Drinking River Water

In developed countries, we use water from rivers for drinking and other domestic uses.  It's because we treat the water.  Also, we manage and control runoff and sanitation into the river.

In poor developing countries, they still use water from rivers for drinking and other domestic uses.  But they do not have the means to treat the water.  Also, they do not manage runoff and sanitation into the river.  Therefore, their water is often deadly.