The ABCs of Pollution

What's Suspended Particulate Matter?

Suspended Particulate Matter refers to tiny solid or liquid particles suspended in the air, typically originating from air pollutants and other sources. The size of these particles can be quite small, usually measured in micrometers (μm) or nanometers (nm), depending on their specific type and source.

Here are some examples of suspended particulate matter and their general size ranges:

- PM10: This refers to particles with a diameter less than or equal to 10 micrometers. These particles can include dust, pollen, airborne soil particles, smoke, and certain pollutant particles.

- PM2.5: This refers to particles with a diameter less than or equal to 2.5 micrometers. These smaller particles are more likely to penetrate the respiratory system and pose higher health risks as they can reach deeper into the lungs.

- Nanoparticles: These particles have a diameter less than 100 nanometers (0.1 micrometers). Nanoparticles can include particles used in various industrial and scientific applications, such as nanomaterials, nanoparticles, and nanodust.

- Ultrafine Particles: Sometimes referred to as fine particles, they typically have a diameter smaller than 0.1 micrometers, falling into the nanoscale range. These particles can be generated by combustion processes, chemical reactions, or other industrial activities.

The size range of these suspended particles has a significant impact on air quality and health, as they can be inhaled into the human body, leading to respiratory diseases and other health issues. Therefore, monitoring and controlling suspended particulate matter emissions are essential for environmental protection and public health. Different countries and regions may have varying standards and limits for suspended particulate matter to ensure safe air quality.