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National Clean Diesel Campaign (NCDC)

Working Together for Cleaner Air

State & Local Toolkit - Support

Building Support

Building strong support for an emission reduction program increases the likelihood of a successful program. Resources below describe clean diesel benefits and cost-effectiveness, and include information about available partnerships (such as the Regional Clean Diesel Collaboratives), outreach materials, and educational resources.


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Clean Diesel Benefits

Protecting Public Health

Older diesel engines emit large amounts of nitrogen oxides (NOx) and particulate matter (PM). Both of these pollutants contribute to serious public health problems that result in instances of premature mortality, asthma attacks, lost work days, and numerous other health effects. In addition, children, the elderly, and people with existing heart or lung disease, asthma, or other respiratory problems are especially sensitive to the health effects of fine particles. EPA has also determined that diesel exhaust is a likely human carcinogen.

For more information:

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Air Quality Goals and Mitigation Measures

Diesel engines can affect an area’s efforts to meet National Ambient Air Quality Standards. Clean diesel strategies are cost-effective. The emission reductions they produce can help satisfy State Implementation Plans (SIPs) and conformity plans. Clean diesel strategies can also be used as mitigation measures under programs such as the National Environmental Policy Act (NEPA) and the Supplemental Environmental Project (SEP).

Claiming SIP Emissions Credit

Diesel retrofit technologies reduce pollution from the existing diesel engine fleet by up to 90 percent for PM, up to 50 percent for NOx, and up to 90 percent for volatile organic compounds.

Cost Effectiveness Information

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Partnerships, Outreach, and Education

Partnerships, outreach, and education are important components of every program. Clean Diesel Collaboratives are a key resource for assistance.

Clean Diesel Collaboratives

Reducing diesel emissions is a shared responsibility. Collaboration has been the hallmark of successful clean diesel programs. A successful program brings together the right people from government, environmental and community organizations, fleet owners/operators, private industry, and other stakeholders.

As part of the National Clean Diesel Campaign, seven regional collaboratives across the nation work to leverage funds and take a local approach to diesel emission mitigation. These Clean Diesel Collaboratives are diverse, multi-stakeholder groups that provide technical assistance, foster partnerships, and identify and leverage resources.

Regional Clean Diesel Collaboratives

Map of Regional Clean Diesel Collaboratives Northeast Diesel Collaborative (EPA Regions 1, 2) Mid-Atlantic Diesel Collaborative (EPA Region 3) Southeast Diesel Collaborative  (EPA Region 4) Midwest Clean Diesel Initiative (EPA Region 5) Blue Skyways Collaborative (EPA Region 6 and 7) Rocky Mountain Clean Diesel Collaborative (EPA Region 8) West Coast Collaborative (EPA Regions 9, 10, w/Canada and Mexico)

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Outreach and Education Materials

Examples of state and local government outreach and education programs to reduce diesel emissions:

  • DieselWise Indiana Exit EPA Disclaimerprovides information on the Indiana Department of Environmental Management's diesel emissions reduction efforts, including projects that retrofit and/or reduce idling from vehicles. The state also awarded a State Quantity Purchase Agreement (QPA) for state governments to purchase diesel oxidation catalysts (DOCs).
  • Greater Boston Breathes Better (GB3) is a partnership among public, private, and governmental entities to help greater Boston's citizens and visitors to breathe better. GB3 promotes strategies and implements projects to reduce air pollution from transportation and construction sources.
  • New York Metropolitan Transportation Council (NYMTC) Exit EPA Disclaimeris using more than $100 million in Congestion Mitigation and Air Quality (CMAQ) funds on clean diesel projects. Projects can be found in the NYMTC's Transportation Improvement Program.
  • Philadelphia and Delaware Diesel Difference Exit EPA Disclaimeris a coalition of diverse partners with a mutual interest in reducing air pollution from diesel engines in the greater Philadelphia area.
  • Wisconsin Partners for Clean Air Exit EPA Disclaimerprogram is retrofitting more than 500 school buses with a grant from EPA and the Wisconsin Department of Transportation.

Additional outreach and educational materials:

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