What Is The PM 2.5 Standard?

What Is The PM 2.5 Standard? Currently, the EPA has primary and secondary standards for PM2.5 (annual average standards with levels of 12.0 μg/m3 and 15.0 μg/m3, respectively; 24-hour standards with 98th percentile forms and levels of 35 μg/m3) and PM10 (24-hour standards with one-expected exceedance forms and levels of 150 μg/m3). What level of

What Level Of PM2 5 Is Unhealthy?

What Level Of PM2 5 Is Unhealthy? AQI Category Index Values Revised Breakpoints (μg/m3, 24-hour average) Unhealthy for Sensitive Groups 101 – 150 35.5 – 55.4 Unhealthy151 – 200 55.5 – 150.4 Very Unhealthy 201 – 300 150.5 – 250.4 Hazardous 301 – 400 250.5 – 350.4 Is PM 2.5 really dangerous? Fine particles (PM2.5)