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

A climate advocate is opposing the proposed postponement of Tier 4 emission standards for light and medium-duty vehicles. The commenter argues that delaying these standards will harm public health and increase air pollution in communities.

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.

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.

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.

Ford Motor Company supports the EPA's proposed revisions to the Tier 4 criteria pollutant standards, specifically endorsing the addition of NMOG+NOx bins and the continued use of a Tier 3 Averaging, Banking, and Trading fleet. The company also advocates for regulatory flexibility regarding California OBD requirements and highlights technical challenges related to gasoline particulate filter back pressure.

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.

The Alliance for Automotive Innovation supports the EPA's proposal to extend the Tier 3 emissions program and delay the implementation of Tier 4 standards. They argue that the current EV market growth is slower than anticipated and that manufacturers need more lead time to develop the necessary technologies to meet the more stringent Tier 4 requirements.

The Natural Resources Defense Council, along with several other environmental organizations, opposes the EPA's proposed revision of Tier 4 criteria pollutant standards for light- and medium-duty vehicles. They argue the proposal is an unlawful "rollback" that retroactively weakens standards, violates the Clean Air Act's anti-backsliding mandate, and fails to adequately protect public health from dangerous emissions.