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Particulate Polutions |
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This Web site provides information about the Clean Air Fine Particle Rule, an EPA action designating areas whose air quality does not meet the health-based standards for fine particle pollution.
A designation is the term EPA uses to describe the air quality in a given area for any of six common pollutants known as criteria pollutants. Those pollutants include fine particles, which are unhealthy to breathe and have been associated with premature mortality and other serious health effects. Fine particles are those less than 2.5 micrometers in diameter and are also referred to as PM2.5.
Once nonattainment designations take effect, the state and local governments have three years to develop implementation plans designed to meet the standards by reducing air pollutant emissions contributing to fine particle concentrations.
8-hour Ozone Designations
EPA designated 8-hour ozone nonattainment areas in April 2004. Visit the 8-hour ground-level ozone designations page to learn more about that action.
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