The Maharashtra Pollution Control Board (MPCB) deployed eight mobile air quality monitoring vans along the Mumbai Marathon route after Awaaz Foundation flagged unsafe PM2.5 levels ahead of the event on Friday. However, the MPCB has yet to release air quality data recorded during the marathon. 

In a press statement on Saturday, MPCB noted that sensor-based monitors, like those used by Awaaz Foundation, provide only indicative data and do not meet Central Pollution Control Board (CPCB) standards. It further stated that data collected by Awaaz Foundation on January 17 might not accurately represent conditions during the marathon on January 19. Regulatory-grade monitoring, accounting for real-time and event-specific factors, was assured by the Board.