Question

why is it harmful to discharge untreated sewage into water bodies​

Answer 1

Explanation:

Sewage contains various contaminants including disease causing bacteria and other microbes. If untreated sewage is discharged into rivers or seas, then the water in the rivers or seas we also get contaminated. If this contaminated water is used for drinking, then it can cause diseases such as Cholera typhoid, dysentery, etc. Which may lead to death.

This is why it is harmful to discharge untreated sewage into water bodies.

Answer 2

Untreated sewage is very dirty and dangerous and when discharged in the water bodies, the water also gets polluted and causes diseases like disentry and cholera etc.