DEEP is continuing to carry out its mission and provide services while keeping both the public and our workforce safe during the COVID-19 pandemic. Click here for the latest updates on DEEP's response to COVID-19. DEEP COVID-19 Response

Air Quality

Current News:

COVID-19 Updates

Following the Executive Orders issued by Governor Lamont, DEEP will temporarily close its office locations, including its headquarters at 79 Elm Street, Hartford, effective March 17, 2020 to public visitors as a precautionary measure to mitigate the spread of Coronavirus.

Continuous Emissions Monitoring (CEM)
DEEP is temporarily extending the submission deadline for the 1st Quarter CEM Reports from April 30, 2020, to June 1, 2020. All required monitoring, record keeping, and notification requirements remain in effect during this extension. This action in no way impacts or suspends the requirements of regulated businesses to continue to compile and maintain the emission data, audits, and summaries of corrective action taken. Please read the extension announcement for additional details.

Compliance Reports
DEEP's Air Bureau is encouraging sources, on a temporary basis, to submit all required compliance reports electronically. Title V and GPLPE compliance reports supported and required to be submitted electronically should continue to be submitted using the EMIT online reporting tool. All other compliance reports may be submitted via email at

Fuels Waiver
On March 27, 2020, the Commissioners of the Department of Energy and Environmental Protection and the Department of Consumer Protection issued a joint waiver pertaining the regulatory requirements of Reid Vapor Pressure. Please see full waiver for further details.

For more information refer to: Air Current News

Air Quality Forecasts and Monitoring
Air quality is monitored through real time, direct measurements of our ambient air, and is forecasted using complex models to predict future air quality events.  The Agency utilizes both of these methods to protect public health and plan for long term air quality control.  Learn more about the air quality forecast, measuring air quality in Connecticut, and the health effects of air pollution.

Air Quality Planning
Air quality planning is an iterative process that incorporates detailed modeling analyses, assessments of air pollution sources such as mobile sources, continual evaluation of federal and state regulations and creative strategies to address air pollution outside the scope of regulations. Learn more about the sources of air pollution and the strategies to improve air quality in Connecticut, including regulatory programs, incentives and more.

Compliance Assurance
DEEP’s air compliance assurance program utilizes source monitoring, inspection, report review, administrative enforcement and a variety of other tools to ensure that the operation of sources of air pollution and related activities comply with all applicable orders, permits, the Connecticut General Statutes, and the Regulations of Connecticut State Agencies. Learn more about the compliance assurance program, download reporting forms and more.

Outreach and Education
Outreach and education is important for both informing the public of the Bureau's data, policy and other planning efforts and, informing the Bureau of the public's perception, needs and other related expertise. Find information about the Bureau's regular stakeholder meeting (SIPRAC), special events, fact sheets, webinars and more.

Permitting and Inventory
Download emissions statement guidance, permit forms, Title V permits, modeling guidance and more.

The Radiation Division sets standards for the safe operation of equipment that produces radiation and for the possession, use, storage, transportation and disposal of radioactive material. The division inspects facilities that use radioactive material, x-ray machines and other radiation producing devices and is responsible for responding to reports of accidents and incidents involving radioactive materials. of radiation, emergency response, how to register your emitting devices and more.

Contact Us 

Do you have a technical question regarding air permitting?
Please call the Engineer of the Day at 860-424-4152

Would you like to file a complaint about odors or an air pollution source?
Please call the Air Complaint Line at 860-424-3436 or email


Do you have another air related question?

Please call 860-424-4152


Content Last Updated March 30, 2020