Connecticut Department of Energy & Environmental Protection

Air Emissions Permits and General Permits

Applicants shall submit all air permit applications/forms by hard copy, with required fees, as directed on the relevant forms and submit an electronic copy of such application/forms to DEEP.BAM.AirPermits@ct.gov. Where the file size of attachments exceed the allowable limit, please contact DEEP.BAM.AirPermits@ct.gov to arrange an alternate method of submitting the electronic copy.

License Revocation Request Form

To request a revocation of a New Source Review Permit, Title V Permit, Title IV Permit, or a Registration issued under the former RCSA section 22a-174-2.

Permit Type Application Forms Instructions Required Common Forms / Related Forms Other Related Information
License Revocation Request
Application
12/01/25
12/01/25
 Written Authorization Form N/A

New Source Review (NSR) Stationary Sources of Air Pollution Permit Application

Permit Type and Related Information Application Forms Instructions Required Forms Other Related Information
Minor Modification Application for an Existing New Source Review Permit
Application
Word,  PDF
12/01/25
Instructions
12/01/25
 No Required Forms N/A
Revision Application for an Existing New Source Review Permit
(DEEP-NSR-APP-200R)
Application
 Word, PDF
12/01/25
12/01/25
 No Required Forms N/A
Permit Application for Stationary Sources of Air Pollution - New Source Review (NSR)
(DEEP-NSR-APP-200)
Note: Depending on your proposed activity, you will need to use the main NSR form listed here and you will need to download one or more of the supporting documents listed below.
Application

Word,  PDF
12/01/25
Instructions
12/01/25
Attachment A - Executive Summary
(DEEP-NSR-APP-222)
 Application
Word,  PDF
03/29/13
 incorporated in main instructions (DEEP-NSR-INST-200) N/A
Attachment B - Applicant Background Information
(DEEP-APP-008)
DEEP form; Refer to the main instructions (DEEP-NSR-INST-200)
N/A
Attachment C - Site Plan
No DEEP form; Refer to the main instructions (DEEP-NSR-INST-200)
N/A
Attachment D - USGS Map Attach a topographic map showing the site. Refer to the main instructions (DEEP-NSR-INST-200) N/A
Attachment E - Supplemental NSR Forms Forms 201 through 209- Attach the appropriate form based on the type of operation or equipment.
Manufacturing or Processing Operations
(DEEP-NSR-APP-201)
 Application
Word, PDF
03/29/13 		Instructions
03/29/13 		N/A
Anaerobic Digesters
(DEEP-NSR-APP-201A)
 Application
Word,  PDF
01/18/23 		Instructions
01/18/23 		Multi-Media Farm-Based Anaerobic Digesters Comprehensive Program Permitting Factsheet
Fuel Burning Equipment
(DEEP-NSR-APP-202)
 Application
Word,  PDF
03/29/13 		Instructions
03/29/13 		N/A
Incinerators or Flares
(DEEP-NSR-APP-203)
Application
Word,  PDF
1/18/23
Instructions
 1/18/23
N/A
Crematory Units
(DEEP-NSR-APP-203A)
Application
Word , PDF
10/31/18
Instructions
10/31/18
Default Mercury Emission Factors for Permit Reviews
05/08/19
Volatile Liquid Storage
(DEEP-NSR-APP-204)
Application
Word, PDF
03/29/13 
Instructions
03/29/13
N/A
Surface Coating or Printing Operations
(DEEP-NSR-APP-205)
Application
Word, PDF
01/13/14
Instructions
01/13/14
N/A
Metal Plating or Surface Treatment Operations
(DEEP-NSR-APP-206)
   Application
Word, PDF
03/29/13
Instructions
03/29/13
 
N/A
Metal Cleaning Degreasers
(DEEP-NSR-APP-207)
  Application
Word, PDF
03/29/13
Instructions
03/29/13
N/A
Concrete, Asphalt Concrete, Mineral Processing or Other Similar Equipment
(DEEP-NSR-APP-208)
   Application
Word, PDF
03/18/14
Instructions
03/18/14
N/A
Site Remediation Equipment
(DEEP-NSR-APP-209)
  Application
Word, PDF
03/29/13
 Instructions
03/29/13
 
N/A
Air Pollution Control Equipment
(DEEP-NSR-APP-210)
  Application
Word, PDF
03/07/23
Instructions
03/07/23
 
N/A
Stack Parameters
(DEEP-NSR-APP-211)
    Application
09/08/14
 Instructions
09/08/14
N/A
Unit Emissions
(DEEP-NSR-APP-212)
 Application
Word, PDF
02/26/25
Instructions
02/26/25
 
(Please "SAVE" then open these files - Be sure to enable macros before use)
Attachment F - Premises Information Form
(DEEP-NSR-APP-217)
Application
Word, PDF
04/25/13
Instructions
04/25/13
 
N/A
Attachment G - Analysis of Best Available Control Technology
(DEEP-NSR-APP-214a)
  Application
Word, PDF
03/29/13
Instructions
03/29/13
N/A
Note:  Depending on your BACT analysis determined by completing Attachment G, you will need to complete one or more of the following BACT forms listed below. Refer to the BACT Determination instructions (DEEP-NSR-INST-214)
Attachment G1 - Background Search - Existing BACT Determination
(DEEP-NSR-APP-214b)
Application
Word, PDF
03/29/13
Instructions
03/29/13
 
N/A
Attachment G2 - Cost/Economic Impact Analysis
(DEEP-NSR-APP-214c)
Application
Word, PDF
03/29/13
Instructions
03/29/13
 
N/A
Attachment G3 - Summary of Best Available Control Technology Review
(DEEP-NSR-APP-214d)
Application
Word, PDF
11/05/13
 
Instructions
03/29/13
 N/A
Attachment H - Major Modification Determination Form
(DEEP-NSR-APP-213)
  Application
Word, PDF
06/28/23

Instructions
06/28/23
N/A
Attachment I - Prevention of Significant Deterioration (PSD) of Air Quality
(DEEP-NSR-APP-216)
  Application
Word, PDF
06/28/23
 
Instructions
06/28/23
 N/A
Attachment J - Non-Attainment Review Form (DEEP-NSR-APP-215)
  Application
Word, PDF
06/28/23
 

Instructions
06/28/23

 
N/A
Attachment K - Operation and Maintenance Plan
No DEEP Form;  Refer to the main instructions (DEEP-NSR-INST-200)
N/A
Attachment L - Ambient Impact Analysis Form (DEEP-NSR-APP-218)
Application
Word, PDF
07/27/23

Instructions
07/27/23

 
Related Guidance
(DEEP-APP-002)
DEEP form; Refer to the main instructions (DEEP-NSR-INST-200)
N/A
Attachment N - Marked Up Revised/Modified Permit
No DEEP form; Refer to the main instructions (DEEP-NSR-INST-200)
N/A
Attachment O -  Coastal Consistency Review Form (DEEP-APP-004)
DEEP form; Refer to the main instructions (DEEP-NSR-INST-200)
N/A
Attachment P - Copy of the completed Request for NDDB State Listed Species Review Form (DEEP-APP-007) and the NDDB response
DEEP form; Refer to the main instructions (DEEP-NSR-INST-200)
N/A
Attachment Q - Conservation or Preservation Restriction
No DEEP form; Refer to the main instructions (DEEP-NSR-INST-200)
N/A
Attachment R -  Copy of the Written Environmental Justice Public Participation Plan Approval Letter
No DEEP form; Refer to the main instructions (DEEP-NSR-INST-200)
N/A

General Permits

On November 8, 2020, the General Permit to Limit Potential to Emit from Major Stationary Sources of Air Pollution (GPLPE) expired.  The GPLPE was not reissued.  Instead, the concepts of the general permit have been incorporated into  RCSA section 22a-174-33a and  RCSA section 22a-174-33b. To notify the department of operation and/or cessation of operation under RCSA sections 22a-174-33a and -3b, please complete the appropriate notification forms available on the  Air Compliance Assurance Forms Webpage.

Permit-by-Rule Notification Forms

To notify the DEEP that you elect coverage under a permit-by-rule regulation.

Notification Type Forms / Location
Notification of Coverage under RCSA section 22a-174-3d
Combined Heat and Power Systems (CHP) Systems
Notification Forms available on the Air Compliance Assurance Forms Webpage
Notification of Operation and/or Cessation of Operation
Under RCSA sections 22a-174-33a & 33b
Revision Application for a Title V or Title IV Permit
(DEEP-TV-APP-100R)
03/18/24
Required Common Forms
Related Forms
Minor Modification Application for an Existing Title V Permit
(DEEP-TV-APP-100MM)
03/18/24
Required Common Forms
Related Forms
Non-Minor Application for an Existing Title V Permit
(DEEP-TV-APP-100NMM)
 
 
03/18/24
Required Common Forms
Related Forms
New Title V Permit or Renewal of an Existing Title V Permit Application
(DEEP-TV-APP-100)
Note: You will need to use the main form listed here and you will need to download the supporting documents listed below. Review the main instructions for a summary of which supporting documents and attachments must be submitted.
   
08/23/23
Required Common Forms
Related Forms
 
Supporting Documentation (Attachments A, C, D, D2, E, G) for the Title V Permit Application
Title V - Attachment A: Executive Summary
(DEEP-TV-APP-105)
  instructions within main instruction 01/29/14
N/A
Title V - Attachment C: Operating Scenario General Information
(DEEP-TV-APP-101)
instructions within main instruction 01/29/14
N/A
Title V - Attachment D: Emissions Unit Information Within Operating Scenarios
(DEEP-TV-APP-102)
instructions within main instruction 01/29/14
N/A
Title V - Attachment D2: Generally Applicable Requirements
(DEEP-TV-APP-102B)
  instructions within main instruction 01/03/13
N/A
Title V - Attachment E: Total Regulated Air Pollutants Emitted Within Operating Scenarios
(DEEP-TV-APP-103)
instructions within main instruction 01/03/13
N/A
Title V - Attachment G: Title V Compliance Plan
(DEEP-TV-APP-104)
instructions within main instruction 01/03/13
N/A
Title IV Acid Rain Permit Application
Title IV Acid Rain
(DEEP-TIV-APP-100)
Note:  Use the Title IV Application Transmittal Form (DEEP-TIV-APP-100) to submit an application for a new, or initial, Title IV permit. Attach a completed EPA Phase II Acid Rain Permit Application to the completed Title IV Application Transmittal Form (DEEP-TIV-APP-100).
If you are applying for a renewal or a revision to an existing Title IV permit, please use the appropriate Renewal Application Form (DEEP–TV-APP-100) or Revision Application Form (DEEP-TV-APP-100R).
Title IV Application Transmittal Form
Title IV Application Transmittal Form Instructions
06/10/19
Required Common Forms

Clean Air Interstate Rule (CAIR)

Permit Type and Related Information Application
Forms		 Instructions Last Revised Required Common Forms
and Other Related Forms
Clean Air Interstate Rule (CAIR)
   
10/01/25
 N/A

Radiation

The future of Diagnostic and Therapeutic X-Ray Registration (DTX) and Radioactive Material and Industrial X-Ray (RMI) Registration is here! The Radiation Division is proud to announce their new on-line system to submit your DTX or RMI registration. To submit one of the following registrations, please refer to the Radiation web page for details.
Permit Type and Related Information
Diagnostic and Therapeutic X-Ray Devices (Medical X-Ray) Registration
Temporary Use Notification (for a registered vendor of diagnostic and therapeutic x-ray rdevices  planning to make a site visit within Connecticut)
Radioactive Materials and Industrial Device Registration (Ionizing Radiation)
Temporary Use Notification (for an out of state registrant of radioactive and industrial x-ray devices planning to make a site visit within Connecticut)

Air Compliance, Monitoring and Reporting  |  Air Permitting

Permits and License

Content Last Updated December 12, 2025