2009 NATH, Kumar Jyoti (b. 1941) ME(PH),DSE(Netherlands),FIE,FNSI,FIPHE,FIWWA,FNESA, Chairman, S&T, Sulabh International Social Service Organisation, CG-184,Sector-2,Salt Lake City Kolkata – 700091; Res. AK-284, Salt Lake City, Kolkata – 700091; Tel: (033) 40077613(O), 23374612(R), 09831275668, 09831037646(M); Fax: 23342171; Email: ; ; Sp. Environment/Public Health/Sanitation.