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About DieselWise

In Indiana and across the country, pollution from diesel engines is a growing concern. The familiar black soot from buses and trucks contaminates our air and dirties our cities. Diesel exhaust is more than just a foul smell or visual nuisance; it is a detriment to public health. Numerous scientific studies have shown that exposure to the pollution from diesel exhaust increases risk for several serious health problems, including respiratory illness and cancer. However, diesel engines are a durable and economical source of power and are important to our economy.

The Indiana Department of Environmental Management (IDEM) is currently working on a number of projects to reduce harmful tailpipe emissions from diesel-powered vehicles. IDEM is working with school, municipal and public entities, as well as the private sector, to retrofit diesel vehicles with diesel oxidation catalysts, aftermarket auxiliary heaters and auxiliary power units that dramatically reduce harmful tailpipe emissions. In partnership with the School Transportation Association of Indiana, IDEM introduced a voluntary idle reduction program that can be implemented in school systems statewide. IDEM is working to advance cleaner diesel fuel, engine and retrofit technologies so that we can thrive economically while improving air quality through active participation in the Midwest Clean Diesel Initiative (MCDI). Keep in mind, there are many things you can do individually as well!

2020 DieselWise Indiana with Volkswagen DERA Option Request for Proposals

DieselWise Resources

  • Health Effects of Diesel Emissions
    • What are they?
    • Who is at risk?
    • Diesel Exhaust Pollutants
    • How to minimize your risk
  • Idling
    • Idle Reduction Images
    • Facts and Myths
  • Idle Reduction Alternatives
    • Definition of Idling
    • Negative Impacts Associated with Idling
    • Idle Reduction Alternatives
    • SmartWay Technology Package Savings Calculator
    • IDEM Voluntary Idling Program
    • Additional Resources
  • Indiana Diesel Emissions Reduction Projects
    • Diesel Oxidation Catalyst Exhaust Retrofit Projects
    • Idle Reduction Technology Retrofit Projects
    • Education/Outreach
    • Other
  • Public/School Transportation
    • How can school fleets minimize diesel emissions?
    • School Transportation Association of Indiana School Bus Idling Policy and Resolution
  • Fuel Alternatives/Options
    • Alternatively Fueled Vehicles
    • Ethanol
    • Biodiesel
    • Compressed Natural Gas
    • Propane/Liquefied Petroleum Gas
    • Ultra-low Sulfur Diesel
    • Additional Resources
  • Retrofit Technology and Other Strategies
    • Diesel Oxidation Catalyst (DOC)
    • Diesel Particulate Filter (DPF)
    • Aftermarket Auxiliary Heaters
    • Engine Repowers
    • Engine Upgrades
    • Vehicle and Equipment Replacements
    • Aerodynamic Technologies
    • Low Rolling Resistance Tires
    • U.S. EPA Verified Technology