The AQI in Delhi is seemingly increasing by the day. On Saturday, October 11, the Air Quality Index (AQI) bordered on ‘poor’ as the reading jumped to 193. The Delhi AQI was 193 at 5 am on Saturday, as per the Air Quality Early Warning System (EWS) for Delhi.

This was far higher than 129 recorded at 5:30 am on Friday and 91 recorded at the same time on Thursday.

The AQI reading is categorised as Good (0-50), Satisfactory (51-100), Moderately Polluted (101-200), Poor (201-300), Very Poor (301-400), and Severe (401-500). Thus, higher the AQI reading, the unhealthier it gets to breathe.

These categories are arrived at after evaluating various parameters. The most prominent among these is the particulate matter (PM) 2.5 pollutant, which is very fine and easy to breathe in. This causes the mo

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