In 2025, several cities in India have made significant improvements in air quality, offering cleaner and healthier environments for their residents. These cities have successfully reduced pollution levels by implementing effective measures and promoting green initiatives. With the Air Quality Index (AQI) showing positive results, these cities set an example of how urban areas can prioritize environmental well-being while maintaining growth and development.
Tirunelveli, a city in Tamil Nadu, holds the top spot for the best air quality in India in 2025, with an impressive AQI of 33. The city’s low pollution levels are mainly due to the reduction in PM10 particles, a prominent pollutant. Tirunelveli’s commitment to environmental conservation, combined with its lush green surroundings, ensures that the air remains clean and fresh, offering a healthy living environment for its residents.
Tirunelveli, a city in Tamil Nadu, ranks first for the best air quality in India in 2025, with a remarkable AQI of 33, followed by Naharlagun, Madikeri and Vijayapura.
Here is the list of top-10 Indian cities with the best AQI 2025:
| Rank | Indian City | State | AQI | Prominent Pollutant |
| 1. | Tirunelveli | Tamil Nadu | 33 | PM10 |
| 2. | Naharlagun | Arunachal Pradesh | 43 | PM10 |
| 3. | Madikeri | Karnataka | 44 | PM2.5 |
| 4. | Vijayapura | Karnataka | 47 | PM10 |
| 5. | Thanjavur | Tamil Nadu | 55 | PM2.5 |
| 6. | Koppal | Karnataka | 55 | PM2.5 |
| 7. | Varanasi | Uttar Pradesh | 55 | PM2.5, PM10 |
| 8. | Hubballi | Karnataka | 56 | PM2.5, CO |
| 9. | Kannur | Kerala | 56 | PM10 |
| 10. | Chhal | Chhattisgarh | 56 | PM10 |
The Air Quality Index (AQI) is a tool used by government agencies to show how polluted the air is or might become. As pollution increases, the AQI rises, indicating higher healthier risks. People with respiratory or heart conditions, along with children and the elderly, are more affected. When AQI is high, it is advised to limit outdoor activities and use masks or air purifiers, especially during events like wildfires.
The National Air Quality Index (AQI) uses six categories to describe air quality and its health effects:
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