Introduction
Delhi woke up to its worst air of the season on Friday, 13 November 2026, as a thick blanket of smog settled over the capital and the average air quality index crossed 400 into the severe category. For residents, the story of Delhi air pollution AQI November 2026 is not just a number on a screen. It is burning eyes on the morning walk, a grey sky at noon, school advisories, and a daily question millions of families now ask before leaving home: is it safe to go outside today?
This article explains what is happening in plain language: what AQI means, how bad the air has been this week, why Delhi’s air turns so toxic every November, the GRAP stages and the rules in force now, the health effects, and practical steps to protect your family. If you want the wider news picture for the month, see our roundup of the top news in India in November 2026.
What Is AQI and How Do You Read It?
AQI stands for Air Quality Index, a single number that sums up how clean or polluted the air is at a given place and time, based on pollutants such as PM2.5, PM10, nitrogen dioxide, sulphur dioxide, carbon monoxide and ozone. In Delhi in November, the main culprit is PM2.5, very fine particles small enough to enter deep into the lungs.
India’s Central Pollution Control Board (CPCB) uses six AQI categories:
| AQI range | Category | What it means |
|---|---|---|
| 0 to 50 | Good | Little or no risk from air pollution. |
| 51 to 100 | Satisfactory | Acceptable, though a few sensitive people may feel minor irritation. |
| 101 to 200 | Moderate | Possible breathing discomfort for people with lung or heart disease and children. |
| 201 to 300 | Poor | Breathing discomfort on prolonged exposure for most people. |
| 301 to 400 | Very poor | Respiratory illness on prolonged exposure, worse for lung and heart patients. |
| 401 to 500 | Severe | Respiratory effects even in healthy people, serious for lung and heart patients. |
Different apps can show different AQI numbers for the same city, because some use the Indian CPCB scale and others use the US scale or their own formula. One weather service showed a Delhi reading of 285 labelled “very unhealthy” on 13 November, while the CPCB reading was above 400. Do not compare numbers across platforms. For official readings, use the CPCB Sameer app or the SAFAR portal, and check your own locality, because AQI can differ sharply across the city.
Delhi Air Pollution AQI November 2026: How Bad Is the Air Right Now?
The week of 9 to 13 November 2026 shows a clear and worrying climb. The figures below are the averages reported from CPCB data in the sources listed in the research note, and the official 24-hour average for each day is settled at 4 pm.
- Monday, 9 November: the day after Diwali, Delhi’s average AQI was reported at 376, very poor, as smog blanketed the capital.
- Tuesday, 10 November: the average AQI was reported at 299, poor, a small relief after the post-Diwali spike.
- Wednesday, 11 November: the average AQI rose to 313, back in the very poor category, with some stations recording readings close to 400.
- Thursday, 12 November: the average AQI was reported at 321 at 7 am and 350 for the day, firmly very poor, and forecasters warned severe air was likely by Friday.
- Friday, 13 November: Delhi’s average AQI was reported at 403 at 6 am, 8 am and 9 am, the first severe day of the season. A later reading reported by IANS put the AQI at 419 at 8:40 am.
On the morning of 13 November, 33 of Delhi’s 58 monitoring stations recorded severe air, 24 recorded very poor air, and only one recorded moderate air. The worst spots were IIT Delhi at 488, Chandni Chowk at 479, Delhi University North Campus at 478, Pusa at 469 and ITO at 455, as reported. Adjoining Noida was even worse, with an average reported at 474.
The forecast offers little comfort. The India Meteorological Department and the Indian Institute of Tropical Meteorology have forecast very poor to severe air until at least 16 November, with slow winds keeping pollutants trapped close to the ground. Residents should plan for several more days of hazardous air.
Why Does Delhi’s Air Get So Bad Every November?
Delhi’s November air crisis is not caused by one thing. It is several factors arriving at the same time.
First, winter weather traps pollution. As temperatures fall, cool air settles near the ground with warm air above it, an inversion that acts like a lid on the city. Smoke and dust cannot rise and disperse, so they stay where people breathe. Winds also slow down in November, and morning fog mixes with smoke to form smog, which is why visibility is worst in the early hours.
Second, stubble burning in Punjab, Haryana and Uttar Pradesh adds a large load of smoke in late October and November, when farmers clear paddy fields after harvest. The smoke travels hundreds of kilometres and settles over Delhi-NCR, though its exact share varies from day to day with wind direction.
Third, Diwali firecrackers add a sharp spike. Diwali fell on 8 November in 2026, and the day after, Delhi’s AQI was reported at 376. Firecracker smoke is rich in PM2.5 and toxic metals, and in still winter air it stays for days.
Fourth, Delhi’s own everyday sources never stop: vehicle exhaust, road dust, construction dust, industrial emissions, diesel generators, waste burning and cooking smoke. These keep the baseline high all year, so when the seasonal factors arrive, the city crosses into very poor and severe very quickly.
GRAP Stages Explained: What the Four Stages Mean
The Graded Response Action Plan, or GRAP, is Delhi-NCR’s emergency action plan for air pollution. It was notified in 2017 following Supreme Court orders and is now enforced by the Commission for Air Quality Management (CAQM), a statutory body set up under the CAQM Act of 2021. GRAP has four stages, each triggered by the AQI level, and when a stage is invoked, the measures of the earlier stages continue as well.
- Stage I, Poor (AQI 201 to 300): dust control at construction sites, mechanised road sweeping, checks on polluting vehicles, and a ban on open waste burning.
- Stage II, Very Poor (AQI 301 to 400): a ban on diesel generators except for essential services, more road sweeping and water sprinkling, and stricter dust control at construction sites.
- Stage III, Severe (AQI 401 to 450): a ban on non-essential construction and demolition, closure of stone crushers and mining, curbs on certain vehicles, and hybrid or online classes for younger schoolchildren where ordered.
- Stage IV, Severe Plus (AQI above 450): the strictest measures, which can include a ban on truck entry into Delhi except for essential goods, school closures, a stop on all construction, and work-from-home advisories.
Stage III was invoked across Delhi-NCR on 6 November 2026, when the daily average AQI was reported at 382, in the very poor category. The CAQM acted in advance because the forecast indicated the AQI would slip into the severe category in the coming days, which is exactly what happened on 13 November. Stage IV is triggered if the 24-hour average AQI crosses 450.
For schoolchildren, Stage III has already changed daily life. Hybrid classes, a mix of in-person and online learning, were ordered for students up to Class 5 from 7 November, and school sports competitions scheduled for November and December have been asked to be rescheduled. Parents should follow their own school’s circulars rather than social media rumours.
How Severe Air Affects Your Health
An AQI above 400 is not just uncomfortable. The CPCB itself says that severe air causes respiratory effects even in healthy people and serious impacts for people with lung or heart disease.
In the short term, common symptoms include burning and watering eyes, a sore throat, coughing, a blocked or runny nose, headaches and breathlessness. People with asthma often find their inhaler use goes up, and children may develop a persistent cough that lingers for days after the smog clears.
In the longer term, repeated exposure to high PM2.5 is linked to reduced lung function, more frequent asthma attacks, bronchitis, heart problems and a higher risk of stroke. Children, pregnant women, elderly people and people with asthma, chronic obstructive pulmonary disease or heart disease are the most vulnerable. If you have breathlessness at rest, chest pain, or an asthma attack that does not respond to your inhaler, seek medical help at once rather than waiting for the air to improve.
There is also a hidden health cost. Thick smog blocks sunlight, which reduces the body’s natural vitamin D production, and in winter this adds to a problem already common in India. Read our guide to vitamin D deficiency to know the symptoms and what to do about them.
What the Government Is Doing
The main response in force now is GRAP Stage III, described above, with the CAQM monitoring the situation and reviewing the air quality regularly. The Commission invoked Stage III on 6 November as a precautionary measure, three days ahead of Diwali, because the forecast pointed to a further deterioration.
Beyond GRAP, short-term steps include water sprinkling and mechanised sweeping on roads, strict checks on construction sites, enforcement drives against polluting vehicles and open waste burning, and advisories for schools and offices. Delhi and neighbouring states also coordinate on stubble burning, with subsidised machinery for farmers, fines for burning, and satellite monitoring. Long-term work includes expanding the metro and electric bus fleet, pushing cleaner fuels and tightening vehicle emission norms, but these measures take years to show results, which is why the same crisis returns every November.
What Residents Can Do: Practical Steps to Stay Safe
You cannot control the city’s air, but you can control how much of it you breathe. These steps are practical and low cost, and worth following while the AQI stays very poor or severe.
- Check the AQI before you go out. Use the CPCB Sameer app or the SAFAR portal and check your own locality, not just the city average. Plan outdoor work for the afternoon if the morning reading is severe, when the air is usually worst.
- Wear a proper mask outdoors. A well-fitted N95 or equivalent respirator is the only mask that filters PM2.5 effectively. Surgical masks and cloth masks leak around the edges and do not protect against fine particles. Replace it when it is damaged, dirty, or hard to breathe through.
- Change your morning routine. Skip dawn jogs, outdoor yoga and morning walks while the air is severe, and move exercise indoors. If you follow a fixed morning routine, shift the outdoor part to the afternoon or replace it with indoor exercise for a few days.
- Keep indoor air cleaner. Keep doors and windows closed in the room you spend the most time in, and run an air purifier if you have one. Choose a purifier sized to your room using its Clean Air Delivery Rate, or CADR, and prefer models with a HEPA filter and activated carbon. Avoid ozone-generating gadgets.
- Ventilate wisely. A fully sealed home can build up carbon dioxide and indoor pollutants. When the outdoor AQI dips in the afternoon, open the windows briefly to air out the room, then close them again and run the purifier.
- Protect children, elders and patients. Keep inhalers and regular medicines handy, and keep children, elderly family members, pregnant women and people with asthma or heart disease indoors as much as possible.
- Commute smart. In traffic, keep car windows shut and use the air conditioner on recirculation mode with a clean cabin filter. On a two-wheeler, wear a proper N95 mask and goggles if your eyes water. Ask about work from home on severe days if your office allows it.
- Do not add to the problem. Do not burn leaves, garbage or plastic, avoid bursting firecrackers, and report open burning and heavy construction dust to your local authority. Small actions add up across a city of more than 20 million people.
Frequently Asked Questions
What is the AQI of Delhi today?
As reported on the morning of 13 November 2026, Delhi’s average AQI was 403, in the severe category, with a later reading of 419 at 8:40 am. Check the live CPCB Sameer app or SAFAR portal before stepping out, because hourly readings change through the day.
What does an AQI of 400 mean?
An AQI of 400 is the top of the very poor category, and 401 is the start of severe. At this level, the CPCB says even healthy people can feel respiratory effects, and people with lung or heart disease face serious health impacts. Avoid outdoor exercise and prolonged outdoor work.
What is GRAP Stage III and what rules apply now?
GRAP Stage III is the third stage of the Graded Response Action Plan, triggered when the AQI is in the severe range of 401 to 450. Invoked across Delhi-NCR on 6 November 2026, it bans non-essential construction and demolition, closes stone crushers and mining, restricts certain vehicles, and brings hybrid classes for younger schoolchildren where ordered.
Which mask protects against Delhi air pollution?
A well-fitted N95 or equivalent respirator is the effective choice, because it filters PM2.5. Surgical masks and cloth masks leak around the edges and offer little protection against fine particles. Replace the mask when it is damaged, dirty or hard to breathe through.
Is it safe to exercise outdoors in Delhi in November?
Not when the AQI is very poor or severe. Morning is the worst time, because the inversion traps pollution close to the ground. Move workouts indoors, or wait for an afternoon window when the AQI has dipped.
When will Delhi’s air quality improve?
The IMD and IITM forecast very poor to severe air until at least 16 November 2026. Real improvement usually needs stronger winds or rain, so check the official forecast each morning.
Conclusion
Delhi air pollution AQI November 2026 has once again reached the severe category, with the city average crossing 400 on 13 November, GRAP Stage III in force since 6 November, and forecasts pointing to several more days of very poor to severe air. The causes are familiar: winter inversion, slow winds, stubble burning, Diwali firecrackers and the city’s own traffic and dust. The answers are familiar too: check the official AQI before going out, wear a well-fitted N95 mask, keep outdoor time short, move exercise indoors, and protect children and elderly family members. Until the weather changes, treat every severe day seriously and plan your day around the AQI.
