On Diwali night, Delhi's PM2.5 readings climbed towards 1,000, then went blank
HT's analysis of CPCB's records shows fine-dust readings at many stations stopped just short of 1,000 µg/m³ while their gas monitors kept reporting.

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On Diwali night, Delhi's PM2.5 readings climbed towards 1,000, then went blank (opens Hindustan Times in a new tab)
HT's analysis of CPCB's records shows fine-dust readings at many stations stopped just short of 1,000 µg/m³ while their gas monitors kept reporting.