Category Archives: California

NOx Emission Reductions for Medium- and Heavy-Duty Trucks Forthcoming

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The timeline for federal NOx emission reductions for medium and heavy-duty trucks is uncertain, but expected in California in 2017.  The California Air Resources Board (CARB) is expected to issue a NOx standard in 2017 that should reduce NOx emissions by up to 90 percent:  the expected lower standard is 0.02 grams per brake horsepower hour (g/bhp-hr), a significant decrease for the current 0.2 g/bhp-hr.  Under the Clean Air Act (CAA), California may issue emission standards that are more stringent than federal standards.  While California is the only state with such authority, other states [...]Read more