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Engine Emission Standards

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Third Party Procurement

Frequently Asked Questions

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Q. I am looking for the engine emission levels for buses to be built in 2005. We are putting together a spec for bid and I need to be sure that the engines offered will meet the spec for what would be considered an ULEV diesel engine on low sulfur fuel.

A. We suggest you contact EPA at www.epa.gov since they have jurisdiction over engine emission standards. (Answer reviewed September 1, 2009)    

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Commitment to Accessibility: DOT is committed to ensuring that information is available in appropriate alternative formats to meet the requirements of persons who have a disability. If you require an alternative version of files provided on this page, please contact FTAWebAccessibility@dot.gov.