Grey water consists of which of the following?

1.Kitchen waste water

2.Waste water containing faecal matter

3.Waste water from industrial units

4.Bathroom waste water

5.Water from agricultural run-off

A1, 2, 3 and 5 only

B1, 3, 4 and 5 only

C3 and 5 only

D1 and 4 only ✓ Correct

Correct answer: (D) 1 and 4 only

Explanation

Grey water is gently used household water without sewage, mainly from the kitchen and bathroom.

Kitchen waste water counts as grey water despite carrying some grease and food bits.

Bathroom waste water from washing and bathing is a classic grey water source.

Waste water containing faecal matter is black water, not grey water.

Waste water from industrial units carries chemicals and is not household grey water.

Agricultural run-off is field drainage and falls outside grey water.

Reusing grey water for gardening and flushing saves fresh water.

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