From: Building an indoor air quality monitoring system based on the architecture of the Internet of Things
AQI index | Status color | Effects on human health | Suggestions for activities |
---|---|---|---|
Air Quality Index (AQI) | |||
Good (0–50) | Green | Good air quality and low pollution level | Normal outdoor exercise |
Normal (51–100) | Yellow | Having little effect on a few sensitive groups | Normal outdoor exercise |
Unhealthy for sensitive groups (101–150) | Orange | Having effects on sensitive groups, and insignificant effects on the general public | The general public shall reduce long-time and vigorous outdoor exercise |
Unhealthy for all groups (151–200) | Red | Having serious effects on sensitive groups, and effects on the general public | The general public shall reduce outdoor activities if they feel ill Students shall avoid long-time and vigorous exercise |
Very unhealthy (201–300) | Purple | Having serious effects on the health of all groups | The general public shall reduce outdoor exercise |
Harmful (301–400) | Maroon | Immediate threat to health and serious effects on everyone | The general public shall wear protective equipment, such as masks, if they go out |
Harmful (401–500) |  |  |  |