NEW DELHI: The city was noisier this Diwali than in the past two years as more areas recorded noise levels higher than set standards. The Delhi Pollution Control Committee (DPCC) has categorised all areas of the city into four zones for noise levels — silent, residential, commercial, and industrial zones. The standards vary for the daytime and nighttime. For silent zones, the maximum decidbel level allowed is 40 dBA in the night and 50 in the day. In residential areas, it's 45 at nighttime and 55 in the daytime. For commercial areas, the maximum level allowed is 55 units at night and 65 during the day. In industrial areas, 70 units maximum is for nighttime and 75 in the daytime. After five years, the firecracker ban was conditionally lifted by the Supreme Court. Only green crackers

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