Question

In many places, how can drinking from Rivers and ponds affect a person's health?

Answer 1

Rivers and ponds contain poisonous chemicals that imperils your lives.

Answer 2

Drinking from unsanitary water sources can give you many different diseases. Most diseases are deadly if not treated and can be very painful. Some of the diseases include
Amoebiasis
Shigellosis
Cholera
Cryptosporidiosis
Giardia