# EPA Freight Emissions Standards

*Last updated: 2026-06-23*

> EPA Freight Emissions Standards are binding federal regulations issued by the U.S.

EPA Freight Emissions Standards are binding federal regulations issued by the U.S. Environmental Protection Agency that cap pollutant and greenhouse gas output from heavy-duty freight vehicles, primarily diesel trucks and tractor-trailers. Regulated substances include nitrogen oxides (NOₓ), particulate matter (PM), carbon monoxide (CO), volatile organic compounds (VOCs), and – under more recent rulemakings – CO₂-equivalents. For carriers and fleet operators active in the United States, compliance requires investment in certified engine and exhaust aftertreatment systems, with conformity demonstrated through type-approval documentation and maintenance records. Although jurisdictionally separate from European Euro emission standards, EPA rules carry global influence because manufacturers selling into the U.S. market must engineer their drivetrains accordingly.

**Source:** [https://www.epa.gov/regulations-emissions-vehicles-and-engines](https://www.epa.gov/regulations-emissions-vehicles-and-engines)

## Quick Facts

| Property | Value |
|---|---|
| Term | EPA Freight Emissions Standards |
| Language | EN |
| Word count | 109 |
| Last updated | 2026-06-23 |
| Source | https://www.epa.gov/regulations-emissions-vehicles-and-engines |

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