Rarely have there been a raw water source that is suitable for domestic use, treatment process is normally required to exterminate all materials or elements that are not suitable for human consumption.
Average daily household consumption is 5000 liters of water, where only 5 percent is used for consumption and food preparations while the remaining
95 percent is used for cleaning,watering and others.
In Malaysia,surface water is the main source of raw water. High rainfall flows into rivers, ponds, lakes or human made dams.
Some of the rainfall is absorbed into the ground until it reaches a waterproof stone layer. This water can be obtained through wells or it can flow out as spring water in hill slopes. This water source
is known as ground water.