I/A OWTS Requirements

Innovative and Alternative On-Site Wastewater Treatment System (I/A OWTS) Requirements

Town Code Chapter 123 (Building Construction) now includes a requirement for Innovative and Alternative On-Site Wastewater Treatment Systems (I/A OWTS) for certain residential projects: An I/A OWTS approved by the Suffolk County Department of Health Services (SCDHS) is required for residential projects located within the High Priority Area of the CPF Water Quality Improvement Project Plan (WQIPP) for:

  • All new construction
  • Any substantial system upgrade required by the SCDHS
  • An increase in 25% of the floor area of a building
  • When required by the Conservation Board or the Environment Division
  • Verify parcel is located in high priority area

Town Code Chapter 177 provides for Rebates for the installation of I/A OWTS in both Medium and High Priority Areas of the WQIPP for income eligible applicants.

Please contact the Southampton Town Building Department for Electrical Permit Questions Only at (631) 287-5700 and the Southampton Town CPF Office for Rebate Inquiries Only at (631) 287-5720. 

Technical questions related to I/A system installations should be directed to the Suffolk County Office of Wastewater Management at (631) 852-5700 or Septic Improvement Program - Reclaim Our Waters