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What is the air quality index (AQI)?
Date：2021-04-20 Hits：5488
What is the air quality index (AQI)?
1 what is the AQI?
AQI, air quality index (Air Quality Index), is a dimensionless index to quantitatively describe the situation of air quality.
2.AQI is how to calculate and evaluate?
The process of AQI calculation and evaluation can be divided into three steps:
The first step is to limit the pollutants concentration control classification (AQI concentration limit value (GB3095-2012), API concentration limits of reference (GB3095-1996)), to fine particulate matter (PM2.5), inhalable particulate matter (PM10), sulfur dioxide (SO2), nitrogen dioxide (NO2), ozone (O3), carbon monoxide (CO) and other pollutants measured concentration value (including PM2.5, PM10 for 24 hour average concentration) that air quality index were calculated (Individual Air Quality Index, referred to as IAQI);
The second step is the pollutants from IAQI choose the maximum value is determined as AQI, when AQI is larger than 50 the maximum pollutant IAQI identified as the primary pollutant;
The third step is to control the AQI grading standard, determine the air quality level, category and representation of the color, health effects and preventive measures.
In short, AQI is the pollutants in the air quality index (IAQI) maximum, when more than 50 AQI of pollutants is the primary pollutant.
3 how to understand the AQI?
AQI numerical value is greater, the level and higher categories, characterization of the deeper the color, the air pollution is more serious, the harm to human health body is greater. Members of the public to see the AQI, do not need to remember specific numerical and level of AQI, only need to pay attention to and (green), Liang (yellow), slight pollution, moderate pollution (Orange) (red), severe pollution (purple), serious pollution (maroon) six types of evaluation and characterization of color. When the categories are excellent or good, color for the green or yellow, the general population can be normal activities; when the categories for mild pollution, color is orange, red, purple or red brown, all kinds of people need to pay attention to preventive measures, as a reference in the living arrangements and travel when you. Air quality index (AQI) grade related information (Table 1) index of environmental air quality from "HJ633-2012 (AQI) technical requirements"
What is the difference between 4.AQI and the original release of API?
AQI with the original release of air pollution index (API) has the very big difference. The reference standard AQI grade calculation is the ambient air quality standard (GB3095-2012), the new pollutants participation in the evaluation of SO2, NO2, PM10, PM2.5, O3, CO six; API classification calculation of reference standard is the ambient air quality standard (GB3095-1996), the old evaluation of pollutant is SO2, NO2 and PM10 three, and AQI grading limit of stricter standards. So the pollutant index AQI is API monitoring for more, and the evaluation results more objective.
From：Guangzhou Lingjie Air Purification Equipment Manufacturing Co.,Ltd. http://www.linjec.com
1 what is the AQI?
AQI, air quality index (Air Quality Index), is a dimensionless index to quantitatively describe the situation of air quality.
2.AQI is how to calculate and evaluate?
The process of AQI calculation and evaluation can be divided into three steps:
The first step is to limit the pollutants concentration control classification (AQI concentration limit value (GB3095-2012), API concentration limits of reference (GB3095-1996)), to fine particulate matter (PM2.5), inhalable particulate matter (PM10), sulfur dioxide (SO2), nitrogen dioxide (NO2), ozone (O3), carbon monoxide (CO) and other pollutants measured concentration value (including PM2.5, PM10 for 24 hour average concentration) that air quality index were calculated (Individual Air Quality Index, referred to as IAQI);
The second step is the pollutants from IAQI choose the maximum value is determined as AQI, when AQI is larger than 50 the maximum pollutant IAQI identified as the primary pollutant;
The third step is to control the AQI grading standard, determine the air quality level, category and representation of the color, health effects and preventive measures.
In short, AQI is the pollutants in the air quality index (IAQI) maximum, when more than 50 AQI of pollutants is the primary pollutant.
3 how to understand the AQI?
AQI numerical value is greater, the level and higher categories, characterization of the deeper the color, the air pollution is more serious, the harm to human health body is greater. Members of the public to see the AQI, do not need to remember specific numerical and level of AQI, only need to pay attention to and (green), Liang (yellow), slight pollution, moderate pollution (Orange) (red), severe pollution (purple), serious pollution (maroon) six types of evaluation and characterization of color. When the categories are excellent or good, color for the green or yellow, the general population can be normal activities; when the categories for mild pollution, color is orange, red, purple or red brown, all kinds of people need to pay attention to preventive measures, as a reference in the living arrangements and travel when you. Air quality index (AQI) grade related information (Table 1) index of environmental air quality from "HJ633-2012 (AQI) technical requirements"
What is the difference between 4.AQI and the original release of API?
AQI with the original release of air pollution index (API) has the very big difference. The reference standard AQI grade calculation is the ambient air quality standard (GB3095-2012), the new pollutants participation in the evaluation of SO2, NO2, PM10, PM2.5, O3, CO six; API classification calculation of reference standard is the ambient air quality standard (GB3095-1996), the old evaluation of pollutant is SO2, NO2 and PM10 three, and AQI grading limit of stricter standards. So the pollutant index AQI is API monitoring for more, and the evaluation results more objective.
From：Guangzhou Lingjie Air Purification Equipment Manufacturing Co.,Ltd. http://www.linjec.com
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