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

Morgan Clark opposes the proposed delay of the Tier 4 Criteria Pollutant Standards for light-duty and medium-duty vehicles. He argues that the delay lacks scientific modeling and will lead to significant public health risks, including premature deaths and increased healthcare costs, particularly in underserved communities.

The Illinois Environmental Protection Agency opposes the EPA's proposal to delay the phase-in schedule for Tier 4 emission standards for light-duty and medium-duty vehicles. The agency argues that the EPA's rationale regarding a declining electric vehicle market is unsupported by data in Illinois, which shows continued growth in EV adoption and infrastructure.

William Funari, a private citizen diagnosed with COPD, opposes the EPA's proposal to delay the implementation of Tier 4 air pollution standards for light- and medium-duty vehicles. He argues that these standards are essential for protecting public health, particularly for children and marginalized communities, and that delaying them would lead to increased health costs and preventable deaths.

Mary Ann and Frank Graffagnino, private citizens from Tucson, Arizona, strongly oppose the EPA's proposal to delay the implementation of Tier 4 air pollution standards for light- and medium-duty vehicles. They argue that delaying these standards will harm public health, particularly for children and vulnerable communities, and lead to increased healthcare costs and preventable deaths.

Barbara Allaire, a private citizen, supports the implementation of Tier 4 emissions standards for 2027 vehicle models without delay. She argues that delaying the standards will leave people with respiratory issues, such as herself, vulnerable to harmful particulate matter pollutants.

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.

The commenter supports the proposed action to improve air quality and vehicle efficiency. They argue that reducing air pollution is essential for public health and a better future.

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.

The Union of Concerned Scientists opposes the EPA's proposed delay of the Tier 4 phase-in schedule for light-duty and medium-duty vehicles. They argue that the delay poses a significant threat to public health by increasing harmful emissions and that the necessary emissions control technologies are already available and in production.

The National Parks Conservation Association (NPCA) opposes the EPA's proposal to delay the phase-in schedule for Tier 4 criteria pollutant standards for light-duty and medium-duty vehicles. They argue that the delay violates the Clean Air Act's mandate to achieve the greatest degree of emission reduction and will harm public health, national park visibility, and surrounding ecosystems.