Turn an air quality index value into a health impact level with outdoor activity advice for polluted days.
PM2.5 估算为经验公式,非官方换算。
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Sub-index levels | IAQI 6 bands | GB 3095-2012 |
| AQI computation | AQI = max(IAQIi) | HJ 633-2012 |
| Primary pollutant | Max IAQI pollutant | HJ 633-2012 |