| Air Quality Grade |
| First | Second | Third | Fourth | Fifth | Sixth |
|
| Air Quality Status |
| Excellent | Good | Slight Pollution | Moderate Pollution | Heavy Pollution | Severe Pollution |
|
| (AQI) | 0 | 50 | 100 | 150 | 200 | 300 | 400 | 500 |
| PM10 Density | 0 | 50 | 150 | 250 | 350 | 420 | 500 | 600 |
| PM2.5 Density | 0 | 35 | 75 | 115 | 150 | 250 | 350 | 500 |