According to the Swachh Vayu Survekshan 2023 (clean air survey) conducted by the Central Pollution Control Board (CPCB) under the National Clean Air Programme (NCAP) of the Ministry of Environment, Forest and Climate Change, Chandigarh – which is considered very liveable – failed to find a place in top 10 ranks, even as Delhi stood at 9th place with a score of 177. Mumbai too had 10th rank with a score of 176.3, while Chandigarh scored 158.