Paccar, Cummins, and Daimler’s support for weakened implementation of the heavy duty NOx emissions standards contradicts their public commitments to cleaner technologies

Twenty-four environmental, health, and labor organizations are calling on Paccar, Cummins, and Daimler to reverse their support for rollbacks of the EPA's heavy-duty NOx emissions standards. The authors argue that these companies are contradicting their own public commitments to investors regarding their readiness for 2027 standards. The statement highlights that heavy-duty vehicles account for 59% of the transportation sector's NOx emissions and 55% of its particulate pollution, disproportionately impacting drivers and communities near highways and ports. The organizations assert that the necessary technology, such as selective catalytic reduction (SCR) and aftertreatment systems, is already proven and used in markets like Europe and China.

• Heavy-duty vehicles have a disproportionate impact on pollution, representing only 6% of the on-road fleet but accounting for 59% of the transportation sector's NOx emissions and 55% of its particulate pollution.
• Paccar, Cummins, and Daimler have publicly stated their readiness for 2027 NOx standards in investor communications, contradicting their current support for weakening those same standards.
• The technology required to meet the 2027 standards, specifically evolutions of selective catalytic reduction (SCR) and aftertreatment systems, is already established and exported to markets in China and Europe.
• Diesel pollution creates significant health risks for truck drivers due to 'in-cabin pollution,' leading to higher mortality rates from lung cancer compared to unexposed workers.

APA

GreenLatinos (2026). Paccar, Cummins, and Daimler’s support for weakened implementation of the heavy duty NOx emissions standards contradicts their public commitments to cleaner technologies. https://www.greenlatinos.org/wp-content/uploads/2026/07/OEM-NOx-Letter-from-Advocates.pdf

Chicago

GreenLatinos. Paccar, Cummins, and Daimler’s support for weakened implementation of the heavy duty NOx emissions standards contradicts their public commitments to cleaner technologies. 2026. https://www.greenlatinos.org/wp-content/uploads/2026/07/OEM-NOx-Letter-from-Advocates.pdf.

Wikipedia

{{cite press release |author=GreenLatinos |title=Paccar, Cummins, and Daimler’s support for weakened implementation of the heavy duty NOx emissions standards contradicts their public commitments to cleaner technologies |date=20 July 2026 |url=https://www.greenlatinos.org/wp-content/uploads/2026/07/OEM-NOx-Letter-from-Advocates.pdf |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

@misc{greenlatinos2026paccar, author = {{GreenLatinos}}, title = {{Paccar, Cummins, and Daimler’s support for weakened implementation of the heavy duty NOx emissions standards contradicts their public commitments to cleaner technologies}}, publisher = {GreenLatinos}, year = {2026}, month = jul, url = {https://www.greenlatinos.org/wp-content/uploads/2026/07/OEM-NOx-Letter-from-Advocates.pdf}, urldate = {2026-10-23}, note = {Indexed by Climate Insights Directory} }