Table 1: WHO IT guidelines for coarse and fine PM.

24-h mean levelPM10 (µg/m3)PM2.5 (µg/m3)Basis for the selected level

IT-115075 About 5% increase of short-term mortality over AQG
IT-210050 About 2.5% increase of short-term mortality over AQG
IT-37537.5 About 1.2% increase in short-term mortality over AQG
AQG5025 Based on relation between 24-hour and annual PM levels