MUMBAI, Jan. 23 -- As part of a crackdown to curb rising air pollution levels in the city, the BMC has issued stop-work notices to 106 construction sites across Mumbai for failing to install mandatory air-quality-monitoring systems. The action follows repeated directives from the civic body, making it mandatory to install these for all ongoing construction projects within BMC limits, with large projects of over Rs.1,000 crore additionally required to install reference-grade air-quality monitors. Despite sustained follow-ups since May 2025, several project authorities failed to comply, prompting the civic body to order an immediate halt to work at non-compliant sites. The notices have been served on both government and private projects, the former including railway bridge construction works, and Slum Rehabilitation Authority (SRA) and Maharashtra Housing and Area Development Authority (MHADA) undertakings. According to civic officials, inspections are ongoing, and further action will be taken against other construction sites found violating the norms. The enforcement drive is being carried out under the guidance of municipal commissioner and administrator Bhushan Gagrani and additional municipal commissioner (eastern suburbs) Dr Avinash Dhakane. An official from the environment and climate change department said, "The construction sites where air quality sensors are not yet functional are being directed to submit immediate compliance reports, failing which stop-work orders are being issued without delay." The civic administration has also intensified ground-level monitoring through physical inspections, logbook verification and surprise checks in line with a pre-decided action plan. The next court hearing related to air pollution matters is scheduled for January 23, and officials have been instructed to ensure strict enforcement ahead of the proceedings. The action is not limited to the construction sector alone. The public health department has also been directed to initiate similar measures against bakery units found violating emission norms related to smoke, fuel usage and air pollution standards. Reiterating its firm stance, the BMC has emphasised that there will be no compromise in the task of improving Mumbai's air quality....