plans is also required. All sewer connections must be approved and an S-9 form issued in order to obtain the Department of Health Services’ approval and a Certificate of Occupancy from the respective towns.

Click Here to View the S-9 Form

Click Here for More Information

Sanitary Engineering & Construction

The Sanitation Engineering and Construction Unit administers the design and inspection of capital improvements to sewer district facilities, review and construction inspection of sanitary projects for Sewer Agency and sewer district projects.


Suffolk County Coastal Resiliency Project (SCCRI)
Forge River Watershed Sewer Project
Sewer District No. 3 Expansion Feasibility Study

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