| Locations | Annual average tropospheric O3 (ppbv) | % of change | |
| 2005 | 2018 | ||
| Nagarcoil | 42.11 | 43.96 | 4.40 |
| Pondicherry | 43.86 | 44.86 | 2.28 |
| Kasargod | 43.68 | 45.53 | 4.23 |
| Panaji | 48.37 | 50.21 | 3.80 |
| Bellari | 48.52 | 51.76 | 6.67 |
| Vishakapattanam | 47.36 | 51.08 | 7.85 |
| Ramagundam | 50.60 | 54.37 | 7.45 |
| Ahmednagar | 54.06 | 56.73 | 2.67 |
| Raipur | 51.67 | 56.82 | 9.96 |
| Rajkot | 54.06 | 56.06 | 3.70 |
| Kharagpur | 50.26 | 55.76 | 5.50 |
| Bhopal | 53.70 | 57.78 | 6.27 |
| Patna | 54.13 | 57.50 | 6.22 |
| Aizawl | 50.43 | 55.46 | 9.97 |
| Dibrugarh | 50.98 | 54.42 | 6.75 |
| Gangtok | 59.86 | 70.20 | 17.27 |
| Lucknow | 54.56 | 58.38 | 7.01 |
| Jaipur | 55.25 | 59.31 | 7.35 |
| Chandigarh | 58.01 | 59.26 | 2.16 |
| Anantnag | 64.72 | 70.37 | 8.73 |