0

0

0

0

0

0

0

0

0

This article is more than 2 year old.

Explainer: What is Air Quality Index and how is it calculated?

Mini

If the AQI level is above 300, then it means that pollutants in the air is not only unhealthy but also a threat to the individual's life.

Explainer: What is Air Quality Index and how is it calculated?
With the advent of the winter season, concerns of air quality are making headlines across the country. The threat of rising air pollution levels is a big concern in several regions, especially the Delhi National Capital Region (NCR). The day by day pollution level is reported based on the numerical scale named air quality index (AQI).
What is AQI
AQI can be termed as the numerical scale used generally to assess the air quality with regard to human health and the environment. It is used by various agencies to assess the quality of air in a particular region on a daily basis. The main focus of the AQI is to calculate the effects of the air in a particular region to the health of the people breathing it.
What does it assess
The AQI mainly looks for major pollution causing factors in the air. They include particulate matter, ground-level ozone, sulfur dioxide (SO2), nitrogen dioxide (NO2), and carbon monoxide (CO) among others. Generally, a higher number in the AQI scale is seen as a higher pollution level and health risk in comparison to lower numbers that point to lesser health risk.
The pollution levels are classified into different categories in order to assess the risk level. They are:
  • Good: If the number shown in the index is not more than fifty, it means the air does not pose any health risk at all.
  • Moderate: If the number is between 50 and 100, then it means the air quality is moderate.
  • Unhealthy for sensitive groups: When the AQI level is between 100 and 150, it means the pollution level could be intolerable for certain sections such as young, old, weak etc.
  • Unhealthy: When the AQI level is between 150 and 200, then all the people could start feeling the adverse effect.
  •  Very unhealthy: When the AQI level is between 200 and 300, the breathing of the air could cause severe health problems to all.
  • Hazardous: If the AQI level is above 300, then it means that pollutants in the air is not only unhealthy but also a threat to the individual's life.
  • next story