Jiangsu, Uchina
Si’an · Ubora wa hewa
Jumanne, 10 Nov · Asia/Shanghai
Si’an air quality
US air quality index
51Wastani
US EPA scale
- Nzuri0–50
- Wastani51–100Current category
- Hewa yenye madhara kwa makundi nyeti101–150
- Hewa yenye madhara151–200
- Hewa yenye madhara makubwa201–300
- Hatari301–500+
A higher US AQI indicates more air pollution and greater health concern. Categories and pollutant concentration units are different measures.
Understand the EPA scaleVichafuzi vyote
- PM1
- 20 µg/m³
- PM2.5
- 22 µg/m³
- PM10
- 22 µg/m³
- Ozoni
- 11 µg/m³
- Dioksidi ya nitrojeni
- 38 µg/m³
- Dioksidi ya salfa
- 7 µg/m³
- Monoksidi ya kaboni
- 318 µg/m³
- European AQI (separate scale)
- 2