List of industries to whom Central Ground Water Board (CGWB) NOC is required Water Quality 1. List A 1) : List of the units to whom Central Ground Water Authority (CGWA), Delhi granted NOC for ground water use. List A 2): LIST OF INDUSTRIES / INFRASTRUCTURE PROJECTS / MINING PROJECTS HAVING VALID NOC OF CGWA, NEW DELHI AS ON 31.7.2016. 2. List B : List of industries requiring NOC from CGWA and are in process.