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SB 315

AN ACT DECOUPLING THE STATE'S LIGHT DUTY MOTOR VEHICLE EMISSION STANDARDS FROM THE STANDARDS OF CALIFORNIA.

2025 Regular Session Introduced by Rob Sampson

Connecticut bill would allow state to abandon California's vehicle emission standards and establish weaker independent requirements, likely increasing air pollution and healthcare costs.

REF. TO JOINT COMM. ON Environment
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Bill Summary · SB 315

Legislative bill overview

SB 315 would allow Connecticut to set its own vehicle emission standards for light-duty vehicles rather than automatically adopting California's standards. Currently, Connecticut follows California's more stringent emission requirements under a provision of the Clean Air Act. This bill would give the state independence to establish alternative emission benchmarks.

Why is this important

Vehicle emission standards directly affect air quality, public health outcomes, and the automotive market operating in the state. Connecticut's decision to decouple from California's standards would likely result in weaker emission controls, potentially increasing air pollution and health costs, while also creating market complexity as manufacturers would need to meet different standards across states. This represents a significant shift in the state's environmental policy direction.

Potential points of contention

  • Environmental impact: California's standards are designed to combat climate change and air pollution; weakening them could increase emissions, respiratory illness, and healthcare costs
  • Economic consequences: Auto manufacturers prefer uniform standards; fragmented standards could increase vehicle costs and limit consumer choice in Connecticut
  • Interstate coordination: Multiple states have adopted California standards; decoupling creates regulatory inconsistency and may undermine regional air quality improvements
  • Clean Air Act compliance: Connecticut may face legal or federal funding questions regarding its obligations under existing air quality frameworks

Compiled from official sources — confirm details with the bill’s official record.

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