Please note that the Air Pollutant Index reported by the DoE is calculated based on the 24 hours running average of the most dominant pollutants (including PM2.5, PM10 and Ozone). This can make it really difficult to find out what the actual air quality is in real time. The best practice is to report real-time air quality using hourly data, which is what most EPA worldwide do.
For instance, during a period of Haze, where the Air Quality Index can deteriorate significantly and fast, the published Air Pollution index is most likely lower than the actual pollution. Similarly, when the air polution decreases, the Air Quality Index can still be very high although the pollution is gone.Read more here.
In case you can not access the Firefox store, you can also download the ".xpi" add-on
from this link.
In order to install the Petaling Jaya, Selangor Air Quality Widget on your favorite iPhone or iPod device,
just launch the internet browser from your device and open the web page:
Then click on this icon to install the widget as an application
directly accessible from your iPhone homescreen.
Or just scan this QR-code:
You can download the Petaling Jaya, Selangor Air Quality Widget for your favorite Windows Mobile 8 or 8.1,
directly from the Microsoft application store: