Delhi's AQI: Why did it show 494 locally and 1,600 globally?

Published On : 2024-11-21T04:43:14+0530 [ IST ] | Author : Mayur_Tembhare
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The Delhi streets known for being alive and vibrant all year round stand empty and desolate as the thick blanket of smoke has pushed people inside their homes. The AQI of the city shows no sign of relief anytime soon.

Delhi's air pollution reached a hazardous level on Monday with the city's AQI averaging 494, according to the Central Pollution Control Board. This marked the second-highest AQI recorded since the index was introduced in 2015.

In India the AQI scale is capped at 500 and anything above that is classified as 'severe plus'. Dipankar Saha former head of the CPCB's Air Laboratory Division said: "In our AQI scale values from 451 to 500 fall in the ‘severe plus' category which is considered the highest level of air emergency and corresponds to the strictest anti-pollution measures

The US and Indian Air Quality Indexes (AQIs) calculate air quality using different formulas which results in varying scores even when based on the same pollutant data. Additionally, the measurement methods differ: IQAir’s AQI relies on sensor-based data while India’s is analyzer-based making the latter more accurate

What is an AQI?

AQI or Air Quality Index Air Quality Index is a numerical scale used to communicate the quality of the air and its potential health impacts. It measures the concentration of various air pollutants such as particulate matter (PM2.5 and PM10) carbon monoxide sulfur dioxide nitrogen dioxide and ozone. The AQI scale typically ranges from 0 to 500 with higher values indicating worse air quality and greater potential

Source : Reporters From Sunrise Chronicles

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