DEEP is excited to be getting back to our new normal consistent with the direction of Governor Lamont and as a result of the rapidly improving COVID-19 situation in Connecticut. Starting no later than June 1, all customer facing services will resume normal business operations. For detailed information for what this means at DEEP and for the public we serve, visit our "New Normal" website: DEEP New Normal Information

Air Permitting and Inventory

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Need Air Permitting Help or Have an Air Permitting Question?
Contact us at or (860) 424-4152
A variety of air quality permits are issued to ensure that emissions from new, modified or existing sources of air pollution do not harm public health or cause significant degradation to air quality.  These permits contain requirements to limit emissions either through control technologies or operational limitations and a means to assure compliance.  The criteria for issuing permits and for defining permit requirements for new or modified facilities are specified in regulations. The DEEP air permit staff who perform the permit reviews and administer the program are available to assist you and answer questions. All permits are issued in accordance with applicable Connecticut and Federal regulations and in accordance with our mission and responsibility to the citizens of Connecticut to protect the environment and public health.


CT Air Regulations
View current CT Air Regulations, SIP Revisions, regulations in development, DEEP comments on federal air regulations and more.
Air Permitting Forms
Download relevant forms for permitting a source of air pollution including New Source Review Permits, General Permits, Acid Rain Permits, Title V Permits and more.

Title V Operating Permit Program
View and download active Title V Permits that have been issued in CT along with the associated NSR permits and air registrations.  View a list of sources who have registered under the current General Permit to Limit Potential to Emit (GPLPE).

Air Permitting Assistance
Request a pre-application meeting, access the CT BACT Database and emission calculators, view DEEP Fact Sheets, permitting assistance documents, relevant federal regulations and emission factors to aid you in preparing your permit application.
Air Technical Support
Stack testing, modeling and CEM forms and assistance along with links to other relevant DEEP programs.
Air Permits FAQ
Frequently Asked Questions regarding all aspects of air permitting.
Contact Us
Contact information for the air permitting group.
SIPRAC is the Air Bureau’s standing advisory committee on Connecticut’s implementation of the Clean Air Act.  View upcoming meeting dates and archived meeting agendas and information.


Content Last Updated: December 21, 2020