Delhi air quality worsens, AQI hits 389 as several areas turn ‘severe’

The Air Quality Index, or AQI, turns measurements of several air pollutants into one easy-to-understand number. It helps people and authorities judge how clean or polluted the air is. Higher readings mean worse air quality and greater potential health concern. The exact pollutants included and category ranges can vary by country, but the basic purpose is the same.

An AQI of 389 is in the “very poor” category under the scale reported by the Central Pollution Control Board. It is far above the article’s lower categories and close to the “severe” readings recorded in several neighbourhoods. IIT Delhi and Rohini each reached 474, showing that some locations were much worse than the citywide average.

The reading matters because pollution was widespread, not limited to one monitoring station. Residents reported breathing difficulty, eye irritation, anxiety and burning sensations. Authorities responded with water sprinklers under Stage II of GRAP, while shallow fog was forecast for the following days.

Pollution was widespread across the capital. Delhi’s overall AQI stood at 389, in the “very poor” category, while multiple monitoring locations entered the “severe” category. This shows that the problem was not confined to a single neighbourhood or pollution source. Different readings reflect local conditions and nearby emissions.

The highest readings came from IIT Delhi and Rohini, both at 474. Punjabi Bagh followed at 465, then RK Puram at 443. ITO recorded 422, Firoz Shah Road reached 420, and India Gate stood at 403. Other stations also reported high levels, including Aya Nagar at 393 and Chandni Chowk at 391.

The spread had practical consequences for residents and officials. Anand Vihar and Akshardham recorded 359, while IGI Airport Terminal 3 reached 385. Municipal authorities deployed truck-mounted sprinklers around India Gate under Stage II of GRAP as pollution remained dangerously high.

When pollution reaches very poor or severe levels, people may breathe in unusually large amounts of harmful particles and gases. Short-term effects can include throat irritation, coughing, breathlessness, eye irritation and discomfort. People with asthma or other lung conditions may be especially sensitive. The risks generally rise as pollution becomes more concentrated and exposure lasts longer.

Delhi residents described these effects directly. Sarvesh said pollution made breathing difficult, caused anxiety and produced a burning sensation in the eyes. The report also described heavy smog despite limited morning traffic. These accounts illustrate how severe air pollution can affect daily comfort and normal breathing, even before considering longer-term exposure.

Established health research links repeated exposure to polluted air with aggravated heart and lung disease and other serious risks. The article does not provide medical measurements or diagnoses, so individual effects cannot be determined from the reported AQI alone. Limiting exposure and following official health advice becomes especially important during severe episodes.

The Graded Response Action Plan, or GRAP, is a staged system for responding to worsening air pollution. It links increasingly strong administrative measures to air-quality conditions. The aim is to reduce emissions quickly during pollution episodes rather than rely only on long-term policies. The article identifies the response as Stage II, but does not list every measure included at that stage.

Municipal authorities deployed truck-mounted water sprinklers around India Gate. Sprinkling wets exposed dust, reducing the amount that can be lifted into the air by passing vehicles or wind. It can therefore address local dust, although it cannot remove every pollution source. The action was described as part of GRAP Stage II.

The deployment shows that officials were treating the situation as an active pollution emergency. Delhi’s overall AQI was 389, while several areas were in the severe category. The article gives no evidence that sprinklers alone changed the AQI. Further action would depend on pollution readings and the broader sources affecting the city.

Severe pollution usually develops when emissions build faster than the atmosphere can disperse them. Human sources can include vehicle exhaust, construction dust, road dust, industrial activity and the burning of crop residue. The article specifically connects Delhi’s crisis with unchecked urbanisation and alleges that Punjab’s stubble burning contributed significantly to the city’s deteriorating air quality.

Weather controls how long pollution remains near the ground. Low wind speeds provide less ventilation, allowing emissions to accumulate. Fog or temperature-related atmospheric stability can also limit vertical mixing. The article records mainly clear skies and forecasts shallow fog for four days, followed by fog or mist on November 10 and 11. It does not report wind speeds.

These factors can reinforce one another. Emissions continue entering the air, while weak dispersion keeps them concentrated over the city. The article does not measure the contribution of each source. Its reported readings, however, show the combined result: an AQI of 389 overall and severe readings at several stations.

Crop-residue burning sends smoke and fine particles into the atmosphere. Vehicle exhaust adds gases and particles close to busy roads, while construction and disturbed soil release dust. These sources can operate simultaneously, increasing the pollution load. The article specifically reports that Delhi’s environment minister blamed Punjab stubble burning for contributing significantly to the city’s poor air.

Fog does not necessarily create all the pollution, but it can accompany conditions that keep pollutants near the ground. Low wind speeds reduce ventilation, so smoke, exhaust and dust disperse more slowly. Construction dust can also be resuspended by vehicles or wind. These mechanisms are established environmental knowledge; the article does not quantify their separate contributions or report Delhi’s wind speed.

The reported readings show the outcome of a polluted atmosphere. Delhi’s overall AQI reached 389, while IIT Delhi and Rohini recorded 474. The forecast of shallow fog over four days raises concern about continued poor visibility and pollutant accumulation, although the article does not predict future AQI values.

PM2.5 means particulate matter with a diameter of 2.5 micrometres or less. These particles are small enough to remain suspended in air and can be inhaled. The AQI combines several pollutants, so an AQI reading does not identify PM2.5 alone. The article reports AQI values but does not provide PM2.5 measurements.

PM2.5 can come directly from combustion, including vehicle fuel, coal, wood and crop residue. It can also form in the atmosphere when gases from combustion and industrial activity react. Dust and smoke may contain particles of different sizes. Crop-residue burning, vehicle emissions and other urban sources are therefore relevant possible contributors, although the article does not measure their individual shares.

Because PM2.5 is so small, it can pass beyond the nose and throat’s larger-particle defenses and reach deep lung regions. Some particles may cross into the bloodstream. This is established scientific knowledge, not a specific finding in the article. The reported breathing difficulty and eye irritation show residents’ discomfort, but do not identify the pollutant responsible.