EPA Publishes Final Heavy-Duty Engine And Vehicle Standards


On January 24, 2023, EPA published a final rule intended to reduce air pollution further, including ozone and particulate matter (PM), from heavy-duty engines and vehicles across the United States. 88 Fed. Reg. 4296. According to EPA, the final program includes new emission standards “that are significantly more stringent and that cover a wider range of heavy-duty engine operating conditions compared to today’s standards; further, the final program requires these more stringent emissions standards to be met for a longer period of when these engines operate on the road.” The final rule promulgates new numeric standards and changes key provisions of the existing heavy-duty emission control program, including the test procedures, regulatory useful life, emission-related warranty, and other requirements. EPA also made limited amendments to the regulations that implement its air pollutant emission standards for other sectors (e.g., light-duty vehicles, marine diesel engines, locomotives, and various other types of nonroad engines, vehicles, and equipment).

The final rule is effective on March 27, 2023.

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JDSupra, 06-03-23
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