Singapore's 4 national taps are:
1) Water from local catchment
2) Imported water from Johor
3) Desalinated water from the sea
4) Reclaimed/Recycled water from local waste water (NEWater)
1) Water from local catchment
2) Imported water from Johor
3) Desalinated water from the sea
4) Reclaimed/Recycled water from local waste water (NEWater)