Delhi-NCR PM2.5 levels hit 236 micrograms, 97 per cent higher than 2025 levels
GS3Economy · S&T · Environment · Security· Pollution (air, water, plastic)· Prelims·
Source apportionment and air quality monitoring: a key GS3 Environment and Ecology topic.
Why in news
The Centre for Science and Environment reported a significant surge in Delhi-NCR PM2.5 levels during the week leading up to Diwali 2026, identifying transport as the primary contributor.
Background
Average PM2.5 levels in Delhi-NCR reached 236 micrograms per cubic meter in the week before Diwali 2026. This figure represents a 97 per cent increase compared to the 120 micrograms per cubic meter recorded in 2025.
Facts for Prelims
- FactPM2.5 levels in Delhi-NCR reached 236 micrograms per cubic meter in the week leading up to Diwali 2026
- FactPM2.5 levels in 2025 were recorded at 120 micrograms per cubic meter
- BodyCentre for Science and Environment (CSE) is the organization that reported the pollution surge
- FactTransport was identified as the primary contributor to the surge in air pollution
Prelims practice question
Which organization reported the surge in PM2.5 levels in the Delhi-NCR region?
- (a)Central Pollution Control Board
- (b)Centre for Science and Environment
- (c)Indian Institute of Pollution Control
- (d)National Institute of Ecology
Show answer
Answer: (b) Centre for Science and Environment — The Centre for Science and Environment (CSE) is the organization that reported the pollution surge.
For Mains
Q. Discuss the structural challenges in curbing vehicular emissions in the Delhi-NCR region despite existing environmental regulations.
Dimensions to cover in your answer
- Regulatory friction: Coordination gaps between Delhi and neighboring states in enforcing emission norms
- Infrastructure deficit: Insufficient public transport capacity leading to high private vehicle dependency
- Monitoring gaps: Need for real-time source apportionment to differentiate industrial vs transport emissions
Keywords: Air Quality Index · Source Apportionment · Vehicular Emissions · Ambient Air Quality · Environmental Governance
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This note is generated automatically from SatyaDheesh's news feed and mapped to the UPSC CSE syllabus. Check facts against the original report or PIB before using them in an answer.