PM1.0 | Unusually sensitive people Consider reducing prolonged or heavy exertion. Watch for symptoms such as coughing or shortness of breath. These are signs to take it easier. Everyone else It"s a good day to be active outside. |
PM2.5 | Unusually sensitive people Consider reducing prolonged or heavy exertion. Watch for symptoms such as coughing or shortness of breath. These are signs to take it easier. Everyone else It"s a good day to be active outside. |
PM10.0 | It"s a great day to be active outside. |
Good
|
Air quality is considered satisfactory, and air pollution poses little or no risk. |
Moderate
|
Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people. For example, people who are unusually sensitive to ozone may experience respiratory symptoms. |
Unhealthy for Sensitive Groups
|
Although general public is not likely to be affected at this AQI range, people with lung disease, older adults and children are at a greater risk from exposure to ozone, whereas persons with heart and lung disease, older adults and children are at greater risk from the presence of particles in the air. |
Unhealthy
|
Everyone may begin to experience some adverse health effects, and members of the sensitive groups may experience more serious effects. |
Very Unhealthy
|
This would trigger a health alert signifying that everyone may experience more serious health effects. |
Hazardous
|
This would trigger a health warnings of emergency conditions. The entire population is more likely to be affected. |
Fine particles (PM2.5) are 2.5 micrometers in diameter or smaller, and can only be seen with an electron microscope. Fine particles are produced from all types of combustion, including motor vehicles, power plants, residential wood burning, forest fires, agricultural burning, and some industrial processes.