How drinking water can be disinfected?

Drinking water can be disinfected by using bleaching powder [Ca(OCl)₂].

i. Bleaching powder is an agent which removes and kills the unwanted bacteria, microorganisms and germs in the drinking water.

ii. If the microorganisms and germs are not removed from drinking water, then it can cause number of harmful diseases.

iii. Hence, drinking water must be made disinfected by using bleaching powder.