Question

What quality of bleaching powder is used in water treatment?

Answer 1

Bleaching powder is used in power plants for purification. To purify the water, bleaching powder is added because is a purifier and a disinfectant too.
It is widely used for water treatment. It is used for disinfection of water in the treatment process. The chlorine released by the Bleaching powder kills Pathogens (Disease causing Bacteria).

Answer 2

Water treatment plants generally don't use bleaching power (solid calcium hypochlorite) the use chlorine gas or sodium hypochlorite, theses are used to kill bacteria, fungi and algae in the water and to leave a tiny amount in the water to keep the pipes to your home free of dangerousmicrobiological life.

hope it helps !!