Noise pollution

Story hook

At 6:30 AM on 5 November 2024, the CPCB's noise monitoring station at ITO crossing in central Delhi registered 103.6 dB(A) — louder than a chainsaw at 1 metre. It was the morning after Diwali. The Supreme Court's 2005 ruling (Noise Pollution v. UoI) had set a hard limit of 55 dB(A) in residential areas during daytime + 45 dB(A) at night. Delhi-NCR was exceeding the night-time limit by 40 dB(A) — not double the noise but 10,000 times the sound pressure (decibels are logarithmic).

The same week, in Kalpakkam, Tamil Nadu, India's first 500 MWe Prototype Fast Breeder Reactor (PFBR) was approaching first criticality after a delay of 20 years from its 2004 design. Built by BHAVINI (Bharatiya Nabhikiya Vidyut Nigam Ltd.), it was India's bet on closed nuclear fuel cycle technology — sodium-cooled, plutonium-fueled, breeding more fuel than it consumes. Just 140 km north, at the Mayapuri scrap market in Delhi, the 2010 Cobalt-60 incident — where a hospital's discarded gamma-ray unit was dismantled in a scrap yard — was still a fresh memory.

Noise and radioactive contamination are very different forms of pollution — one acoustic, one nuclear — but UPSC syllabus groups them under "other pollution" because both:

• Cannot be seen, only measured by instruments.
• Have cumulative + long-term health effects (hearing loss, cardiovascular impact, cancer).
• Are regulated under EPA 1986 + specific rules.
• Have growing significance as urban + nuclear expansion accelerates.

This file tackles both — the everyday menace of noise + the rare-event

• high-stakes risk of radioactive contamination.

Why this matters for UPSC

Noise pollution + radioactive contamination appear in Prelims (2014, 2018, 2021, 2022) and occasionally Mains (2018 on noise; 2023 on nuclear policy). Tests: Noise Pollution Rules 2000, ambient noise standards by zone, AERB + DAE + BARC + BHAVINI structure, Atomic Energy Act 1962, Atomic Energy Regulatory Board, nuclear events (Three Mile Island, Chernobyl, Fukushima), nuclear waste classification

• HLW/ILW/LLW.