Air Quality Designations: 2006 24-hour Fine Particle National Ambient Air Quality Standards (2006 24-hour PM2.5 NAAQS), 1997 Annual PM2.5 NAAQS, and 1987 Annual Coarse Particle (PM10) NAAQS
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Air Quality Designations: 2006 24-hour Fine Particle National Ambient Air Quality Standards (2006 24-hour PM2.5 NAAQS), 1997 Annual PM2.5 NAAQS, and 1987 Annual Coarse Particle (PM10) NAAQS
Source: EPA Regulations news 2