---
title: "KL Now The World’s Most Polluted City As Haze Worsens"
url: https://weirdkaya.com/kl-now-the-worlds-most-polluted-city-as-haze-worsens/
date: 2026-10-07
modified: 2026-10-07
lang: en
author: "Yu Ang Tan"
description: "Kuala Lumpur has once again climbed to the top of the world’s pollution ranking as haze continues to blanket large parts of Malaysia. According to IQAir’s live global major city..."
categories:
  - "Society"
tags:
  - "#Trending"
  - "haze"
  - "KL"
  - "KL Most Polluted City"
  - "Malaysia"
  - "Polluted City"
image: https://cdn.weirdkaya.com/media/KL-Now-The-Worlds-Most-Polluted-City-As-Haze-Worsens.png
word_count: 358
---

# KL Now The World’s Most Polluted City As Haze Worsens

## TL: DR

- **IQAir ranks KL:** Kuala Lumpur tops the global air pollution list on Oct 7 with a very unhealthy US AQI reading of 210 to 214.
- **PM2.5 drives pollution:** IQAir data identifies PM2.5 as the main pollutant in Kuala Lumpur, reaching approximately 138 µg/m³ at around 9am.
- **Official API readings:** Malaysia's Department of Environment reports unhealthy air at 32 of 68 stations nationwide, with Batu Pahat hitting 197 and Cheras at 189.

**Kuala Lumpur has once again climbed to the top of the world’s pollution ranking as haze continues to blanket large parts of Malaysia.**

According to [IQAir’s live global major city ranking on Oct 7](https://www.iqair.com/qa/world-air-quality-ranking?utm_source=chatgpt.com), Kuala Lumpur was ranked No. 1 in the world for air pollution, with a US AQI reading of around 210 to 214 during the morning.

That puts the capital firmly in the “very unhealthy” category, which covers AQI readings between 201 and 300.

![AQI Reading Malaysia Kuala Lumpur 1007](https://cdn.weirdkaya.com/media/268379_AQI-Reading-Malaysia-Kuala-Lumpur-1007.png)Screengrab via[ IQAir](https://www.iqair.com/world-air-quality)

## KL ahead of other major polluted cities

![Haze Malaysia 1007](https://cdn.weirdkaya.com/media/268382_Haze-Malaysia-1007.png)Photo via Canva.

At the time of the ranking, Kuala Lumpur’s reading was significantly higher than several other major cities.

[IQAir’s live list placed Kuala Lumpur first,](https://www.iqair.com/world-air-quality) followed by cities including Dhaka, Kolkata, Singapore and Delhi, although rankings can shift throughout the day as air quality changes.

The user-shared IQAir screenshot taken between 11am and noon similarly showed Kuala Lumpur in first place with a US AQI of **210**, ahead of Singapore at 176, Dhaka at 173, Delhi at 165 and Lahore at 164.

## PM2.5 is the main pollutant

IQAir data showed that **PM2.5** was the main pollutant affecting Kuala Lumpur.

At around 9am, the capital recorded a US AQI of **213**, with PM2.5 concentrations reaching approximately **138 µg/m³**.

![AQI Reading Malaysia Kuala Lumpur 1007](https://cdn.weirdkaya.com/media/268379_AQI-Reading-Malaysia-Kuala-Lumpur-1007.png)Screengrab via[ IQAir](https://www.iqair.com/world-air-quality)

PM2.5 refers to tiny airborne particles small enough to penetrate deep into the lungs, and prolonged exposure can pose health risks, particularly for children, the elderly and those with respiratory or heart conditions.

## Malaysia’s official API also remains unhealthy

Malaysia’s official Department of Environment readings use the Air Pollutant Index, or API, which is calculated differently from IQAir’s US AQI.

**As of 9am on Oct 7, 32 out of 68 monitoring stations nationwide were recording unhealthy air quality.**

Cheras recorded an API of **189**, while another Kuala Lumpur monitoring station stood at 177. Nearby areas were also badly affected, with Johan Setia at 190, Petaling Jaya at 176 and Putrajaya at 187.

Batu Pahat recorded the country’s highest official API reading at **197** that morning.

Under Malaysia’s API classification, readings from 101 to 200 are unhealthy, 201 to 300 are very unhealthy, while anything above 300 is considered hazardous.