In compliance to the direction of Hon’ble National Green Tribunal, Principal Bench, New Delhi Dated: November 17, 2017 (in the matter of Vardhman Kaushik Vs. Union of India & Others vide OA No. 44/2018 (Earlier OA No. 21/2014), the ambient air quality data of Continuous Ambient Air Quality Monitoring Stations (CAAQMS) and Manual Stations under NAMP in Delhi (operated by CPCB) for the period May 01, 2018 to May 31, 2018 are compiled and presented in this report.