Tier 4 Criteria Pollutant Standards, Part 1: Phase-In Schedule for Light-Duty and Medium-Duty Vehicles

Mikayla Williams is writing to express concern over the proposal to postpone the implementation of Tier 4 criteria pollutant standards for vehicles. She argues that delaying these standards will allow preventable pollution to continue and urges the EPA to prioritize public health by withdrawing the delay.

Matthew Nigro, representing the American Lung Association, opposes the EPA's proposed delays and weakenings of the Tier 4 light- and medium-duty vehicle standards. He argues that traffic pollution poses significant health risks, particularly to children, and that delaying the adoption of effective emission-reduction technology will harm public health.

A retired Nurse Practitioner supports the proposed Tier 4 standards and opposes the delay in their implementation. The commenter argues that the human health costs of transportation emissions, particularly for those with respiratory illnesses, outweigh the costs to the industry.

Atid Kimelman of the Natural Resources Defense Council (NRDC) is submitting an additional attachment in support of comments from environmental and public health organizations. The submission provides an emissions and health impacts analysis regarding the proposed revision of Tier 4 criteria pollutant standards for light-duty and medium-duty vehicles.

Dr. Jaime E. Mirowsky, a researcher at the University of North Carolina School of Medicine and the EPA, submitted a scientific study regarding the differential expression of pro-inflammatory and oxidative stress mediators induced by nitrogen dioxide and ozone. The document provides experimental data on how these pollutants affect human bronchial epithelial cells but does not take a specific position on the proposed vehicle emission standards.

Paul G. Billings, a private citizen, opposes the proposed delay in the phase-in schedule for light-duty and medium-duty vehicle pollutant standards. He argues that the delay ignores the severe health risks associated with particulate pollution and that the required technology (gasoline particulate filters) is already widely available and effective.

A group of 14,000 Black church leaders and congregants is urging the EPA not to delay the enforcement of light-duty vehicle (LDV) criteria pollutant rules. They argue that these regulations are essential for protecting public health, particularly in Black communities that disproportionately bear the burden of tailpipe pollution.

Sister Mary Kevin Rooney expresses support for the Tier 4 Vehicle Emission Standards, arguing that the EPA must protect public health from pollutants like nitrogen oxides and particulate matter. She emphasizes the risks these pollutants pose to individuals with pre-existing heart and lung conditions.

Denis Mahoney, a private citizen, opposes the proposed delay of the Tier 4 Vehicle Emission Standards. He argues that the EPA must not delay these standards to protect public health from vehicle-related pollution.

A senior physician and reproductive endocrinologist supports the proposed phase-in schedule for vehicle pollutant standards. They argue that delaying these standards would increase exposure to ozone and particulate matter, which are linked to diminished fertility and poorer pregnancy outcomes.