Scorecard ranks states and counties based on the magnitude of cancer and noncancer health risks associated with estimated exposures to 40 hazardous air pollutants. For each of the health risk ranking criteria defined below, you can specify whether you want to rank your state or county based on the hazardous air pollutants emitted from all sources combined, or from specific source categories (area, mobile, or point sources). Source-based rankings do not include the estimated health risks associated with "background" levels of pollutants. Each of the ranking criteria are defined below, with links to more information if you need it.
NOTE: These rankings are based on exposure estimates derived from 1996 emissions data. There are important uncertainties associated with using models to predict current air quality. Scorecard risk estimates are based on EPA exposure estimates and provide a perspective on the magnitude and sources of hazardous air pollution problems. They are not definitive evaluations of health risk in a particular locale.