The Subterranean Arsenic Removal (SAR) Technology was developed by a consortium of European & Indian scientists led by Dr. Bhaskar Sengupta from Queen's University Belfast, UK & demonstrated at a location near Kolkata during 2005-06 www.qub.ac.uk/tipot. The technology was subsequently replicated successfully inarsenic affected areas in West Bengal through World Bank Development Marketplace 2006 programme. The technology involves a very simple and easily adaptable process to remove arsenic and other heavy metals from groundwater using controlled oxidation without production of sludge & not using any chemicals at all.