deiG Hong Kong Air Quality Indices

2025-04-02 18:18 🔄

Urban core 港九市區	Whole territories 全境
47 Good	52 Fair

	Location		AQI	Level	Dom.
HK	Central/Western	中西區	46	Good	PM₂₅
	PM₂₅ O₃ PM₁₀ NO₂ SO₂ μg/m³ 11.7 88.3 22.0 40.3 1.1 iAQI 49 36 20 20 1
	Eastern	東區	48	Good	PM₂₅
	PM₂₅ O₃ NO₂ PM₁₀ SO₂ μg/m³ 12.8 88.6 42.7 19.7 0.8 iAQI 52 36 21 18 0
	Southern	南區	49	Good	PM₂₅
	PM₂₅ O₃ PM₁₀ NO₂ SO₂ μg/m³ 11.7 110.9 16.2 15.1 4.4 iAQI 49 45 15 7 2
Kln	Sham Shui Po	深水埗	51	Fair	PM₂₅
	PM₂₅ NO₂ O₃ PM₁₀ SO₂ μg/m³ 14.5 66.9 64.1 23.5 3.1 iAQI 55 33 26 22 2
	Kwun Tong	觀塘	42	Good	PM₂₅
	PM₂₅ O₃ NO₂ PM₁₀ SO₂ μg/m³ 10.8 74.9 49.0 16.6 1.0 iAQI 45 30 24 15 1
New Territories	Tung Chung	東涌	74	Fair	PM₂₅
	PM₂₅ O₃ PM₁₀ NO₂ SO₂ μg/m³ 27.1 104.6 38.2 46.6 4.1 iAQI 82 42 35 23 2
	Tuen Mun	屯門	74	Fair	PM₂₅
	PM₂₅ PM₁₀ O₃ NO₂ SO₂ μg/m³ 26.8 47.9 102.2 57.3 6.5 iAQI 82 44 41 28 3
	Yuen Long	元朗	57	Fair	PM₂₅
	PM₂₅ O₃ PM₁₀ NO₂ SO₂ μg/m³ 18.0 85.3 30.3 56.6 2.5 iAQI 63 34 28 28 1
	Tsuen Wan	荃灣	52	Fair	PM₂₅
	PM₂₅ O₃ NO₂ PM₁₀ SO₂ μg/m³ 15.7 66.0 51.7 22.0 2.9 iAQI 58 27 25 20 2
	Kwai Chung	葵涌	51	Fair	PM₂₅
	PM₂₅ NO₂ PM₁₀ O₃ SO₂ μg/m³ 12.3 95.7 19.3 37.8 4.1 iAQI 51 47 18 15 2
	North	北區	44	Good	O₃
	O₃ PM₂₅ PM₁₀ NO₂ SO₂ μg/m³ 114.3 7.7 27.0 37.7 1.8 iAQI 46 32 25 19 1
	Tai Po	大埔	56	Fair	PM₂₅
	PM₂₅ O₃ PM₁₀ NO₂ SO₂ μg/m³ 13.6 130.1 22.2 30.9 3.6 iAQI 53 53 21 15 2
	Sha Tin	沙田	45	Good	O₃
	O₃ PM₂₅ PM₁₀ NO₂ SO₂ μg/m³ 117.2 8.8 13.2 17.0 2.9 iAQI 47 37 12 8 2
	Tseung Kwan O	將軍澳	40	Good	O₃
	O₃ PM₂₅ PM₁₀ NO₂ SO₂ μg/m³ 106.1 7.3 18.6 13.3 4.4 iAQI 43 30 17 7 2
rural	Tap Mun	塔門	43	Good	O₃
	O₃ PM₂₅ PM₁₀ NO₂ SO₂ μg/m³ 106.1 9.2 13.1 10.3 1.7 iAQI 43 38 12 5 1
roadside	Central	中環	53	Fair	PM₂₅
	PM₂₅ NO₂ PM₁₀ O₃ SO₂ μg/m³ 14.7 87.2 23.8 39.9 2.8 iAQI 56 43 22 16 2
	Causeway Bay	銅鑼灣	57	Fair	PM₂₅
	PM₂₅ NO₂ PM₁₀ O₃ SO₂ μg/m³ 17.4 75.2 34.9 37.1 2.9 iAQI 62 37 32 15 2
	Mong Kok	旺角	62	Fair	PM₂₅
	PM₂₅ NO₂ PM₁₀ O₃ SO₂ μg/m³ 17.4 112.3 27.7 25.8 3.7 iAQI 62 56 26 10 2

History & Stats

Locations of Stations

Based on:

• Raw pollutant readings taken from the Environmental Protection Department's Air Quality Monitoring Network;
• The United States Environmental Protection Agency's standard, for individual pollutant scaling;
• deiG's proprietary algorithm derived from the University of Hong Kong's Hedley Environmental Index, for AQI calculation;
• Weather data from Hong Kong Observatory.

Contact: aqi@asc.hk

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