Air Quality in Yuen Long Kau Hui Today — Live AQI, PM2.5 & PM10, Smog, Weather and Forecast

The latest data Last 7 days
Latest air quality data: Yuen Long Kau Hui
Locations: Hong Kong » Yuen Long Kau Hui
Pollution and air quality forecast for Yuen Long Kau Hui. Today is Thursday, August 27, 2026. The following air pollution values have been recorded for Yuen Long Kau Hui:
  1. particulate matter (PM2.5) dust - 22 (Moderate)
  2. particulate matter (PM10) suspended dust - 24 (Moderate)
  3. ozone (O3) - 26 (Good)
  4. nitrogen dioxide (NO2) - 62 (Moderate)
  5. sulfur dioxide (SO2) - 31 (Good)
  6. carbon monoxide (CO) - 336 (Good)
Real-time Air Quality Index (AQI) for Yuen Long Kau Hui, Thursday, August 27, 2026: 2.

air quality index: 1
AQI 2 Moderate

What is the air quality in Yuen Long Kau Hui today? Is the air polluted in Yuen Long Kau Hui?. Is there smog?

Today (Thursday, August 27, 2026) air quality is moderate in Yuen Long Kau Hui. Some pollutants in Yuen Long Kau Hui may slightly affect very few hypersensitive individuals. Air pollutants in Yuen Long Kau Hui may cause minor breathing discomfort to sensitive people.


What is the current level of PM2.5 in Yuen Long Kau Hui? (particulate matter (PM2.5) dust)
Today's PM2.5 level is: 22 (Moderate) For comparison, the highest level of PM2.5 in Yuen Long Kau Hui in the last 7 days was: 30 (Sunday, August 23, 2026) and the lowest: 15 (Thursday, August 20, 2026).

What is the level of PM10 today in Yuen Long Kau Hui? (particulate matter (PM10) suspended dust)
The current level of particulate matter PM10 in Yuen Long Kau Hui is: 24 (Moderate)

How is the O3 level today in Yuen Long Kau Hui? (ozone (O3))
26 (Good)

How high is the level of NO2? (nitrogen dioxide (NO2))
62 (Moderate)

What is the level of SO2 pollution? (sulfur dioxide (SO2))
31 (Good)

How high is the CO level? (carbon monoxide (CO))
336 (Good)



Current data Thursday, August 27, 2026 at 9:00 AM

PM2,5 22 (Moderate)

PM10 24 (Moderate)

O3 26 (Good)

NO2 62 (Moderate)

SO2 31 (Good)

CO 336 (Good)

Data on air pollution from recent days in Yuen Long Kau Hui

index 2026-08-27 2026-08-26 2026-08-25 2026-08-24 2026-08-23 2026-08-22 2026-08-21 2026-08-20
pm25 22
Moderate		 22
Moderate		 20
Moderate		 20
Moderate		 30
Moderate		 28
Moderate		 21
Moderate		 15
Moderate
pm10 25
Moderate		 26
Moderate		 24
Moderate		 23
Moderate		 34
Moderate		 32
Moderate		 25
Moderate		 18
Good
o3 44
Good		 38
Good		 51
Good		 50
Good		 54
Good		 61
Good		 38
Good		 50
Good
no2 54
Moderate		 50
Moderate		 43
Moderate		 43
Moderate		 54
Moderate		 57
Moderate		 48
Moderate		 38
Good
so2 31
Good		 34
Good		 32
Good		 29
Good		 31
Good		 33
Good		 40
Good		 34
Good
co 314
Good		 294
Good		 285
Good		 257
Good		 433
Good		 365
Good		 376
Good		 299
Good
data source »

Yuen Long Kau Hui

Thursday, August 27, 2026 at 9:00 AM

PM2,5 22 (Moderate)

particulate matter (PM2.5) dust

PM10 24 (Moderate)

particulate matter (PM10) suspended dust

O3 26 (Good)

ozone (O3)

NO2 62 (Moderate)

nitrogen dioxide (NO2)

SO2 31 (Good)

sulfur dioxide (SO2)

CO 336 (Good)

carbon monoxide (CO)

Yuen Long Kau Hui

index 2026-08-20 2026-08-21 2026-08-22 2026-08-23 2026-08-24 2026-08-25 2026-08-26 2026-08-27
pm25 15 21 28 30 20 20 22 22
pm10 18 25 32 34 23 24 26 25
o3 50 38 61 54 50 51 38 44
no2 38 48 57 54 43 43 50 54
so2 34 40 33 31 29 32 34 31
co 299 376 365 433 257 285 294 314

* Pollution data source: https://openaq.org () The data is licensed under CC-By 4.0

🌦️ Weather · 16-day Forecast — Hong Kong

🌦️ WEATHER · 16-DAY FORECASTHong Kong🌧️30°RainToday · ↑32° ↓28°💨 7 km/h · 💧 75%Tue25.08🌧️32°28°Wed26.08🌧️29°27°Thu27.08🌧️27°24°Fri28.08🌧️30°26°Sat29.08🌧️31°28°Sun30.08🌧️29°28°Mon31.08🌧️29°27°Tue1.09🌧️29°27°Wed2.09🌧️30°27°Thu3.09🌧️30°26°Fri4.09🌧️29°26°Sat5.09🌧️30°27°Sun6.09🌧️30°28°Mon7.09☁️30°28°Tue8.09🌧️29°27°Wed9.09☀️28°27°pollution-alert.com · August 27, 2026

16-day weather forecast for Hong Kong: today around 32°C (rain), lows near 28°C. Daily temperature and conditions, updated every day. Strong wind (about 24 km/h) is actively clearing smog and dust away.

☀️ UV Index · 16-day Forecast — Hong Kong

☀️ UV INDEX · 16-DAY FORECASTHong Kong03681111+8.8UV VERY HIGHtoday, day maxSPF 50, long sleeves and shade between 10:00-16:00.⏱ Unprotected fair skin can burn in about 25 min9Wed26.088Thu27.089Fri28.089Sat29.089Sun30.089Mon31.089Tue1.099Wed2.099Thu3.099Fri4.099Sat5.098Sun6.098Mon7.098Tue8.098Wed9.097Thu10.090-2 low3-5 moderate6-7 high8-10 very high11+ extremepollution-alert.com · August 27, 2026

The UV index in Hong Kong today is 8.8 (very high) — unprotected fair skin can burn in about 25 minutes.

Frequently asked questions

Is the air safe to breathe in Yuen Long Kau Hui today?
The current average PM2.5 across Yuen Long Kau Hui is about 22 µg/m³, rated “Moderate”. Air quality is acceptable, but unusually sensitive people should limit prolonged outdoor exertion.
What is the current PM2.5 level in Yuen Long Kau Hui?
Right now PM2.5 in Yuen Long Kau Hui averages about 22 µg/m³ (“Moderate”). PM2.5 are fine particles small enough to reach the lungs and bloodstream.
Which day last week had the worst air in Yuen Long Kau Hui?
Over the past week, the highest daily PM2.5 in Yuen Long Kau Hui was recorded on Sunday, August 23 (about 30 µg/m³).
What is the UV index in Yuen Long Kau Hui today?
The UV index in Yuen Long Kau Hui today is 8.8 (very high) — unprotected fair skin can burn in about 25 minutes.
Does today's wind help disperse smog in Yuen Long Kau Hui?
Strong wind (about 24 km/h) is actively clearing smog and dust away.
How is air quality measured?
Air quality here is based on PM2.5 — the concentration of fine particulate matter in µg/m³. Lower values mean cleaner air. Data is updated daily from Open-Meteo.