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Air quality in Hong Kong SAR

Air quality index (AQI⁺) and PM2.5 air pollution in Hong Kong SAR • 15:46, Apr 18

Live most polluted city ranking

Real-time Hong Kong SAR most polluted city ranking

#CitiesAQI⁺ US
1
The national flag of Hong Kong SAR

Tai Po

152

2
The national flag of Hong Kong SAR

Hong Kong

145

2025 Hong Kong SAR most polluted city

Hong Kong, Hong Kong SAR

63

Live cleanest city ranking

Real-time Hong Kong SAR cleanest city ranking

#CitiesAQI⁺ US
1
The national flag of Hong Kong SAR

Tai Po

136

2
The national flag of Hong Kong SAR

Hong Kong

152

2025 Hong Kong SAR cleanest city

Hong Kong, Hong Kong SAR

63

2025 country air quality average

How polluted is Hong Kong SAR?

IQAir exclamation icon

PM2.5 concentration is currently 3.1 times the World Health Organization annual PM2.5 guideline value.

2025 AQI⁺ country ranking

Which country had the worst air quality in 2025?

#CountryPopulationAQI⁺ US
1
The national flag of Hong Kong SAR

Pakistan

231,402,117

159

2
The national flag of Hong Kong SAR

Bangladesh

169,356,251

158

3
The national flag of Hong Kong SAR

Tajikistan

9,750,064

152

4
The national flag of Hong Kong SAR

Chad

17,179,740

146

5
The national flag of Hong Kong SAR

Democratic Republic of the Congo

95,894,118

137

6
The national flag of Hong Kong SAR

India

1,407,563,842

134

7
The national flag of Hong Kong SAR

Kuwait

4,250,114

126

8
The national flag of Hong Kong SAR

Uganda

45,853,778

119

9
The national flag of Hong Kong SAR

Egypt

109,262,178

114

10
The national flag of Hong Kong SAR

Uzbekistan

34,915,100

107

63
The national flag of Hong Kong SAR

Hong Kong SAR

7,413,100

63

Worldwide PM2.5 ranking

2025 Hong Kong SAR global rank in air pollution

63/143

Polluted skies of Hong Kong
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April 18, 2026: Hong Kong among top 10 most polluted cities in the world

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China Air Quality Alert

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Southeast Asia Air Quality Alert

Which is the most polluted state in Hong Kong SAR?