What does the weather aqi mean?

AQI, whose full name is air quality index, is an ambient air quality index, which is a common international atmospheric environmental quality evaluation system. AQI has six grades to describe the degree of air cleanliness or pollution and its impact on health.

QI is the abbreviation of ambient air quality index, and it is a new air quality evaluation standard issued by the state in March 20 12. There are six pollutants monitored: sulfur dioxide, nitrogen dioxide, PM 10, PM2.5, carbon monoxide and ozone, and the data is updated every hour. AQI gives a unified evaluation standard for these six pollutants.

The monitoring technical specifications, quality control requirements and data release requirements of PM2.5 and other indicators have not yet been issued by the state, so the monitoring data and evaluation results released by Jiangsu Province are still in trial operation. In the process of trial operation, the real response is that the instrument has zero value, negative value, abnormally high or low value or even missing data due to power failure, unstable transmission network, quality control detection, meteorological conditions or sudden change of pollutant concentration.