Former Director, All India Institute of Hygiene Public Health, Calcutta, India (1993-2001), and President, Institution of Public Health Engineers, India (1994-2008). Presently he is the Chairman; Arsenic Task Force, Govt. of West Bengal. He is also the Chairman (S&T), Sulabh International Social Service Organization and Vice Chancellor, Sulabh International Academy of Environmental Sanitation.
Professor Nath is an authority in Environmental sanitation, Hygiene & Community Water Supply and deeply committed to the promotion of community hygiene and public health. He was educated at the University of Calcutta where he qualified with a first class degree in Civil Engineering, obtaining his Master's degree in Public Health Engineering in 1969 and a Diploma in Sanitary Engineering (Delft, The Netherlands) in 1975. He is fellow of the learned societies, - National Academy of Sciences, India, International Water Academy, Oslo, Norway, Institute of Engineers, Institution of Public Health Engineers, India, Indian Public Health Association, Indian Water Works Association, Institute of Waste Management, UK and International Association of Water Research, UK, etc. He is an honorary fellow of the National Environmental Science Academy.
For over four decades, Prof. K.J.Nath has played a variety of roles ranging from project engineer, researcher, academician, teacher, consultant, planner and in the process has own nationwide and international acclaim and recognition. As Professor of Environmental Sanitation and Director of the All India Institute of Hygiene & Pubic Health (AIIH&PH), Govt. of India (GOI), he did seminal works on Public Health & Hygiene, rural and urban water supply and sanitation, urban waste management, air and water pollution, water quality surveillance, environmental epidemiology and impact assessment. His expertise has been requisitioned by several National & International Organizations including the Planning Commission, CSIR, ICMR, Ministries of Environment, Health, Urban Development, and Rural Development, of the Govt. of India as well as State Govts., Research & Academic Institutes. At the International level, he has served on a number of occasions as a consultant/temporary Advisor and Member/Chairman of expert panels of the World Bank, WHO, UNICEF, UNEP, UNDP, WSSCC, UN-Habitat, US Trade development Agency etc. He served as a member of Steering Committee/Working Groups of the Planning Commission, Govt. of India from the 6th 5-Year Plan to 10th 5-Year Plan (1980-2005). He was a member of the Planning Commission High Power Committees on Solid Waste Management and Public Health (1997-98), Steering Committee of the Ganga Action Plan, National Task Force on Environmental Health, Chairman of the National Coordination Council on Water Quality, Rajiv Gandhi Drinking Water Mission and Chairman, Project Review Committee, Indo-American Commission on Environmental Health, Indian Council of Medical Research. He had the distinct privilege of addressing the 29th Session of the UN Council on Social, Cultural & Economic Rights, Geneva, Nov. 2002 which declared access to water as a Basic Human Right.
He has published more than150 research and review papers, books, monograms etc. He has received several awards including Rajiv Gandhi Memorial Sulabh Sanitation Award (1998), Environmental Scientist of the Country award by National Environmental Science Academy (1999). Best R&D paper award by Central Board of Irrigation & Power (1993) and Golden Jubilee award of the Indian Public Health Association (2007) for life time achievement and the Most Distinguished Public Health Engineer Award of the Institution of Engineers (India) (2008).