CPCB clarifies air quality data methodology following Diwali measurement gaps

The Central Pollution Control Board (CPCB) has released a comprehensive statement outlining the technical architecture of India's National Air Quality Index (NAQI) and the mechanisms governing data collection across monitoring stations. The move follows scrutiny of measurement practices during periods of elevated pollution, including festival seasons when air quality typically deteriorates.

In its clarification, the CPCB detailed the design methodology underpinning NAQI, which integrates readings from multiple pollutants including particulate matter, nitrogen dioxide, sulphur dioxide, and ozone. The board explained how the index aggregates data from its network of real-time monitoring stations positioned across urban and industrial areas nationwide.

The statement also addressed the international standards alignment of India's air quality monitoring framework. The CPCB outlined how NAQI parameters correspond with globally recognized measurement protocols, positioning India's system within the broader context of international environmental monitoring practices.

The clarification is expected to provide greater transparency to environmental researchers, policymakers, and the public regarding air quality assessment during high-pollution periods. The CPCB's detailed explanation of its data collection procedures aims to enhance understanding of how India's air quality measurements are conducted and reported across different seasons and events.