California has withdrawn its diesel truck and locomotive emissions regulations. These rules, part of the state’s efforts to combat air pollution and climate change, required phasing out diesel trucks by 2036 and transitioning large fleets to zero-emission models by 2042. Locomotive emissions regulations and other related measures were also withdrawn.
The decision follows delays by the Biden administration in approving the required EPA waivers, which California needs under federal law to enforce stricter emission standards. State officials, concerned about potential legal challenges and reversals under the Trump administration, opted to withdraw the measures to preserve their ability to act in the future.
The move has sparked criticism from environmental groups, who argue it endangers public health, especially in low-income communities disproportionately affected by diesel pollution. Meanwhile, the trucking and railroad industries have opposed the rules, citing high costs and technological challenges.
California air-quality officials have pledged to continue efforts to reduce emissions through voluntary agreements and other strategies, emphasizing the urgent need to address air pollution and climate change. However, future rule-making may be stalled during the Trump administration. Despite this setback, zero-emission truck sales in California have been rising, with companies like Amazon and Pepsi adopting electric and hydrogen fleets.
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