Connecticut Mobile Sources regulations & environmental compliance analysis

Connecticut Mobile Sources: What you need to know

Governing Law and Regulations

Vehicle inspection and maintenance (I/M): 22a-174-27 Regulations of Connecticut State Agencies (RCSA)

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Automotive emissions standards:

Low emissions vehicles (LEV): 22a-174-36 RCSA

LEV II: 22a-174-36b RCSA

LEV III: 22a-174-36c RCSA

Heavy-duty vehicle emissions standards:

Heavy-duty diesel engines: 22a-174-36a RCSA

Employer trip reduction and commuting:

Employer trip reduction: 42 USC 7511a(d)(1)(B)


Gasoline volatility: 22a-174-20(a)(11) RCSA

Oxygenated gasoline: 22a-174-28 RCSA

Regulatory Agencies

Connecticut Department of Energy and Environmental Protection (DEEP) Environmental Protection Bureau of Air Management

Connecticut Department of Motor Vehicles (DMV)

Connecticut Department of Transportation (DOT)

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. There are many mobile source regulatory requirements implemented nationally by the U.S. Environmental Protection Agency (EPA) that impact mobile sources in Connecticut. In addition, the state has established programs to implement optional federal programs and state-specific requirements to control mobile source emissions and make progress toward attainment of all the national ambient air quality standards.

Administration and enforcement. The DEEP administers and enforces the majority of the mobile source requirements in Connecticut. The DEEP and the DMV jointly administer and enforce the state's vehicle I/M program. The DOT assists commuters by supporting various commuting options.

State Requirements


22a-174-27 RCSA

Connecticut's I/M program includes inspection exemptions and waivers.

Inspection Area and ...

Read more about Mobile Sources

More on this topic:

Governing Law and Regulations
Regulatory Agencies
Comparison: State vs. Federal
State Requirements

Connecticut Mobile Sources Resources

Type Title
Forms Stage II System Decommissioning Notification Form
See all Mobile Sources Resources