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About the Air Quality and Pollution Measurement
The table below defines the Air Quality index scale as defined by the US-EPA 2016 standard
0-50
Good
Air quality is considered satisfactory, and air pollution poses little or no risk
None
51-100
Moderate
Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution
Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion
101-150
Unhealthy for Sensitive Groups
Members of sensitive groups may experience health effects. The general public is not likely to be affected
Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion
151-200
Unhealthy
Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects
Active children and adults, and people with respiratory disease, such as asthma, should avoid prolonged outdoor exertion; everyone else, especially children, should limit prolonged outdoor exertion
201-300
Very Unhealthy
Health warnings of emergency conditions. The entire population is more likely to be affected
Active children and adults, and people with respiratory disease, such as asthma, should avoid all outdoor exertion; everyone else, especially children, should limit outdoor exertion
300+
Hazardous
Health alert: everyone may experience more serious health effects
Everyone should avoid all outdoor exertion
To know more about Air Quality and Pollution, check the wikipedia Air Quality topic or the airnow guide to Air Quality and Your Health
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