Tuen Mun, Hong Kong
Butterfly · Air quality
Tuesday, 3 Nov · Asia/Hong Kong
Butterfly air quality
US air quality index
113E no good for sensitive people
US EPA scale
- Good0–50
- Moderate51–100
- E no good for sensitive people101–150Current category
- E no good for health151–200
- E bad well well for health201–300
- Dangerous301–500+
A higher US AQI indicates more air pollution and greater health concern. Categories and pollutant concentration units are different measures.
Understand the EPA scaleAll pollutants
- PM1
- 33 µg/m³
- PM2.5
- 36 µg/m³
- PM10
- 38 µg/m³
- Ozone
- 16.3 µg/m³
- Nitrogen dioxide
- 72.3 µg/m³
- Sulfur dioxide
- 36.3 µg/m³
- Carbon monoxide
- 469 µg/m³
- European AQI (separate scale)
- 4