This is based on this spreadsheet (http://www.myhealthbeijing.com/wp-content/uploads/2015/04/Dylos-AQI-Conversion-Spreadsheet.xlsx)
This is a copy of the data from https://blissair.com/what-is-pm-2-5.htm, which seems like a pretty good source.
|
PM2.5
|
Air Quality Index
|
PM2.5 Health Effects
|
Precautionary Actions
|
|---|---|---|---|
|
0 to 12.0
|
Good
0 to 50 |
Little to no risk. | None. |
|
12.1 to 35.4
|
Moderate
51 to 100 |
Unusually sensitive individuals may experience respiratory symptoms. | Unusually sensitive people should consider reducing prolonged or heavy exertion. |
|
35.5 to 55.4
|
Unhealthy for Sensitive Groups
101 to 150 |
Increasing likelihood of respiratory symptoms in sensitive individuals, aggravation of heart or lung disease and premature mortality in persons with cardiopulmonary disease and the elderly. | People with respiratory or heart disease, the elderly and children should limit prolonged exertion. |
|
55.5 to 150.4
|
Unhealthy
151 to 200 |
Increased aggravation of heart or lung disease and premature mortality in persons with cardiopulmonary disease and the elderly; increased respiratory effects in general population. | People with respiratory or heart disease, the elderly and children should avoid prolonged exertion; everyone else should limit prolonged exertion. |
|
150.5 to 250.4
|
Very Unhealthy
201 to 300 |
Significant aggravation of heart or lung disease and premature mortality in persons with cardiopulmonary disease and the elderly; significant increase in respiratory effects in general population. | People with respiratory or heart disease, the elderly and children should avoid any outdoor activity; everyone else should avoid prolonged exertion. |
|
250.5 to 500.4
|
Hazardous
301 to 500 |
Serious aggravation of heart or lung disease and premature mortality in persons with cardiopulmonary disease and the elderly; serious risk of respiratory effects in general population. | Everyone should avoid any outdoor exertion; people with respiratory or heart disease, the elderly and children should remain indoors. |