NEW DELHI: The Supreme Court has raised serious concerns regarding the operational status of air quality monitoring stations in Delhi, particularly during the Diwali festival when pollution levels typically surge. During a hearing on the MC Mehta case, the court noted that only nine out of 37 monitoring stations were functional on Diwali, which hampers the ability to implement timely pollution control measures. Chief Justice B.R. Gavai and Justice K. Vinod Chandran directed the Commission for Air Quality Management (CAQM) to submit an affidavit detailing the steps taken to improve air quality in the Delhi-NCR region.

Senior advocate Aparajita Singh, acting as amicus curiae, highlighted alarming reports indicating that many monitoring stations were non-operational during a critical time for air quality. She stated, "If the monitoring stations are not even functioning, we don't even know when to implement GRAP (Graded Response Action Plan)." The court emphasized the need for proactive measures rather than reactive ones, urging CAQM to provide comprehensive data and a clear action plan.

In response, the CAQM's counsel mentioned that the Central Pollution Control Board (CPCB) is primarily responsible for monitoring air quality data. Additional Solicitor General Aishwarya Bhati assured the court that all relevant agencies would submit the required reports soon.

As of Monday, the CPCB's Sameer app recorded an average Air Quality Index (AQI) of 304 for Delhi, categorizing it as 'very poor'. Reports indicated that 28 monitoring stations recorded AQI levels above 300, with three stations exceeding 400, which is classified as 'severe'. The city has been enveloped in thick smog, significantly reducing visibility in many areas.

Experts warn that such poor air quality can lead to serious health issues, particularly for vulnerable groups like children, the elderly, and those with pre-existing conditions. The Supreme Court plans to review the situation again after receiving reports from CAQM and CPCB to determine if stricter measures under GRAP are necessary to combat the ongoing pollution crisis.