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Which one of the following is not included in the National Air Quality

June 1, 2025 by rawan239

Which one of the following is not included in the National Air Quality Index?

Sulphur

Nitrogen dioxide

Lead

Methane

This question was previously asked in

UPSC CDS-2 – 2017

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Methane is not included in the pollutants measured for the National Air Quality Index (NAQI) in India.

The National Air Quality Index (NAQI) in India measures the levels of eight major air pollutants: Particulate Matter (PM₁₀ and PM₂.₅), Ozone (O₃), Sulphur Dioxide (SO₂), Nitrogen Dioxide (NO₂), Carbon Monoxide (CO), Ammonia (NH₃), and Lead (Pb).

Methane (CH₄) is a significant greenhouse gas contributing to climate change, but it is not one of the standard criteria pollutants monitored for reporting ambient air quality health impacts via the NAQI. Sulphur, Nitrogen dioxide, and Lead are represented by SO₂, NO₂, and Pb respectively, which are part of the NAQI pollutants.

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