Lahore Becomes the World’s Most Polluted City Again as AQI Crosses 600

Lahore woke up on Monday, 9 November 2026, to air so thick with smog that the city once again topped the list of the world’s most polluted major cities. The Air Quality Index (AQI) in Lahore crossed 600, reaching levels officially classed as hazardous, while the Punjab government blamed smoke drifting across the border from Diwali fireworks in India — and warned that the dirty air would stay for at least another day.

It is a grim title Lahore knows well. Every winter, the city battles smog made of smoke, dust, vehicle fumes and farm fires. But Monday’s readings were extreme even by Lahore’s standards: at one point, the city’s air was more than three times as polluted as the next worst major city on Earth.

What the readings showed

According to Swiss air quality monitor IQAir, Lahore was ranked the world’s most polluted major city on Monday morning. In the live global ranking for 9am to 10am, Lahore recorded an AQI of 590. A separate hourly reading on the same platform reached 647.

To put that in context, the second-ranked city, Ulaanbaatar in Mongolia, recorded an AQI of just 177. Delhi was next at 174, followed by Kolkata at 173 and Sarajevo at 170. Lahore’s pollution level was more than three times higher than the city in second place.

The AQI scale runs from 0 to 500. A reading of 0 to 50 means the air is good. From 101 to 150 it is unhealthy for sensitive groups, from 151 to 200 it is unhealthy for everyone, and anything above 300 is classed as hazardous. At 590 and 647, Lahore was far beyond the top of the scale’s danger zone.

Some parts of the city were even worse. IQAir’s station-by-station ranking showed Allama Iqbal Town recording an AQI of 1,033. The CERP Office monitoring station reported 864, and Burki Road Paragon recorded 748. Hourly graphs showed that pollution rose sharply during the early morning and late-night hours, when dense smog forced many residents to stay indoors.

The crisis was not limited to Lahore. IQAir’s real-time ranking for Pakistani cities showed Raiwind at 688, Multan at 655, Lahore at 639 and Faisalabad at 600 — every one of them in the hazardous category.

There was some relief later in the day. Punjab Senior Minister Marriyum Aurangzeb said Lahore’s AQI had dropped to 208 by the afternoon, and by 7pm IQAir showed a reading of 196. That is still classed as unhealthy, but it was a big improvement on the morning’s hazardous levels. The minister credited the Punjab government’s anti-smog operations, better weather, stronger winds and continuous field monitoring.

Why the air got so bad

The Punjab government linked the latest spike partly to smoke moving across the border after Diwali, the Hindu festival of lights, which was celebrated in India over the weekend with large-scale fireworks.

A day earlier, on 8 November, the provincial government had warned that smoke from Diwali fireworks in neighbouring Indian Punjab, combined with crop-residue burning and easterly winds, could make Lahore’s air much worse. A special report issued by the government predicted that smoke from the fireworks could reach Lahore within five to 13 hours, and forecast higher pollution in Lahore, Kasur and the border areas on the morning of 9 November.

Amritsar, a major city in Indian Punjab, sits only about 50 kilometres from Lahore. Indian media reported that air quality deteriorated sharply after Diwali in Amritsar, Ludhiana, Jalandhar and Patiala. The AQI in Mandi Gobindgarh, another town in Indian Punjab, reportedly reached 445. Delhi also saw a sharp rise in pollution after the fireworks.

The Punjab government’s report also recorded 2,347 incidents of crop-residue burning — farmers setting fire to leftover stalks after the harvest — in Indian Punjab up to 4 November. Of these, 1,081 were reported in just three districts, Tarn Taran, Ferozepur and Amritsar, which sit directly opposite Lahore and Kasur. Those three districts accounted for 46 per cent of all the incidents recorded in Indian Punjab.

The report identified fireworks, crop-residue burning and still night air as the factors that could push Lahore’s air quality down. It also noted that Lahore’s nighttime PM2.5 concentration — the level of the finest, most dangerous pollution particles — had already reached 202 micrograms per cubic metre before Diwali even began.

The smoke is not only coming from across the border

It would be wrong to blame the smog on India alone. The same data shows that farm fires inside Pakistan are a major part of the problem — and by some measures, a bigger one.

An analysis by Hamari Hawa, using NASA satellite data, recorded 13,241 fire detections in Pakistani Punjab, compared with 3,158 in Indian Punjab, between 1 and 29 October 2026. That is more than four times as many detections on the Pakistani side, and the analysis found that 92 per cent of the detections in Pakistani Punjab were on farmland.

A separate analysis covering 15 October to 1 November found 7,130 crop-related fire detections within 100 kilometres of Lahore, on both sides of the border, including 781 within just 40 kilometres of central Lahore. The district figures included 322 detections in Sheikhupura, 149 in Tarn Taran, 106 in Amritsar, 77 in Nankana Sahib, 62 in Lahore itself and 50 in Kasur. The analysts cautioned that satellite detections show fire activity and should not be treated as individually confirmed crop-burning incidents.

In other words, Lahore’s smog is a shared, regional problem. Smoke from farm fires, fireworks, vehicles, factories and brick kilns mixes together across the whole Punjab plain on both sides of the border, and the wind carries it back and forth. That is why experts say lasting improvement will need action on both sides — not just blame in one direction.

This is not the first time this season that Punjab’s air has turned hazardous. Earlier this month, Lahore’s AQI hit 530 and Multan’s reached 719, with hospitals reporting more patients with breathing problems. You can read our earlier report on that episode here: Punjab Smog Crisis: Lahore AQI Hits 530 and Multan 719 as Hospitals Fill With Patients.

What the government is doing

The Punjab Environment Protection Agency (EPA) says it has stepped up its crackdown on stubble burning. The agency reported 679 agricultural fire incidents across the province, of which 650 had been put out through coordinated surveillance and firefighting.

The EPA said it had deployed specialised night squads, drones, tractor-mounted fire bowsers and Quick Response Units in farming hotspots. Its Climate Watch Hub uses satellite-based fire detection to spot vulnerable areas and alert district teams for on-the-ground checks and firefighting. The campaign covers districts including Hafizabad, Sheikhupura, Nankana Sahib, Faisalabad, Kasur, Sialkot, Sargodha and Gujranwala.

EPA Director General Abdullah Nayyar Sheikh has directed regional directors and field teams to prioritise anti-stubble-burning operations and monitor enforcement personally. He has also carried out surprise inspections along motorways and main roads to check surveillance and firefighting arrangements. Legal action is being taken against people involved in illegal crop-residue burning.

Senior Minister Marriyum Aurangzeb said all relevant agencies remain deployed in the field and urged the public to cooperate with enforcement bodies and follow official advisories. “Clean and healthy air is our top priority,” she wrote on X.

The Environment Protection Department is expected to release comparative findings on Tuesday, 10 November, assessing how much of the pollution came from weather conditions, local emissions, farm fires and cross-border sources. That assessment matters, because it will show how much of Lahore’s smog is home-grown and how much drifted in from across the border.

The provincial government had forecast that pollution would remain high on 9 and 10 November, with a slight improvement expected from 11 November.

What the smog means for your health

Air pollution is not just an inconvenience. According to global health statistics, air pollution — both outdoors and indoors — is the second-leading risk factor for deaths worldwide, claiming an estimated 8.1 million lives every year. Outdoor particulate matter alone accounts for about 4.7 million of those deaths.

The most dangerous part of smog is PM2.5: tiny particles less than 2.5 micrometres across, small enough to pass deep into the lungs and even into the bloodstream. High PM2.5 levels are linked to asthma attacks, bronchitis, heart problems and strokes. Children, older people, pregnant women and anyone with asthma, heart disease or other lung conditions are most at risk.

Delhi, which faces the same seasonal smog, has also been struggling. The Indian capital recorded severe air quality after Diwali, with the AQI hitting 441 in the days after the festival. Read more about Delhi’s toxic air here: Delhi’s Toxic Winter Air Is Back as Pollution Soars Ahead of Diwali.

How to protect yourself during smog

Smog season in Lahore usually lasts from late October into January, so it is worth knowing how to reduce your exposure. Our guide to staying safe during smog season is here: Lahore Smog Season: How to Protect Your Health.

Here are the key steps health experts recommend:

Stay indoors when the air is worst. Pollution in Lahore rises sharply in the early morning and late at night. If you can, avoid going out during those hours, and keep outdoor exercise for the middle of the day when the air is relatively clearer.

Wear a proper mask outdoors. A well-fitting N95 or KN95 mask filters out most PM2.5 particles. Ordinary cloth masks and surgical masks do not offer the same protection against fine particles.

Keep windows and doors closed. During heavy smog, keep your home sealed as much as possible, especially at night and in the early morning. If you use an air purifier, run it in the room where you spend the most time.

Protect children and older people. Children breathe faster than adults and take in more polluted air for their body size. Keep them indoors on hazardous days, and do not send them out to play in visible smog. Older people and anyone with asthma or heart disease should also limit outdoor activity and keep their medicines close at hand.

Check the AQI before you go out. Free apps and websites such as IQAir publish live readings for Lahore and other cities. If the AQI is above 200, treat the air as unhealthy and limit time outdoors. Above 300, it is hazardous — stay inside if you possibly can.

See a doctor if you struggle to breathe. If you develop a persistent cough, wheezing, chest tightness or shortness of breath during smog, seek medical advice rather than waiting for it to pass.

What happens next

All eyes are now on the Punjab Environment Protection Department’s findings, due on Tuesday, 10 November. The assessment should show how much of Monday’s record pollution came from Diwali fireworks across the border, how much came from farm fires, and how much came from Lahore’s own traffic and industry.

The provincial government expects pollution to stay high through Tuesday, with some improvement likely from Wednesday, 11 November, as weather conditions change. But the deeper question remains: Lahore has topped the world’s pollution ranking many times, and each winter the smog returns. Until farm burning, vehicle emissions and industrial pollution are tackled across the whole region, the city is likely to keep waking up to hazardous air.

For now, the advice is simple: check the air quality before you step outside, wear a proper mask, and keep children and older people indoors on the worst days.

Frequently asked questions

What was Lahore’s AQI on 9 November 2026?

Lahore recorded an AQI of 590 in IQAir’s live global ranking for 9am to 10am, with a separate hourly reading reaching 647. Both readings are in the hazardous category. By 7pm the reading had eased to 196, which is still classed as unhealthy.

Why is Lahore the world’s most polluted city?

Lahore sits in the Punjab plain, where smoke from farm fires, vehicle exhaust, factories and brick kilns builds up every winter. Still air, low wind and temperature inversions trap the pollution close to the ground. On 9 November, smoke from Diwali fireworks in Indian Punjab added to the problem, carried across the border by easterly winds.

Is the smog coming from India?

Partly. The Punjab government said Diwali fireworks smoke from Indian Punjab contributed to Monday’s spike, and 2,347 crop-burning incidents were recorded in Indian Punjab up to 4 November. But satellite data also shows far more fire detections in Pakistani Punjab than in Indian Punjab, so local sources are a major part of the problem too.

What is a safe AQI level?

On the standard AQI scale, 0 to 50 is good, 51 to 100 is moderate, and 101 to 150 is unhealthy for sensitive groups. Readings of 151 to 200 are unhealthy for everyone, 201 to 300 are very unhealthy, and anything above 300 is hazardous. Lahore’s reading of 647 was more than double the hazardous threshold.

When will Lahore’s air improve?

The Punjab government forecast that pollution would remain high on 9 and 10 November, with a slight improvement expected from 11 November. Smog season in Lahore typically runs from late October into January.

How can I protect my family from smog?

Stay indoors during the early morning and late night when pollution peaks, wear an N95 or KN95 mask outdoors, keep windows closed, use an air purifier if you have one, and keep children, older people and anyone with asthma or heart disease inside on hazardous days. Check the live AQI before going out.

Conclusion

Monday, 9 November was another record-breaking day for Lahore’s air — and not in a good way. With an AQI of 647 at its worst, the city was more than three times as polluted as any other major city in the world. Diwali fireworks across the border made things worse, but the satellite data tells a fuller story: farm fires on both sides of the Punjab plain, plus Lahore’s own traffic and industry, all feed the same choking smog.

The Punjab government’s assessment, due on Tuesday, should give a clearer picture of where the pollution came from. But for the people of Lahore, the immediate task is practical: check the air, wear a mask, and stay indoors when the smog is at its worst. Until the region tackles the sources of the smoke together, Lahore’s winters will keep turning hazardous.

Sources

• Dawn, “Lahore remains world’s most polluted major city as AQI crosses 600”, 9 November 2026: https://www.dawn.com/news/2043255
• Geo News, “Punjab links smog to cross-border Diwali fireworks in India as Lahore’s AQI tops 600”, 9 November 2026: https://www.geo.tv/latest/690360-punjab-minister-links-smog-to-cross-border-diwali-fireworks-as-lahores-aqi-tops-600
• Dunya News, “Lahore remains world’s most polluted major city as AQI crosses 600”, 9 November 2026: https://www.dunyanews.tv/amp/english/981969.php
• The Nation, “Lahore tops global pollution rankings, AQI surges 590”, 9 November 2026: https://www.nation.com.pk/09-Nov-2026/lahore-tops-global-pollution-rankings-aqi-surges-590

This article is for general information and education only. It is not legal or financial advice.