Addtime:2018-04-14 09:27:25 Source:Zhejiang Lvtao Environmental Protection Equipment Co., Ltd. Hits:
Air pollution Index (Air pollution Index, API for short) is the regular monitoring of several kinds of Air pollutant concentrations are simplified into a single conceptual Index value form, and characterization of Air pollution and Air quality condition, suitable for said the short-term Air quality status and changing trend of the city. Air pollution pollutants are: ash, total suspended particulate matter and inhalable particulates (dust), nitrogen dioxide, sulfur dioxide, carbon monoxide and ozone, volatile organic compounds and so on.
Introduction: air pollution index is based on air environment quality standards and ecological environment effect of various pollutants and its influence on human health to determine pollution index classification value and the corresponding pollutant concentration limit. The air quality weekly standard for the air pollution index is; (1) the air pollution index (API) of 50 points corresponding to the pollutant concentration of the national air quality daily standard; (2) the pollutant concentration corresponding to API100 points is the second-level standard of national air quality daily average; (3) the pollutant concentration corresponding to API200 is the three-level standard of the national air quality daily average; (4) the classification of the higher value segment of the API corresponds to the concentration limit of various pollutants for different effects on human health.
Classification criteria for air pollution index.
Air pollution index (AirpollutionIndex, API for short) is to assess the air quality of the air pollution index number, it can tell you today or tomorrow the air you breathe is clean and polluted, and you should pay attention to health problems. The air pollution index focuses on the possible effects on human health within hours or days after inhaling contaminated air. Air pollution index is classified into 0 to 50, 51-100, 101-150, 151-200, 200-151, 251-300 and more than 300 seven, seven levels corresponding to the air quality, the larger the index, the higher the level, the pollution is more serious, the more obvious impact on human health.
The air pollution index is 0-50, the air quality level is I, and the air quality is excellent. There is no air pollution problem, no harm to the public health.
The air pollution index is 51-100, the air quality level is II, and the air quality is good. At this time, air quality is considered acceptable, and there is no harm to public health except for very few people who are particularly sensitive to certain pollutants.
The air pollution index is 101-150, the air quality level is III (1), and the air quality is slightly polluted. At this point, the crowd of pollutants is more sensitive, such as children and the elderly, patients with respiratory disease or heart disease, and people who love outdoor activities, their health will be affected, but has no effect on healthy people basic. The air pollution index is 151-200, and the air quality level is III (2). The air quality is slightly polluted. At this time, almost everyone's health will be affected, and the adverse effect on sensitive people is particularly obvious.
The air pollution index is 201-300, the air quality level is IV (1) and IV (2), and the air quality is moderate and moderate heavy pollution. At this point, everyone's health will be severely affected.
The air pollution index is greater than 300, the air quality level is V, and the air quality is seriously polluted. At this point, everyone's health will be severely affected.
Air pollution index can be predicted before the serious air pollution problem, remind the general public, especially those that are sensitive to air pollution, such as heart disease or respiratory problems, if necessary, take preventive measures.