DEEP: Subsurface Sewage Treatment and Disposal Systems - Septic Systems

Subsurface Sewage Treatment and Disposal Systems
(Septic Systems)

Septic systems treat and disperse wastewater from individual or small numbers of homes and commercial buildings. The type and/or size of the septic system, determines what agency has regulatory authority.

A "conventional subsurface sewage treatment and disposal system" - consists of a house sewer, septic tank followed by a leaching system, any necessary pumps or siphons, and any ground water control system on which the operation of the leaching system is dependent.

A "community subsurface sewage treatment and disposal system" - consists of one subsurface sewage disposal system serving two or more residential buildings, regardless of system size.

An "alternative treatment system" - consists of a sewage treatment system serving one or more buildings that utilizes a method of treatment other than a subsurface sewage disposal system and that involves a discharge to the groundwaters of the state.

Type/Size of System

Contact Information

Systems regulated by the Department of Energy & Environmental Protection (DEEP)

Conventional systems with design flows greater than 7,500 gallons per day, including sites where multiple smaller systems on a single "lot" have a combined flow greater than 7,500 gallons per day.

 DEEP Subsurface Sewage Disposal Program
860-424-3025

Community systems.

 DEEP Subsurface Sewage Disposal Program
860-424-3025

Any system utilizing alternative treatment, regardless of size.

 DEEP Subsurface Sewage Disposal Program
860-424-3025
Systems regulated by the Connecticut Department of Public Health (DPH)

Conventional system with design flow less than 2,000 gallons per day.

Local health department in the town the site is located

Conventional system with design flow greater than 2,000 gallons per day but less than 7,500 gallons per day.

DPH Sewage Program
860-509-7296

Additional Information:

General Permit to Discharge from Subsurface Sewage Disposal Systems Serving Existing Facilities

Individual Permit Application for a Subsurface Sewage Disposal System

Guidance Document for Design of Large-Scale On-Site Wastewater Renovation Systems

Department of Public Health (DPH) - On Site Sewage Disposal

Environmental Protection Agency (EPA) - Septic System Information (includes information for individual homeowners)

Best Management Practices for Non-Domestic Wastewaters Associated with Secondary, Trade and Technical School Facilities

 

Content Last Updated October 12, 2017.