Air quality is good and poses little to no health risk. Everyone can enjoy outdoor activities without restrictions.
Moderate(51–100)
Air quality is generally acceptable, though unusually sensitive individuals may notice mild effects. Sensitive people may consider reducing intense outdoor activity.
Unhealthy for Sensitive Groups(101–150)
Sensitive groups such as children, older adults, pregnant people, and those with heart or lung disease may experience health effects. These individuals should limit prolonged outdoor exertion.
Unhealthy(151–200)
Air pollution levels are unhealthy for everyone. All individuals should reduce outdoor activity and remain indoors if symptoms occur.
Very Unhealthy(201–300)
Health risks are increased for the entire population. Everyone should avoid outdoor activity and stay indoors in clean air spaces.
Hazardous(301+)
Air pollution levels are extremely high and can cause serious health effects for anyone. Stay indoors and follow public health guidance.