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States Eye Adopting CARB Truck NOx Standards Due To EPA Rule Delay

October 3, 2019
Several East Coast states say they might adopt the California Air Resources Board’s (CARB) planned low-nitrogen oxide (NOx) standards for heavy-duty trucks starting in model year 2024-26, given uncertainty over the effectiveness of EPA’s plan to adopt new national standards starting in MY27. The states’ declarations may ramp up pressure on EPA and truck engine manufacturers to reach a compromise with CARB on one set of national standards to avoid a patchwork of emissions regulations. But truck makers are continuing...

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