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View Larger Map   Head Office Galle Road, Ratmalana, Sri Lanka Tel: +94 11 2638999 (hunting), +94 11 2611589, +94 11 2637194 Fax: +94 11 2636449 Email: gm@waterboard.lk     Please visit our Regional Support Centres pages to obtain contact number of our Regional Offices. Any Complaint? New Grievances System has been introduced. Please click here to go to new Grievances System   © 2013 National Water Supply and Drainage Board. All rights reserved.