Definition of air pollution indicators
Air quality index based on monitoring data will be published on the same day along with ozone (O3), suspended fine particles (PM2.5), suspended particles (PM10), carbon monoxide (CO), sulfur dioxide (SO2) and II Nitric oxide (NO2). Their concentration values, and impact on human health are converted by pollutants. The vice-value targets, indicators, deputy to the day of the maximum value of the stations on the day of the air quality index (AQI).
The concentration of pollutants and air quality index value deputy table
1. Areas are generally required to report the AQI based on 8-hour ozone values. However, there are a small number of areas where an AQI based on 1-hour ozone values would be more precautionary. In these cases, in addition to calculating the 8-hour ozone index value, the 1-hour ozone value may be calculated, and the maximum of the two values reported.
2. 8-hour O3 values do not define higher AQI values (≥ 301). AQI values of 301 or higher are calculated with 1-hour O3 concentrations.
3. 1-hour SO2 values do not define higher AQI values (≥ 200). AQI values of 200 or greater are calculated with 24-hour SO2 concentrations.
AQI value and impact on health
Air Quality Index and Activity Guidelines
Air Quality Index _AQI_.pdf
- Environmental Protection Administration, R.O.C.(Taiwan)