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Mobile engines burn fuel and generate air pollution that impacts the air we breathe.  The U.S. government is responsible for regulating mobile sources The DEQ Air Quality Division encourages public awareness and promotes emission reductions through clean air choices.


Mobile source engines produce air pollutants through combustion or evaporation.  Key pollutants produced include:  Carbon Monoxide, Hydrocarbons, Nitrogen Oxides, Particulate Matter, Air Toxics including Diesel exhaust and Greenhouse gases 

USEPA Air Pollution Report 2010



A collaboration between U.S. EPA and the freight industry to increase energy efficiency, reduce greenhouse gases and air pollution.

Clean Cities
A locally-based government and industry partnership, coordinated by the U.S. Department of Energy (DOE) to expand the use of alternatives to gasoline and diesel fuel.

Action Programs
Includes programs that seek to reduce specific pollutants by a variety of individual actions.  These include self-subscribe notification programs.

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MI-AIR      EnviroFlash 

EcoDriving Tip Sheet

Idle Reduction


One of the easiest ways to control mobile source emissions is to adopt Idle Reduction policies.  The Idle Reduction Fact Sheet for Schools includes information and a draft policy that Michigan school districts are encouraged to implement. Businesses and communities are encouraged to promote savings and cleaner air by advocating for idle reduction policies.

Clean Diesel Grants - Improve Michigan school Bus emissions.

Clean School Bus USA
A program from U.S. EPA to reduce children's exposure to diesel exhaust and the amount of air pollution created by diesel school buses.  Since 2004, several Michigan schools have used grants from the Clean School Bus USA program to reduce diesel emissions from their fleets.  More information is available on these efforts.

Michigan Clean Diesel Initiative




GASOLINE - An overview of EPA programs concerning gasoline fuels.  Another source of information on potential public health concerns from exposure to gasoline is the Agency for Toxic Substances and Disease Registry.

DIESEL - EPA program information about diesel is available.  Information on concerns with emissions is also available.

ALTERNATIVES - Including biodiesel, electricity, ethanol, hydrogen, natural gas, and propane.  This site also includes information on fueling stations and alternative fuel vehicles.


Under the 1990 Clean Air Act Amendments, the U.S. Department of Transportation cannot fund, authorize, or approve Federal actions to support programs or projects which are not first found to conform to the Clean Air Act requirements. The FHWA and the FTA jointly make conformity determinations.

This program, jointly administered by the FHWA and the Federal Transit Administration, provides funds to state and local agencies and organizations to invest in projects that reduce criteria air pollutants from transportation-related sources.  The AQD is part of a collaborative effort along with MDOT and the U.S. EPA and FHWA.

Useful information, tools and links to resources that identify emission reduction strategies, national policies, regulations, incentive-based programs, funding sources, calculators and other assistance.

It all adds up to cleaner air!


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