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IQAir 2022 survey ranked Lahore the world's most polluted major city by annual PM2.5

Dated 14 March 2023: IQAir 2022 survey ranked Lahore the world's most polluted major city by annual PM2.5. In the causal graph this event weakens Air Pollution, a driver that strengthens Exposed to air pollution — an improving welfare path.

Who was responsible

Contribution type and responsibility level for each recorded actor — not sole-author shorthand.

No public contributors are listed for this fact.

What changed

Fact → Driver → Indicator. Relationship strength orders the paths; it is not the observed indicator movement.

    1. FactIQAir 2022 survey ranked Lahore the world's most polluted major city by annual PM2.5
    2. weakensDriverAir Pollution
    3. strengthensIndicators (2)Exposed to air pollution
    Improving path

    provisional weight · verified

    • Exposed to air pollution

      via Air Pollution

      Better

      Strengthens · 88% impact strength (driver → indicator)

      Observed

      95.9% of population · 3.28 below the normal line (2020)

      Better than normal

      3 readings, 2018–2020: fell from 97.6% of population to 95.9% of population.

      Above normal = worse

    • Age-standardised mortality rate from diseases of the circulatory system

      via Air Pollution

      Better

      Strengthens · 76% impact strength (driver → indicator)

      Observed

      403 deaths per 100,000 population · 164 above the normal line (2023)

      Worse than normal

      6 readings, 2018–2023: fell from 435 deaths per 100,000 population to 403 deaths per 100,000 population.

      Above normal = worse

Causal path

How this event connects to drivers and indicators in the graph.

  1. FactIQAir 2022 survey ranked Lahore the world's most polluted major city by annual PM2.5
  2. weakensDriverAir Pollution
  3. strengthensIndicatorExposed to air pollution

Cite this page

Factrail. (2026). IQAir 2022 survey ranked Lahore the world's most polluted major city by annual PM2.5. Factrail. https://factrail.ai/facts/lahore-iqair-most-polluted-city-2022

https://factrail.ai/facts/lahore-iqair-most-polluted-city-2022

Accessed 15 October 2026.

By the Factrail desk · Method: how we source and score · Last reviewed

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