In a stern rebuke to state authorities, the Bombay High Court (HC) has rejected the Maharashtra government’s explanation that recent air-quality deterioration in Mumbai was caused by ash drift from a volcanic eruption in Ethiopia. The court emphasized that structural, enforceable measures must be implemented immediately to curb pollution, particularly the dust and particulate emissions arising from widespread construction activity across the city.
Court Rejects Natural Phenomenon Argument
During a hearing on a batch of petitions concerning deteriorating air quality, the bench comprising Chief Justice Shree Chandrashekhar and Justice Gautam Ankhad dismissed the government’s claim. The judges pointed out that poor visibility and rising pollution levels were already evident before the supposed arrival of volcanic ash, with certain areas of the city recording visibility under 500 metres.
The court criticized previous pollution-control efforts as ineffective, stating that they had failed to yield “any visible improvement” in air quality. The bench demanded that authorities present a concrete action plan to tackle the city’s pollution crisis effectively.
Court’s Directives
- A five-member committee consisting of officials from the Brihanmumbai Municipal Corporation (BMC), the Maharashtra Pollution Control Board (MPCB), and the state health department has been formed to inspect construction sites and report on compliance with pollution norms by 15 December 2025.
- Authorities are required to implement “concrete steps” — not just guidelines — to control dust, debris, and emissions from construction, industrial activity, and open burning.
- In localities where the Air Quality Index (AQI) remains hazardous for prolonged periods, stricter curbs, including suspension of construction work, must be enforced under existing pollution-control frameworks.
Immediate Response from Authorities
Following the court’s orders, the BMC issued “stop-work” notices to 53 active construction sites across multiple wards in Mumbai. Surprise inspections revealed widespread non-compliance with mandatory pollution-control measures, including non-functional AQI sensors at construction zones.
City officials reported that 662 air-quality sensors have been installed at construction sites, with another 251 in progress. However, 117 of these sensors integrated with the central monitoring dashboard were found inactive. The municipal commissioner warned of “stringent action” by 95 ward-level enforcement squads if non-compliance continues.
Apart from construction sites, other pollution sources, such as bakeries and crematoria, are being targeted. Authorities are encouraging a transition to cleaner fuels and stricter emission controls to improve overall air quality in the city.
Broader Implications
The court’s intervention highlights the critical importance of clean air as a public health and constitutional concern. By rejecting the “volcanic ash” defense, the Bombay High Court has underscored that chronic urban air pollution in Mumbai is a man-made problem that requires immediate, effective action rather than excuses.
Experts note that the court’s orders could set a legal precedent, compelling municipal authorities to implement sustained, enforceable pollution-control measures. With air quality continuing to deteriorate, swift compliance with the HC directives is crucial to safeguarding public health in India’s financial capital.
