• Lung Care Foundation
  • 011 - 4225 2328
  • lung@lcf.org.in

Particulate Matter

What is Particulate Matter?

Particulate matter (PM), also called particle pollution, is a general term for extremely small particles and liquid droplets in the atmosphere.

Particulate Matter
• A complex mixture of extremely small particles and liquid droplets
• Made up of a number of components, including acids (such as nitrates and sulfates), organic chemicals, metals, and soil or dust particles
• Includes aerosols, smoke, fumes, dust, ash and pollen

Particulate Matter Size Definition

  • PM 10 – Particles with a diameter of less than 10 microns are called PM 10
  • PM 2.5 – Particles with a diameter of less than 2.5 microns are called PM 2.5
  • Ultra-Fine Particles (UFPs) – Particles with a diameter of less than 1 microns are called UFPs

Permeability of Particulate Matter into the Human Body

  • PM > 10 – 15 µm is the least harmful of all the particulates, as these particles do not penetrate the upper airway. These particles often get trapped by the tiny hair inside the nose and gets expelled out by the mucus present in the nose and the throat region.
  • PM < 10 µm – These particles get deposited below the larynx.
  • PM < 2.5 – 10 µm – These relatively course particles get deposited high in the trachea bronchial tree.
  • PM < 0.1 – 2.5 µm is the most toxic agents. This size particles get carried to the lower airway causing serious obstruction.
  • PM < 0.1 µm are also called the ultra-fine particles. These particles are present in the air in greater numbers. They remain in the airstream for larger amount of time.


Outdoor air pollution has been recognized as a source of discomfort for centuries as smoke, dust and obnoxious odors.


Indoor Air Pollution is 5 – 100 times more than the outdoor air pollution. Indoor air pollution is a concern in the developing countries

Since 2015, Lung Care Foundation has touched millions of lives
through its digital and media campaigns
and trained over 15000 lung ambassadors
through awareness camps

We continue to work on us towards our vision through collaboration with Schools, RWAs, PSUs, Healthcare Providers, Corporate Houses, Start-Ups & Other Healthcare professionals to make maximum impact and work towards the
“Care & Cure of 2.6 Billion Lungs of India”.