As smog continued to shroud Delhi and its air quality hovered in the ‘very poor’ category, the Supreme Court was told on Monday that several air monitoring stations in the capital were not operational, raising concerns over the accuracy of pollution data and timely implementation of anti-pollution measures.

A counsel appearing before the bench led by Chief Justice B.R. Gavai informed the court that “only nine out of 37 monitoring stations were working on Diwali.” He warned that authorities “don’t even know when to implement GRAP (Graded Response Action Plan)” because of this failure in monitoring infrastructure. Another lawyer noted that “media reports after reports” had highlighted the problem but little had changed.

Taking note of the submissions, the Chief Justice directed the Commiss

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