Why Doesn't India Report Air Quality (AQI) Measure Beyond 500?

In Delhi, people are protesting about the city's severe air pollution. A key point of anger is that India's air quality index (AQI) stops reporting numbers beyond 500, simply labelling it 'Severe Plus'.

Protesters and experts argue that this creates a problem. When the AQI is 'beyond index', it masks the true scale of the crisis. For example, during the recent smog, some monitoring stations recorded levels far beyond 500, but the official index did not reflect this. This leads to calls for a more accurate measurement system to show the real severity of the pollution.

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