Gyane HaobijamAir pollution trends in Mumbai during the first two months of 2026 show a noticeable change compared with the same period in 2025. A review of daily AQI levels indicates that pollution levels have remained consistently higher in 2026, with more days falling into the Unhealthy category and fewer periods of improvement.
This comparison highlights how air quality patterns are evolving and what these changes may mean for public health and urban air management.
Overview of Mumbai AQI Trends
During January and February 2025, Mumbai’s AQI generally remained within the 130–155 range, with most days categorized as Poor. A few days briefly crossed into Unhealthy, but mid-February showed gradual improvement, and AQI values dropped closer to the Moderate range.
In contrast, January and early February 2026 recorded AQI levels frequently between 170 and 200, placing many days firmly in the Unhealthy category. There were very few days where AQI dropped below 150, indicating a higher pollution baseline rather than short-term spikes.
Overall, the average pollution level in early 2026 shifted upward by approximately one AQI category compared to 2025.
Mumbai AQI Comparison in January 2025-2026
January 2025
In January 2025, AQI levels were relatively stable. Most readings fell in the Poor category, typically between 140 and 155, with only occasional spikes. Pollution episodes were short-lived, and air quality did not remain in the unhealthy range for extended periods.
January 2026
January 2026 showed a clear increase in pollution intensity and duration. AQI values frequently reached 170–190, and several days approached or exceeded 200. Unlike 2025, pollution levels remained elevated for longer stretches, suggesting persistent atmospheric conditions that limited pollutant dispersion.
Key observation:
January 2026 experienced both higher peaks and a higher baseline AQI than January 2025.
Mumbai AQI Comparison in February 2025-2026
February 2025
February 2025 showed a gradual improvement in air quality. AQI values dropped to around 118–130 during several days, indicating a shift toward the Moderate range. This pattern suggested better dispersion conditions and reduced pollutant accumulation.
February 2026 (Early Data)
In February 2026, AQI levels remained largely between 170 and 197, consistently within the Unhealthy category. Unlike the previous year, there has been no clear downward trend so far.
Key observation:
While February 2025 showed recovery, February 2026 has maintained elevated pollution levels.
AQI Category Distribution Shift
A comparison of AQI categories reveals a clear change:
Jan–Feb 2025
- Moderate: No moderate days
- Poor: Majority of days
- Unhealthy: Limited
Jan–Feb 2026
- Moderate: No moderate days
- Poor: Only few days
- Unhealthy: Majority of days
This shift indicates that average exposure levels for residents were significantly higher in early 2026.
Factors That May Influence Mumbai Higher AQI
Air quality variations between years are influenced by several factors:
- Meteorological Conditions
Lower wind speeds, temperature inversions, and atmospheric stability can trap pollutants near the surface. - Urban Emissions
Traffic density, construction activity, and industrial emissions continue to contribute to particulate pollution in metropolitan regions. - Regional Pollution Transport
Air masses can carry pollutants from surrounding industrial and urban zones, affecting coastal cities like Mumbai. - Seasonal Weather Patterns
Humidity and winter atmospheric conditions often reduce dispersion efficiency, prolonging pollution episodes.
Key Takeaways of Mumbai AQI Comparison of 2025 Vs 2026
- Mumbai’s air quality in Jan–Feb 2026 was noticeably worse than in Jan–Feb 2025.
- The average AQI category shifted upward from predominantly Poor to largely Unhealthy.
- February 2025 showed improvement, whereas February 2026 has remained elevated so far.
- Longer pollution episodes increase health risks and reduce outdoor air safety.
Conclusion
The comparison between early 2025 and 2026 highlights a concerning trend: pollution levels in Mumbai are not only rising but also persisting for longer durations. Monitoring these changes is essential for policymakers, health professionals, and residents alike.
Strengthening emission controls, improving urban planning, and expanding real-time air quality monitoring will be critical steps in managing future pollution levels and protecting public health.