SmogRank / Cleaner or dirtier / India
India: cleaner or dirtier, 2025
In India, 5 cities have enough days in both years to compare 2025 with the same days of 2024: 1 got dirtier and 4 cleaner.
The one city that got dirtier
| # | City | 2024 | 2025 | Change |
|---|---|---|---|---|
| 1 | ChennaiTamil Nadu, India | 94 | 99 | +2.7 µg/m³+8% |
The 4 cities that got cleaner, biggest fall first
| # | City | 2024 | 2025 | Change |
|---|---|---|---|---|
| 1 | KolkataWest Bengal, India | 163 | 152 | −15.5 µg/m³−21% |
| 2 | DelhiIndia | 184 | 179 | −5.8 µg/m³−6% |
| 3 | MumbaiMaharashtra, India | 122 | 111 | −4.8 µg/m³−11% |
| 4 | HyderabadTelangana, India | 115 | 108 | −2.9 µg/m³−7% |
Means in US AQI over the days a city was measured in both years, the same calendar days each year; a city needs 55% of the days paired, and at least 30. The change is in µg/m³ and per cent. How we compare.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales
Updated 2026-10-07 12:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.