Definition

The particulate matter that is less than or equal to 100 micrometers in diameter is collectively known as PM100. They are also known as “inhalable dust”. This fraction of the particulate matter can enter the nose and/or mouth while breathing. Deposition takes place in the air passages between the mouth, the nose, and the larynx. Once released into the atmosphere, they tend to settle as they are heavier. Examples include wood particles, dust, etc.