What is the permissible limit of noise pollution, prescribed by CPCB during night time?

Environment & Ecology ·Previously asked in JKPSC Combined Competitive Examination (JKCCE) 2025

View the full solved paper: GS Paper I (Set B)

Question

What is the permissible limit of noise pollution, prescribed by CPCB during night time?

  1. A. Less than 40 dB (Correct answer)
  2. B. 40-70 dB
  3. C. 70-100 dB
  4. D. More than 100 dB

Correct Answer

Option A — Less than 40 dB

Detailed Solution & Explanation

The correct answer is Less than 40 dB.

Key Points

  • CPCB prescribes ambient noise limits by area type.
  • Silence zones (around hospitals, courts, educational institutions) have the strictest night-time limit of 40 dB, which falls in the "less than 40 dB" bracket relative to commercial (55 dB) and residential (45 dB) night limits.