t f R r
_

Particulate Matter values

It is one of our daily life conditions, it has a great impact on our lives, but we are not aware of interference factors in our air living space like particulate matter. It is not tangible, visible and sensory barely perceptible.”Particulate matter,” also known as PM, is a complex mixture of extremely small particles and liquid droplets. Particle pollution is made up of a number of components, including acids (such as nitrates and sulfates), organic chemicals, metals, and soil or dust particles. We have to be afraid about particles that are 10 micrometers in diameter or smaller because those are the particles that generally pass through the throat and nose and enter the lungs.
Particulate matter has a big impact on our health like respiratory infections, heart disease, and lung cancer. Hereby are some examples of some countries about the daily particulate matter guideline value for PM10:
  • The daily particulate matter guideline value of the World Health Organization
    is 50 μg/m3 over a 24-hour period without any exceedences per year.
  • From 2005 the daily average guideline value from the European Commission
    is 50 µg/m³ over a 24-hour period with 35 days allowed exceedences per year.
  • The daily particulate matter guideline value of The National Environment Protection Measure for Ambient Air Quality, Australian governments is 50 µg/m3 in outdoor air averaged over a 24-hour period with no more than five days exceedences per year.
  • The National Ambient Air Quality Standards from EPA (Environmental Protection Agency of the United States)
    are 150 μg/mover a 24-hour period, not to be exceeded more than once per year on average over 3 years.

Every country handled his own standards. This seems a paradox, since these influences have the same impact on human nature. For me an important question arises: What tell us these values actually?