Lahore AQI vs 10 Pakistani Cities: Who Has the Worst Air This October?

Faisalabad, not Lahore, has had the dirtiest air in Pakistan this October. Across every hourly reading from 1 to 23 October 2026, Faisalabad averaged 80.6 micrograms of PM2.5 per cubic metre, a US AQI of 169. Lahore averaged 66.4, an AQI of 159. Both are "Unhealthy", and both are more than four times the World Health Organization's 24-hour limit.

Lahore gets the headlines because it is the biggest city and it tops the global league tables on its worst nights. But when you measure eleven Pakistani cities the same way, hour after hour, the picture is a belt of four central Punjab cities breathing almost the same air, with Faisalabad at the top of it.

This is what our own readings show, how they compare with the official dashboard, and what the numbers mean for the next three months.

The short answer

• Dirtiest air in October 2026: Faisalabad, average AQI 169, with a worst single hour of 386 (Hazardous) on the morning of 21 October.
• Lahore: average AQI 159. Its air was unhealthy for sensitive groups in 88 percent of hours this month, and outright unhealthy in 59 percent.
• The Punjab belt: Faisalabad, Lahore, Gujranwala and Sialkot all averaged between 62 and 81 micrograms. Not one of them had a single day in October within the WHO 24-hour guideline.
• Cleanest: Quetta (AQI 71), Hyderabad (81) and Karachi (85). Even these are "Moderate", not "Good".
• This week changed everything: Lahore's weekly average jumped 67 percent between the week of 12 October and the week of 19 October. Faisalabad's nearly doubled.

Lahore AQI compared with 10 Pakistani cities

Ranked by average PM2.5 from 1 to 23 October 2026. AQI is calculated on the current US EPA scale, revised in February 2024.

"Hours unhealthy" is the share of October's hours with PM2.5 above 55.4, the point where the US scale stops saying "for sensitive groups" and starts saying "Unhealthy" for everyone. "Worst hour" covers 23 September to 23 October. Each city name links to its live reading.

Why Faisalabad is worse than Lahore

This is not a one-month quirk. IQAir's 2025 World Air Quality Report, which Pakistan's own Economic Survey 2025-26 cites, named Faisalabad the most polluted city in Pakistan for the year, at an annual average of 98.8 micrograms. Pakistan as a whole averaged 67.3 and was ranked the most polluted country in the world. Four of the world's ten most polluted cities were Pakistani: Lahore, Faisalabad, Rahim Yar Khan and Sukkur.

Faisalabad is Pakistan's textile capital, and its smoke is as much industrial as it is traffic. In early October, before the smog season was formally under way, local reporting already described heavy dust and industrial emissions along Sargodha Road, with the Punjab dashboard putting the city between 132 and 160.

Lahore's problem is scale: more vehicles, more construction and more people exposed. Faisalabad's is concentration. In our readings Faisalabad was above the "unhealthy for sensitive groups" line in 91 percent of October's hours, the highest share of any city we track.

What changed this week

The Punjab government treats 15 October to 15 January as smog season, and this year the season arrived on schedule.

For the first three weeks of October, Lahore's air was slowly improving: a weekly average of 66.7 at the start of the month, 58.4 the next week, then 53.8. In the week beginning 19 October it jumped to 90.0.

The official station readings show the same turn, at higher levels. The Punjab Environmental Protection Agency's dashboard put Lahore at 265 in the early hours of 19 October and at 318, "Very unhealthy", late on 22 October, according to reporting of the dashboard figures. On 22 October IQAir's live ranking listed Lahore among the three most polluted major cities in the world.

Our worst Lahore hour was 172 micrograms, an AQI of 247, at 7:45am on 22 October. Faisalabad's worst was 268 micrograms, an AQI of 386, the morning before.

Why our numbers are lower than the dashboard

If you check the Punjab dashboard and then read this article, you will see two different numbers for the same city. Both are correct. They measure different things.

• The dashboard reports monitoring stations. Lahore's figure averages about eleven stations, some beside major roads and industrial areas. Station readings capture local peaks.
• Our readings are a city-wide estimate from a weather and air quality model, taken at the same coordinates every hour. They smooth out the worst street corners, so they run lower than the busiest stations.
• The scales differ too. Punjab's AQI labels the same number one category more gently than the US scale from 101 upward. We explain that in detail in how to read Pakistan's air quality index.

The value of our method is not the absolute number. It is that every city is measured the same way, at the same moments, which is what makes a fair comparison possible. A station beside a Lahore flyover and a station in a Quetta park cannot be ranked against each other. The same model at the same hour can.

City by city

Faisalabad

The worst average in Pakistan this month, 80.6 micrograms, and the steepest jump this week: its weekly average went from 63.1 to 121.8. Its worst day was 21 October, averaging 161.8 micrograms across the whole day.

Lahore

Second, at 66.4. The bigger risk for Lahore is not the monthly average but the mornings, when readings regularly double the afternoon level (more on that below). Today's Lahore reading shows the current figure alongside what it means for skin.

Gujranwala

Statistically almost level with Lahore at 64.8, and its worst hour, an AQI of 251, was slightly worse than Lahore's. Gujranwala rarely makes national news, which is exactly why residents should check it rather than assume.

Sialkot

61.9, and unusually steady: its last seven days were no worse than its October average. Its worst hour of the season came on 28 September, before the season officially started.

Multan

49.9, and climbing. Its last week averaged 61.7, and its worst day of the season was yesterday, 22 October. Southern Punjab is a few weeks behind the central belt, not spared from it.

Bahawalpur

41.0 on average, but also worsening, with its worst day on 22 October. IQAir ranked nearby Rahim Yar Khan among the world's ten most polluted cities in 2025, a reminder that south Punjab's winter can be severe.

Peshawar

37.9, with its worst spell in the first week of October, peaking on 7 and 8 October. Its last seven days were better than its monthly average, at 34.4.

Islamabad

35.9, just over the line into "unhealthy for sensitive groups". Its last seven days averaged 27.5, well below its October average. Islamabad and Peshawar are the two northern cities where the air improved as Punjab's smog season began.

Karachi

27.6, the cleanest of the large cities, thanks largely to sea breezes. But Karachi is moving the wrong way: its last seven days averaged 36.2, higher than the rest of the month, with its worst day on 16 October.

Hyderabad

25.0, and the only city in our comparison that did not record a single hour above 55.4 micrograms this month.

Quetta

The cleanest air we track, at 20.1, and the only city where some days were within the WHO 24-hour guideline: 8 of 23 days in October. That is still four times the WHO annual guideline.

When is Lahore's air cleanest?

Timing matters more than most people realise. Averaged across October, Lahore's air was worst between 6am and 9am, at 84.9 micrograms, and cleanest between 12pm and 3pm, at 42.3. That is a twofold difference within the same day.

The reason is a temperature inversion. On still winter nights, cold air settles at ground level under a layer of warmer air and traps smoke and dust like a lid. Once the sun warms the ground in the late morning, the lid lifts and pollution disperses. By evening it begins to settle again.

In practice:

1. Exercise outdoors between noon and 4pm, not at dawn, if you exercise outside at all during smog season.
2. Air the house in the early afternoon. Opening windows at 7am lets the worst air of the day in.
3. The school run is the worst hour. A well-fitted N95 on the walk to the car or gate does more than any indoor measure for that window.
4. Check the reading before making plans, not the weather. A clear-looking morning can still read above 200.

What Punjab is doing about it

The Punjab Environmental Protection Agency issued a pre-smog action plan for 2026, which according to published summaries includes inspections of brick kilns, factories and stone crushers through the season. It has also urged schools, particularly in Lahore, to promote carpooling among students, parents and staff to cut morning traffic. Public schools have reportedly been told to check the AQI before outdoor activity and to keep classroom windows shut on bad days.

As of mid-October, no smog closure of schools had been ordered for 2026. Any closure needs an EPA order followed by a School Education Department notification, so check the official notification pages rather than social media forwards.

None of these measures changes what is in the air this week. They aim to stop it getting worse in November and December, which in Lahore's history are usually worse than October.

What this means for your skin

The same fine particles that make the headlines also reach the skin. PM2.5 generates oxidative stress at the surface and, with long exposure, is associated with dullness, uneven pigmentation and a weaker skin barrier. For anyone in the Punjab belt this season, the practical thresholds are simple:

• Below 100: your normal routine is fine.
• 100 to 150: cleanse every evening without fail. In Faisalabad, Lahore, Gujranwala and Sialkot this is now nearly every day.
• Above 150: pause exfoliating acids and retinoids if your skin is already reactive, and put barrier repair first.
• Every day, smog or not: sunscreen. Haze scatters light; it does not stop UV.

We go deeper on each of these in what Lahore's smog actually does to skin, how to tell if your skin barrier is damaged, and whether an air purifier helps your skin.

"My skin is worse every winter" can mean a depleted barrier, aggravated acne, worsening pigmentation or a genuine allergy, and each needs a different response. If you want to know which one it is for you, that is what our skin assessment is for: send photographs and the products you use, and a certified aesthetics practitioner tells you what is happening and what to change first.

How we measured

• What: PM2.5 concentration in micrograms per cubic metre, from WeatherAPI.com's air quality data, which we collect for every city on our air quality pages.
• When: every reading from 1 to 23 October 2026, roughly every hour, about 620 readings per city. Weekly figures run from 23 September.
• Where: one fixed point per city, the same coordinates every time.
• AQI: converted from PM2.5 using the US EPA breakpoints as revised in February 2024, which set "Good" at 9.0 micrograms or below. Older converters still use 12.0 and will show slightly lower AQI numbers for the same air.
• WHO guidelines: 15 micrograms averaged over 24 hours, and 5 averaged over a year.

We will update this comparison as the season develops. The live figures for each city are always on its air quality page.