Air Quality | Good | Moderate | High | Very High | |||
Classification | Clean | Normal | Moderate | Attention | Alert | Warning | Emergency |
PM2.5 (µg/m3) | 0 - 66 | 67 - 133 | 134 - 233 | 234 - 279 | 280 - 366 | 367 - 433 | > 434 |