DEEP: Subsurface Sewage Treatment and Disposal Systems

DEEP: Subsurface Sewage Treatment and Disposal Systems - Septic Systems

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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

Fact Sheet for the General Permit to Discharge from Subsurface Disposal Systems Serving Existing Facilities

Individual Permit Application for a Subsurface Sewage Disposal System

Attachment Q: Individual Permit Application Requirements for Large Scale Septic Systems Regulated by the DEEP

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.

Subsurface Sewage Treatment and Disposal Systems(Septic Systems)

Subsurface Sewage Treatment and Disposal Systems
(Septic Systems)