Enter concentrations of the six criteria pollutants to compute the AQI and identify the primary pollutant under China's HJ 633-2012 standard, with health guidance for each AQI band. Enter CO in mg per cubic metre.
| Item | Formula / Note | Source / Standard |
|---|---|---|
| AQI method | Piecewise linear interpolation | HJ 633-2012 |
| Primary pollutant | Max IAQI among pollutants | HJ 633-2012 §4 |
| PM2.5 limits | 35 (class I) / 75 (class II) μg/m³ | GB 3095-2012 |
| AQI levels | 0–50 good to >300 severe | HJ 633-2012 Table 1 |
| O3 8h maximum | Daily max 8-h moving average | HJ 633-2012 §5 |
| Health guidance | >200 stop outdoor exercise | HJ 633 Appendix C |
空气质量指数(AQI)计算器,依据国家标准 HJ 633-2012,输入 PM2.5、PM10、SO₂、NO₂、CO、O₃ 六项污染物浓度,计算各污染物 IAQI 与综合 AQI,识别首要污染物并给出健康建议。