Legislative Push to Roll Back EPA Diesel Emission Regulations

October 14, 2025 – March 25, 2026

Recent legislative proposals aim to weaken EPA oversight by allowing diesel engine modifications in cold climates and removing penalties for tampering with emissions systems. This narrative reflects a growing push to deregulate diesel technology and limit federal environmental enforcement.

Policies

Rep. Collins Introduces Bill to End Federal Requirements for Vehicle Pollution Control Devices

H.R. 8079

Diesel Engines: Cold Weather Safety Rules

S. 3135

Senate Bill Would Strip EPA's Power to Enforce Diesel Truck Emissions Rules

S. 3007

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