Can you drink rainwater?
Worldwide, rainwater is the largest source of drinking water after groundwater. In many countries, the quality of rainwater is much better than that of groundwater or tap water. The simplest measure against biological contamination is boiling.
However, rainwater should not be used directly as drinking water unless it has undergone appropriate treatment and purification to ensure its quality and safety.
This is why we initially refer to rainwater as service water, for all uses that have nothing to do with human consumption or personal hygiene. However, there are very simple methods of treating rainwater so that it becomes drinkable. Three-stage cartridge filters, reverse osmosis systems or ceramic filters have proved their worth.