Air Quality Index

 

Under the Clean Air Act, the Environmental Protection Agency is required to establish a nationally uniform air quality index for reporting air quality. The index provides clear and consistent information regarding air quality and associated health risks.

 

Categories Ozone Fine Particulate PM2.5 Ozone/PM2.5 Combination

 

VERY

UNHEALTHY

(201-300)

 

Active children and adults, and people with lung disease, including asthma, should avoid all physical activities; everyone should significantly cut back on physical activities.

 

  

People with lung or heart disease, the elderly and children should avoid all physical activity; everyone should significantly cut back on physical activities.

 

  

Everyone, especially people with heart or lung disease, including asthma, should avoid physical activities.

 

 

UNHEALTHY

(151-200)

  

Everyone, especially active children and adults, and people with lung disease, including asthma, should cut back or reschedule strenuous activities; more sensitive people should avoid strenuous activities.

 

  

Everyone, especially people with lung or heart disease, the elderly and children should cut back or reschedule strenuous activities; more sensitive people should avoid strenuous activities.

 

  

Everyone, especially people with heart or lung disease, including asthma, should avoid strenuous activities.

 

 

UNHEALTHY FOR SENSITIVE GROUPS (101-150)

 

  

Active children and adults, and people with lung disease, including asthma, should cut back or reschedule strenuous activities.

 

  

People with lung or heart disease, including asthma, the elderly and children should cut back or reschedule strenuous activities.

 

  

Active adults, children, the elderly, and people with heart or lung disease, including asthma, should cut back or reschedule strenuous activities.

 

 

MODERATE

(51-100)

  

Unusually sensitive people should plan outdoor activities when the air quality is better.

 

  

Unusually sensitive people should plan outdoor activities when the air quality is better.

 

  

Unusually sensitive people should plan outdoor activities when the air quality is better.

 

 

GOOD (0-50)

 

 

Enjoy Activities

 

 

Enjoy Activities

 

 

Enjoy Activities

 

 

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