deiG Hong Kong Air Quality Indices

2025-11-17 15:28 🔄

Urban core 港九市區	Whole territories 全境
61 Fair	68 Fair

	Location		AQI	Level	Dom.
HK	Central/Western	中西區	62	Fair	PM₂₅
	PM₂₅ O₃ PM₁₀ NO₂ SO₂ μg/m³ 19.2 118.8 35.7 35.3 6.3 iAQI 65 49 33 18 3
	Eastern	東區	57	Fair	PM₂₅
	PM₂₅ O₃ PM₁₀ NO₂ SO₂ μg/m³ 16.9 103.0 35.5 48.6 2.5 iAQI 60 42 33 24 1
	Southern	南區	55	Fair	O₃
	O₃ PM₂₅ PM₁₀ NO₂ SO₂ μg/m³ 128.7 13.0 26.8 24.8 4.5 iAQI 53 52 25 12 2
Kln	Sham Shui Po	深水埗	64	Fair	PM₂₅
	PM₂₅ O₃ PM₁₀ NO₂ SO₂ μg/m³ 21.0 103.8 34.3 57.2 6.4 iAQI 69 43 32 29 3
	Kwun Tong	觀塘	60	Fair	PM₂₅
	PM₂₅ O₃ PM₁₀ NO₂ SO₂ μg/m³ 19.1 94.6 32.5 50.4 2.0 iAQI 65 39 30 25 1
New Territories	Tung Chung	東涌	83	Poor	PM₂₅
	PM₂₅ PM₁₀ O₃ NO₂ SO₂ μg/m³ 31.3 51.6 99.4 44.2 2.1 iAQI 91 48 41 22 1
	Tuen Mun	屯門	84	Poor	PM₂₅
	PM₂₅ O₃ PM₁₀ NO₂ SO₂ μg/m³ 30.9 137.9 49.3 56.0 8.0 iAQI 90 57 46 28 4
	Yuen Long	元朗	78	Poor	PM₂₅
	PM₂₅ O₃ PM₁₀ NO₂ SO₂ μg/m³ 27.3 146.4 44.4 30.9 3.4 iAQI 83 60 41 16 2
	Tsuen Wan	荃灣	63	Fair	PM₂₅
	PM₂₅ O₃ PM₁₀ NO₂ SO₂ μg/m³ 20.7 101.2 31.1 56.0 4.0 iAQI 69 42 29 28 2
	Kwai Chung	葵涌	66	Fair	PM₂₅
	PM₂₅ O₃ PM₁₀ NO₂ SO₂ μg/m³ 22.4 108.1 34.8 60.3 3.4 iAQI 72 45 32 30 2
	North	北區	73	Fair	PM₂₅
	PM₂₅ O₃ PM₁₀ NO₂ SO₂ μg/m³ 23.6 150.0 36.1 31.4 4.1 iAQI 75 62 33 16 2
	Tai Po	大埔	76	Poor	PM₂₅
	PM₂₅ O₃ PM₁₀ NO₂ SO₂ μg/m³ 25.5 151.5 40.7 32.4 7.8 iAQI 79 62 38 16 4
	Sha Tin	沙田	73	Fair	PM₂₅
	PM₂₅ O₃ PM₁₀ NO₂ SO₂ μg/m³ 21.3 168.2 33.4 21.0 4.2 iAQI 70 69 31 11 2
	Tseung Kwan O	將軍澳	61	Fair	O₃
	O₃ PM₂₅ PM₁₀ NO₂ SO₂ μg/m³ 140.4 15.6 32.2 11.1 6.5 iAQI 58 58 30 6 4
rural	Tap Mun	塔門	74	Fair	PM₂₅
	PM₂₅ O₃ PM₁₀ NO₂ SO₂ μg/m³ 21.8 169.3 36.0 5.5 2.8 iAQI 71 70 33 3 2
roadside	Central	中環	82	Poor	PM₂₅
	PM₂₅ NO₂ PM₁₀ O₃ SO₂ μg/m³ 29.0 122.7 44.5 43.9 5.6 iAQI 86 63 41 18 3
	Causeway Bay	銅鑼灣	84	Poor	PM₂₅
	PM₂₅ NO₂ PM₁₀ O₃ SO₂ μg/m³ 31.9 104.7 47.9 43.6 5.7 iAQI 93 53 44 18 3
	Mong Kok	旺角	71	Fair	PM₂₅
	PM₂₅ NO₂ PM₁₀ O₃ SO₂ μg/m³ 24.0 107.6 38.9 62.1 4.2 iAQI 76 55 36 26 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

 Connecting...