Air Quality Index in India and its states


We all are aware of this term but not completely. Irrespective of outside or indoors, air pollution refers to air contamination. It occurs due to physical, chemical, or biological alteration to the atmospheric air. A lot of harmful gases, smoke and dust enter into the surroundings and make air hazardous for every living being such as aquatic animals, plants, animals and human beings, directly or indirectly.


A combination of gases like nitrogen, carbon, sulfur, etc., form an atmosphere. But, the addition of gases cause imbalance due to decrease/increase in the percentage of present atmospheric gases. Then, these gases will become harmful to survival. AQI (Air Quality Index) is an essential tool for examining the air quality status. It works by transforming data of air quality of different pollutant into color & single number. carbon monoxide (CO). Air Quality Index India is further divided into six standard air quality categories. Here, each category includes Air Quality Index values, associated health impacts associated and cautionary.  


Good (0-50): Minimal impact on health; None.

Satisfactory (51-100): Minor breathing discomfort to sensitive people; Limit prolonged outdoor exertion.

Moderately Polluted (101-200): To the people with heart, lungs & asthma diseases, breathing discomfort; Limit prolonged outdoor exertion.

Poor (201-300): Breathing discomfort to the people on prolonged exposure; Limit prolonged outdoor exertion.

Very Poor (301-400): Prolonged exposure can cause respiratory illness; Should avoid outdoor exertion.

Severe (401-500): Cause serious impacts on people with existing diseases and affects healthy too; Should avoid outdoor exertion.

These categories are decided on the basis of ambient concentration values of pollutant in the air and their health impacts.

The first Bangalore Air Quality monitoring station was set up at Anand Rao Circle. And, then it was relocated to the City Railway Station.


Bangalore doesn’t figure out in the WHO list of 14 most affected cities by air pollution. The level of air pollution in Bangalore is actually much better than most of the major India cities. Most of the air quality monitoring stations have recorded particulate matter PM2.5 across Bangalore in the National Ambient Air Quality Standards excess. This is occurred due to the increase in construction activities and vehicular traffic.

Below, we mention the major reasons for air pollution in Bangalore:

A spike of 27 units of pollution because of industries.

7 to 18 units air pollution caused due to increase diesel generator use. People prefer it for daily activities at the time of power cuts. Use of DG sets results in an increase of air pollution level.

45-55 units air pollution due to roadside dust. This is occurred due to frequent roads digging by civic agencies. These agencies install utility ducts as well as leaves them untarred for too long.

Recorded 10-22 units air pollution due to vehicles.


In Delhi, the quality of air is worst as per WHO survey of 1600 cities across the world. This is estimated that air pollution kills around 1.5 million people in India every year. According to the World Health Organization, India has recorded with the world highest death rate because of chronic respiratory diseases. Delhi Pollution irreversibly affects the lungs of 50% or 2.2 million children.

In October 2018, there was a research paper published by India’s Ministry of Earth Sciences attributing almost 18 percent to industries, 41% of PM-2.5 air pollution due to vehicular emissions and 21.5 percent to dust.

Index of Air Pollution In Delhi Statistics is at the moderate level between January to September(101-200) and then deteriorates drastically to the very poor(301-400) or hazardous(500+) in the month of October, November and December. All this is happened because of burning firecrackers, stubble burning, emission of unburned carbons and cold weather.

In the Great Smog event of Delhi, in November 2017, the level of air pollution spiked beyond acceptable. The safe limit for PM10 & PM2.5 particulate matter is 60 & 100 respectively but they the hit the level of 999 micrograms per cubic meter.

At the end of 2018, the overall Air Quality Index Gurgaon was recorded 239 at night (8 PM) on Friday according to the Central Pollution Control Board(CPCB) data. But in the last one week, this city crossed the AQI level to 400-mark. On the last day of 2018 year, AQI was recorded at 475 on 30th December and 438 on 31st December. At the monitoring location, the individual pollutants sub-indices are calculated with its  24-hourly average CO & O3 concentration values and the range of health breakpoint concentration.

In January 3rd, 2019, Gurgaon was recorded as the most polluted city in Delhi-NCR. Its air quality index (AQI) is raised to 458(Severe) from 394(Very Poor) on Tuesday. While in other cities, it was recorded in Delhi at 430, Faridabad at 411, Noida at 412, Greater Noida at 455 and Ghaziabad at 438.

Not all, but a few major reasons are enlisted below that effects Air Quality in New Delhi.

In the winter season, pollutants & dust particles of air become unable to move on. These unwanted particles get locked in the air and cause smog by affecting weather conditions.

Overpopulation in the capital is another reason for air pollution. It only adds different types of pollution, directly or indirectly, to the environment, whether it is noise or air.

Traffic is also a reason contributing to air pollution and smog in Delhi Pollution. The increase of vehicular emission results in causing hazardous effects on the health of people. Both the CPCB (Central Pollution Control Board) and NEERI (National Environmental Engineering Research Institute) have declared it as a major cause of air pollution in New Delhi.

The capital shares its boundary with Uttar Pradesh, Punjab and Haryana. In these states, farmers burn crops which leads to contribution to New Delhi Pollution. They set afire on approximately 35 million tonnes crop in these states. All the pollutants & dust particles locked in the environment are carried by the wind.

Construction in large scale also increases air pollution in Delhi-NCR.

Garbage dumps and industrial pollution increases build-up smog and cause air pollution.

You should go for the below methods to reduce or prevent Air Pollution:

Use environmental-friendly vehicles

Plant More Plants

Go solar

Get the lead out from your life

Use public transportation mode

Reduce, Reuse and Recycle

Conserve energy

Reduce the amount of burning fossil fuels


















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