Air Quality in Qingdao – China

AQI Air Quality Health Implications
0 – 50 Good Air quality is considered satisfactory, and air pollution poses little or no risk
51 -100 Moderate Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.
101-150 Unhealthy for Sensitive Groups Members of sensitive groups may experience health effects. The general public is not likely to be affected.
151-200 Unhealthy Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects
201-300 Very Unhealthy Health warnings of emergency conditions. The entire population is more likely to be affected.
300+ Hazardous Health alert: everyone may experience more serious health effects

The pollution indices and color codes available above follow the EPA graduation, as defined by AirNow and explained in wikipedia.