Infographic - What is the difference between fine and coarse particulate matter?

  

There is constant confusion between PM2.5 vs. PM10 and “fine vs. coarse” fractions of particulate matter. The schematic above presents an overview of what is part of each of these fractions and they are broadly defined like this

• PM2.5 – this is all the particulate matter under 2.5 um
• PM10 – this is all the particulate matter under 10.0 um
• Fine PM – this is all the particulate matter under 2.5 um, which is same of PM2.5
• Coarse PM – this is all the particulate matter between 2.5 and 10 um

More such questions are answered in SIM-series # 44-2021 - 10 frequently asked questions on particulate matter (PM)