What are the hazards of different air indexes to human body?

Influence of air pollution index at all levels on human health

Air pollution index (API) is calculated by comparing the average weekly concentration of pollutants with the graded concentration limit of API.

The air pollution index is less than 50, indicating that the air volume is good, and the pollutant concentration is less than the first-class standard limit in the Ambient Air Quality Standard, which is first-class, which meets the air quality requirements of some areas that need special protection, such as nature reserves and scenic spots.

The air pollution index is more than 50 and less than 100, which means that the concentration of general pollutants in air quality is less than the second-class standard limit in the Ambient Air Quality Standard, which is good at the second level and meets the air quality requirements of urban residential areas, commercial traffic mixed areas, cultural areas, general industrial areas and rural areas;

The air pollution index is greater than 100 and less than 200, in which10/to 150 is the third-level light pollution, and 15 1 to 200 is the third-level light pollution, indicating that the pollutant concentration is less than the third-level standard limit of ambient air quality, which is specific. During this index period, the symptoms of susceptible people are slightly aggravated, and healthy people have irritating symptoms. Patients with heart disease and respiratory diseases should reduce physical exertion and outdoor activities;

The air pollution index is 200 to 300, indicating that the air quality exceeds the limit of the third-grade standard of ambient air quality, indicating that the air quality is poor. The symptoms of patients with heart disease and lung disease are obviously aggravated, and their exercise tolerance is reduced. The symptoms are common in healthy people. The elderly and patients with heart disease and lung disease should stay indoors to reduce physical activity.

If the air pollution index is greater than 300, it is serious pollution. The exercise tolerance of healthy people is reduced, and the symptoms are obviously strong. Some diseases will appear in advance. The elderly and patients should stay indoors to avoid physical exertion, and the general population should avoid outdoor activities.

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