Approvals & References in Drinking water We are the first company in ASIA to have NSF ANSI 60 certification for use in drinking water meant for human consumption. Approvals References List of Approvals & References – Ministry of Drinking Water and Sanitation.Gujarat Water Supply and Sewerage Board.Gujarat State Electricity Corporation Limited. Public Health Engineering Department – Rajasthan. Public Health Engineering Department – West Bengal. Punjab Water Supply and Sanitation Department. Uttar Pradesh – Jal Nigam/ Uttar Pradesh – Jal Sansthan.Karnataka Water & Sewerage Board Approvals & References in Drinking water