Air

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• Air Permitting and Inventory

• Source Emissions Monitoring

  Learn about DEEP's Source Emissions Monitoring (SEM) group which oversees the stack, CEMS performance testing, and RATA programs. The SEM group works to determine actual pollutant emissions from stationary sources of air pollution and compliance with air pollution limits for both state and delegated federal standards.

• Fueling Mobile Sources

  Mobile sources in Connecticut typically burn gasoline or diesel fuel, but new vehicle technologies allow vehicles to operate with zero or low emissions by utilizing electricity or renewable fuels to power the vehicle. Learn more about Fuels in CT!

• Air Compliance Assurance - Other Programs

  Learn about emission sources such as idling motor vehicles, open burning, outdoor wood burning furnaces (OWFs), gasoline dispensing facilities (GDFs) and more.

• RGGI Offsets: Application Forms and Instructions

• Air Quality Index

• Historical Meteorological Data

• Mobile Source Emissions Modeling

• Mercury Air Emissions

• MARAMA Emissions Inventory

• Unusual and Exceptional Events

• Particulate Matter

• PM2.5 Planning Efforts: Attainment Designations

• Greenhouse Gas (GHG) Permitting

• SO2 Planning Efforts