By Nurul Halawati Mohamad Azhari KUALA LUMPUR — Every day, Malaysians use an average of 65 litres of water a day, which will ultimately become sewage water that needs to be treated by Indah Water. Has anyone ever wondered what happens to the sewage water from their bath, laundry and other domestic chores? Imagine what would happen if the sewage was left untreated.