Arun Krishnamurthy (born 1986) is an Indian environmental activist who has initiated campaign cleaning various lakes across India. He is known for founding the NGO, Environmentalist Foundation of India (EFI) in 2011 based in Chennai which has its branches in other cities such as Hyderabad, Delhi and Coimbatore. Arun with the organisation has been successful in cleaning over 17 lakes in the country and having worked in Google before quitting the job to dedicate voluntarily.