Begin using the Diesel Emissions Quantifier

The Quantifier

The Diesel Emissions Quantifier (Quantifier) is an interactive tool to help state/local governments, fleet owners/operators, school districts, municipalities, contractors, port authorities, and others to estimate emission reductions and cost effectiveness for clean diesel projects. Estimates are made using specific information about a fleet. If you are applying to EPA, or some other Federal or state/local funding assistance program, this site will help you to prepare and submit your diesel emissions data to EPA. EPA has built the Quantifier based on existing EPA tools and guidance and it can be used by potential grantees, state and local governments, metropolitan planning organizations, and fleet owners and operators, among others. The Quantifier uses emission factors and other information from EPA's National Mobile Inventory Model (NMIM). NMIM includes the MOBILE 6.2 and NONROAD2005 models. Read more basic information.

NOTE - due to the real-time calculations the site performs, these Web pages may pause and change while you are working, depending what you enter, to make your calculations more efficient. Contact us if you need help with accessibility of this site.

This Web site includes:

The Quantifier – begin here to choose the “scenario” for your type of fleet, year, location, and other information, for example, school busses in Kansas. Click here to begin now.

Basic information – get more information about the purpose and uses of the Quantifier, who should use this and why EPA collects diesel emissions data, how the “save” feature works, and more.

Instructions – complete information about using the Quantifier. Start here to review the complete instructions, calculations, and assumptions.

Disclaimer – there are certain caveats about the Quantifier that you need to be aware of.