This Auto Asthma Index is based on the pollution expected when the vehicle is halfway through its useable life. Your own vehicle's emissions will vary depending on how well it was assembled, how well it is maintained, how many miles it has been driven, and how you drive. (Learn what you can do to reduce smog and asthma in your community.)
This score is based on emissions of two smog precursors,
volatile organic and nitrogen oxide chemicals (VOCs and NOx). However, no
two smoggy cities are alike. To learn how this vehicle rates in your
town, based on the pollutants most important to local smog formation,
select your region from the pulldowns below. If you don't see your city
listed, choose your state, then pick your typical driving environment -
urban, rural, or suburban/mixed.
About the Index:
EWG used information from EPA's tests of model year 2001-2006 vehicles to derive our Auto Asthma Index scores. These pollution estimates represent the maximum allowable emissions after an automobile has been driven 100,000 to 150,000 miles. Cars sold under the same model name may in fact emit very different amounts of smog precursors. We selected the cleanest commonly available vehicle to determine its Auto Asthma Index. Therefore, the Auto Asthma Index values are a conservative estimate of vehicle pollution. We used EPA's Green Vehicle Guide cutpoints to determine the 1 through 10 Auto Asthma Index scores for automobile emissions. Find answers to common questions about the Auto Asthma Index.