Connecticut Department of Energy & Environmental Protection

DEEP headquarters at 79 Elm Street in Hartford has partially re-opened to staff and members of the public as of Tuesday, February 3. The DEEP records room has re-opened. The DEEP Central Permit Processing Unit (CPPU) will be open to the public starting on Wednesday, Feb. 4. For updates, click here

What is your engine category?

Please click on one of the links below. A corresponding video will play.

 Emergency Compression Ignition  Non-emergency compression ignition, rated between 300 and 500 horsepower
 Non-emergency compression ignition, rated less than or equal to 300 horsepower  Emergency Spark Ignition
 Non-emergency spark ignition 4-stroke lean burn  Non-emergency spark ignition 2-stroke lean burn
 Non-emergency spark ignition 4-stroke rich burn  Non-emergency landfill or digester gas
 Residential, commercial or institutional emergency engine  

 

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