Why Does Lahore Have to Wait for Winter to Remember Its Air?

Lahore’s air pollution is a year-round problem. Winter simply makes it impossible to ignore.

Lahore does not suddenly become polluted when winter arrives. Winter simply makes the pollution impossible to ignore.

This week showed it. In the first days of October, weeks before real cold, Lahore briefly topped the private monitor IQAir’s live ranking of major cities on Friday morning, at 167. The Punjab EPA’s own dashboard put the city at 236, with Multan Road touching 500 at 6am and 91 two hours later.

Officials blamed weak winds and a dip in temperature. That is a fair account of the weather and a revealing one. The weather did not make the smoke. It only declined to carry it away.

The real question is narrower than “why is Lahore polluted?” Most of the sources are known months in advance. The World Bank’s 2025 appraisal for Punjab puts Greater Lahore’s annual average PM 2.5 at about 87 micrograms per cubic meter, against a WHO guideline of 5 and Punjab’s own standard of 15.

That is not a seasonal number. So why does the response people can see arrive only after the air has turned?

Start with what winter does. On a cold, still night, the ground cools, and so does the air touching it, while the air above stays warmer. That warm layer acts as a lid, and with little wind to stir things, whatever is emitted near the surface stays there.

A study of winter smog over Lahore published this year by Ghani and colleagues finds that inversions, weak winds, and near-saturated humidity compound rising emissions. Research on the Indo-Gangetic Plain also links low winds and shallow mixing layers to high PM 2.5 levels.

A lid needs something underneath it.

Last winter was a rough experiment. In November 2025, Lahore’s daily peak PM 2.5 was 237 micrograms per cubic meter, down from 539 a year earlier, with no day above 300 on the AQI scale, according to the citizen-led Pakistan Air Quality Initiative (PAQI).

The provincial government credits its enforcement drive for 2025’s fall in Lahore’s PM 2.5 from 102 to 89. PAQI credits the lower peaks primarily to favorable weather.

The month still breached the national standard every day. Both explanations can be true, which is the uncomfortable part: a city whose worst days depend on the wind has not yet cut what it puts into the air.

Who is putting it there is contested. World Bank modelling attributes 23 per cent of Punjab’s PM2.5 to household fuel, 16 per cent to transport, 16 per cent to industry, 13 per cent to agriculture and livestock, and 7 per cent to waste burning.

For Greater Lahore, the bank assigns 28 percent to households and 24 percent to transport. In an August judgment, Justice Shahid Karim of the Lahore High Court put vehicles at 45 percent of the city’s pollution.

Researchers writing in Dawn last month noted that Pakistan still lacks comparable source-apportionment studies. None of these figures makes crop burning the whole story. The bank estimates that 6 to 7 million tonnes of rice straw are burned each year: a serious problem, but a seasonal one.

Sort this year’s measures by when they act, and a pattern appears.

Smog guns, water bowsers, and road sprinklers respond to pollution readings. The EPA’s director general told staff in July to run the guns wherever particulate levels rise.

Action against kilns and factories works on sources and has continued throughout the year. From 1 January to 25 July, the EPA reported 45,736 kiln visits, 777 demolitions, and 419 sealings. That is prevention, and it deserves the word.

The same tally shows 3,930 vehicles tested across Punjab, with 13 failing. Lahore alone has some 7.4 million registered vehicles, 82 percent of them two-wheelers that the World Bank noted were excluded from inspection.

The Bank adds that the actual fleet is probably smaller. Even so, the gap is one of scale, not effort.

The language has shifted. In July, the EPA’s director general said preventive action beats reactive measures, and the province issued a Pre-Smog Action Plan for July to September.

A plan with an end date still treats clean air as a campaign.

The World Bank’s $300 million Punjab Clean Air Programme, approved in March 2025 for the 13 million people of the Lahore Division, is the largest preventive bet on the table.

It pays for electric buses, rice-straw machinery, monitors, fuel testing, vehicle inspections, and a buyback of old vehicles. Its headline goal is a 35 percent cut in PM 2.5 over a decade.

The appraisal is more careful: 35 percent is the bank’s Pakistan-wide target, while this operation aims to lower Greater Lahore’s exposure by about 2.4 micrograms against a projected 2030 baseline near 100 and by up to 7 by 2035.

Industry is to be studied now and tackled in a later phase; household fuel is not among its results areas. The Bank also describes Punjab’s environment department as under-resourced.

Costs are harder to pin down. The Bank’s climate report put the economic losses from air pollution at 6.5 percent of GDP a year, while its Punjab appraisal valued the 2019 health burden of PM2.5 at about 9 percent. These measure different things and cannot be added.

The whole Punjab program that the loan sits within is budgeted at $847 million over five years. I could not find a published comparison of what removing a unit of pollution at source costs against what it costs in hospital beds and lost days.

Some of this air was never Lahore’s. World Bank modelling finds that 53 percent of Punjab’s PM 2.5 in 2021 came from inside the province, 9 percent from other provinces, and 13 percent from other countries.

It also estimates that about 30 percent of Indian Punjab’s pollution comes from Pakistan, because winds mostly blow from the southeast. Nobody can say from those figures how much of Friday’s reading crossed a border.

Until data are shared across the border, two sets of officials will watch two sets of dashboards over the same air.

The year has also added a shock of its own. Since the Iran war disrupted LNG supplies, Pakistan has been running furnace-oil power plants at full capacity, the power minister said in April.

Nothing published yet shows whether that reaches Lahore’s air. It does show that emissions answer to events, no anti-smog squad controls.

Islamabad, meanwhile, was still drafting an implementation plan for its 2023 clean-air policy in August.

Lahore does not have a winter smog problem. It has an emissions problem that runs all year and becomes visible when the wind drops.

Calling it a season lets us treat it as weather, something that arrives, is endured, and leaves. But the sources were all there in the first days of October, and they will be there in June when nobody is watching the dashboard.

A city that looks at its air only when the numbers turn dangerous has decided when to care.

Why should Lahore have to wait for winter to remember its air?

The writer is an Aitchison College student focusing on civic, social, and environmental affairs in Pakistan.