Air Quality Index (AQI) in Siu Lek Yuen, Hong Kong 🇭🇰
Air quality in Siu Lek Yuen is currently 65 on the US AQI scale, rated Moderate.
Health Recommendations for Siu Lek Yuen Residents
Air quality is acceptable. However, for some pollutants there may be a moderate health concern for a very small number of people. Sensitive groups should consider reducing prolonged outdoor exertion.
Siu Lek Yuen Air Pollution: Detailed Pollutant Breakdown
Siu Lek Yuen's Main Air Pollutant Today
The main concern in Siu Lek Yuen right now is NO2 at 47.8 µg/m³, about 1.9x the WHO 24-hour guideline.
Air Quality Health Advice for Siu Lek Yuen
| General public | Air quality is acceptable for most people. Outdoor activity is fine. |
|---|---|
| Sensitive groups | Unusually sensitive people should consider easing prolonged or heavy exertion outdoors. |
Air Quality in Other Cities in Hong Kong
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Frequently Asked Questions about Air Quality in Siu Lek Yuen
What is the air quality (AQI) in Siu Lek Yuen right now?
The current air quality index in Siu Lek Yuen is 65 — categorised as Moderate.
Is the air in Siu Lek Yuen safe to breathe today?
Today's air quality in Siu Lek Yuen is rated Moderate on the US EPA scale.
What is the PM2.5 level in Siu Lek Yuen right now?
The fine-particle (PM2.5) concentration in Siu Lek Yuen is currently 16.6 µg/m³. PM2.5 is the most health-relevant pollutant — the WHO 24-hour guideline is 15 µg/m³.
What is the PM10 level in Siu Lek Yuen right now?
The coarse-particle (PM10) concentration in Siu Lek Yuen is currently 18.3 µg/m³.
What is the main pollutant in Siu Lek Yuen right now?
The dominant pollutant in Siu Lek Yuen right now is Carbon Monoxide (CO) at 225.0 µg/m³.
Is it safe to exercise outdoors in Siu Lek Yuen today?
With air quality currently rated Moderate, outdoor exercise in Siu Lek Yuen is generally considered safe for most people.
How to Read the Air Quality Index for Siu Lek Yuen
Air is fresh and healthy. Safe for all outdoor activities.
Acceptable air quality, though sensitive groups should monitor comfort.
Vulnerable groups (children, elderly) should limit outdoor exertion.
Everyone begins to experience health effects. Stay indoors where possible.
Significant health impact for entire population. Emergency conditions.
Serious health alert: everyone may experience serious life-threatening effects.
Fine particles are at minimal, safe levels. Air is optimal.
Acceptable air, but haze may be present in urban areas.
Individuals with heart or lung disease should limit activity.
Particulate levels high enough to cause respiratory irritation.
Heavy haze. High risk to cardiovascular health for the public.
Lethal particulate concentrations. Critical neurological and lung risk.
Low levels of dust and coarse particles. Environment is safe.
Coarse particles may trigger coughing in sensitive groups.
Visible dust pollution. Sensitive groups should avoid heavy labor.
Widespread respiratory impacts likely for the population.
Dangerous dust and debris levels. Significant warnings issued.
Extremely high concentrations. Stay inside with filtration.
Surface ozone levels are within a safe, natural range.
Acceptable air, but sensitive individuals may feel chest tightness.
Rising ozone can trigger airway inflammation in active children.
Avoid heavy outdoor work during the hottest part of the day.
Serious lung function reduction likely across the public.
Emergency ozone levels. Risk of permanent lung tissue damage.
Nitrogen levels are optimal. Safe for everyone.
Typical background levels for high-density urban areas.
Increased risk of respiratory infections for vulnerable groups.
Significant airway inflammation likely near traffic zones.
Acute respiratory distress potential. High-risk groups stay indoors.
Toxic concentrations. Immediate health precautions required.
Carbon Monoxide levels are clean and non-toxic.
Acceptable; may affect those with specific heart conditions.
Reduced oxygen delivery to the heart may occur.
Headaches and fatigue may occur in urban canyons.
Significant cardiovascular distress. Mental confusion possible.
Lethal potential. Immediate risk of neurological collapse.
Optimal air quality with no sulfur detection.
Acceptable air; minor odors possible near industry.
Bronchoconstriction possible for active asthmatics.
Respiratory distress likely for the wider population.
Significant wheezing and shortness of breath likely.
Extreme respiratory danger. Significant life risk.
Health & Scientific Resources
→ How to read US EPA Air Quality Index before going outside → Understanding Air Quality Index levels and what they mean → When haze forms and what it does to air qualityHow is this AQI calculated?
The primary Air Quality Index (AQI) shown above is calculated using the US EPA Linear Interpolation formula based on PM2.5 concentration (Fine Particulate Matter).
- Current PM2.5: 16.6 µg/m³
- Calculation: Your city falls into the "Moderate" category (Category 2).
Note: While several pollutants (O3, NO2, SO2) are monitored, PM2.5 is used as the primary "driver" for the main index value as it typically represents the highest health risk.
Frequently Asked Questions
What is the main cause of air pollution in Siu Lek Yuen?
Pollution in Siu Lek Yuen is primarily driven by 19.4 km/h SSW winds, local traffic emissions, and industrial activity, which influence the current PM2.5 concentration of 16.6 µg/m³.
Is the AQI in Siu Lek Yuen safe today?
Today's AQI is 65, which is categorized as Moderate. This means the air quality is moderate for the general population.