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EPA pushes back projected release of proposed Tier 3 light-duty vehicle emissions regulations to July

The US Environmental Protection Agency (EPA) has pushed back its projected release of the Notice of Proposed Rulemaking (NPRM) for Tier 3 light-duty vehicle emission and fuel standards to July 2012. Earlier, the projected date was March 2012.

The Tier 3 standards will succeed the current Tier 2 requirements. The standards in the new rule will lead to further reductions in ozone, particulate matter, nitrogen dioxide, and mobile source air toxics.

The Tier 3 standards are expected to be harmonized with the new California LEV III standards. (Earlier post.) EPA’s work on the Tier 3 standards began in February, 2011.


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