What are particulates?

Particulates refer to tiny solid or liquid particles that are suspended in the air. These can include dust, soil particles, smoke, and other minute particles that can be emitted from various sources, including industrial activities, vehicular emissions, and natural processes such as wildfires or volcanic eruptions. When we refer to particulates, we are specifically highlighting their small size and solid nature, which allows them to remain airborne for extended periods and potentially impact air quality and human health.

The definition of particulates encompasses the idea that these small particles can penetrate deep into lung tissue when inhaled, leading to various health issues. This characteristic of being small and solid distinguishes them from gaseous pollutants, which are different in their state of matter and how they affect the environment. Liquid droplets and large debris from construction do not fall under the definition of particulates as they differ in size, form, and origin. Thus, the correct understanding of particulates is centered around their classification as small solid particles released into the atmosphere.