What is the haze index?

What is the smog index of 1? The smog index is actually the usual air quality index, which is a dimensionless index and describes the bleak control of low energy. For a single pollutant, there is an air quality sub-index, and the pollutants involved in air quality assessment include six items: fine particles, inhalable particles, sulfur dioxide, nitrogen dioxide, ozone and carbon monoxide. Haze index mainly refers to the comprehensive evaluation of sulfur dioxide, inhalable particulate matter and single nitrogen oxide.

2 What is the haze index? The evaluation of normal haze index is divided into 6 grades.

Grade I: the air pollution index is 0-50, and the air quality is excellent.

Grade II: the air pollution index is 5 1- 100, and the air quality is good.

Grade III: the air pollution index is 10 1- 150, and the air quality is slightly polluted.

Level 4: air pollution index 15 1-200, with moderate air pollution.

Grade 5: air pollution index is 20 1-300, and the air quality is heavily polluted.

Level 6: the air pollution index is greater than 300, and the air quality is seriously polluted.

Level 1: The air quality is satisfactory, there is basically no air pollution, and all kinds of people can move normally.

Grade II: The air quality is acceptable, but some pollutants may have a slight impact on the health of a very small number of extremely sensitive people. It is suggested that a very small number of extremely sensitive people reduce outdoor activities.

Grade III: The symptoms of susceptible people are slightly aggravated, and healthy people have irritating symptoms. It is suggested that children, the elderly and patients with heart disease and respiratory diseases should reduce long-term and high-intensity outdoor sports.

Level 4: further aggravate the symptoms of susceptible people, which may have an impact on the heart and respiratory system of healthy people. It is suggested that patients with diseases should avoid long-term high-intensity outdoor exercise, and the general population should moderately reduce outdoor exercise.

Grade 5: The symptoms of patients with heart disease and lung disease are obviously aggravated, and the exercise tolerance is reduced, which is a common symptom of healthy people. It is suggested that children, the elderly and patients with heart disease and lung disease stay indoors and stop outdoor sports, and the general population should reduce outdoor sports.

Grade 6: the exercise tolerance of healthy people is reduced, the symptoms are obviously strong, and some diseases appear in advance. It is suggested that children, the elderly and patients should stay indoors as much as possible to avoid physical exertion, and the general population should try to avoid outdoor activities.

4 Protective measures for the elderly with smog: In foggy days, the elderly must stay at home and exercise indoors to avoid going out to exercise. Cooking at home is mainly cooking, reducing the generation of oil fume such as frying.

Children: Children's physical development is not complete, and smog is more harmful. In foggy days, children should avoid going out, learn more about smog and strengthen their awareness of self-protection.

Pregnant women: pregnant women must not go out in foggy days, so they should rest at home and pay attention to supplementing the relative humidity at home.

Outdoor activists: People who work outdoors need to pay attention to wearing masks when going out, and wear gas masks when necessary, especially traffic police, sanitation workers and construction workers.