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VOL. I · EST. 11.2025 
SatyaDheesh
सत्याधीश
India's Ground Truth Record
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Delhi air quality hits 'severe' category with AQI of 483 after Diwali celebrations

GS3Economy · S&T · Environment · Security· Pollution (air, water, plastic)· Prelims·

Environmental governance and emergency measures: a GS3 case study on air pollution management.

Why in news

Delhi's air quality reached the 'severe' category with an AQI of 483 reported by the Central Pollution Control Board (CPCB) following Diwali celebrations.

Background

The city is currently under Stage III of the Graded Response Action Plan (GRAP).

Facts for Prelims

  • BodyCentral Pollution Control Board (CPCB) is the official body reporting AQI in India
  • SchemeGraded Response Action Plan (GRAP) is the emergency measure for air pollution in NCR
  • FactCPCB AQI scale is designed from 0 to 500, where values above 500 are reported as 500+
  • PlaceShahdara and Defence Colony recorded AQI levels above 1,000 according to IQAir

Prelims practice question

Which body is the official authority responsible for reporting the Air Quality Index (AQI) in India?

  1. (a)Central Pollution Control Board
  2. (b)State Pollution Control Board
  3. (c)Ministry of Environment, Forest and Climate Change
  4. (d)National Green Tribunal
Show answer

Answer: (a) Central Pollution Control Board — The Central Pollution Control Board (CPCB) is the official body reporting AQI in India.

For Mains

Q. Critically analyze the limitations of the current AQI framework in communicating public health risks during extreme pollution events in the National Capital Region.

Dimensions to cover in your answer

  • Methodological discrepancy: Variance between CPCB's 0-500 scale and private proprietary health-risk indices
  • Communication gap: AQI's role as a public health tool vs. its limitation in reflecting actual PM2.5 concentration spikes
  • Regulatory friction: Effectiveness of Stage III GRAP restrictions against localized high-intensity pollution sources

Keywords: Air Quality Index · Graded Response Action Plan · PM2.5 concentration · Public health communication · Environmental governance

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