Question

How long do you have to boil water to kill bacteria?

Answer 1

Boiling- If you don't have access to safe bottled water, you should boil your water before drinking it. The most effective way to kill disease-causing organisms, such as viruses, bacteria, and parasites, is to boil them. Some bacterial spores that aren't usually associated with waterborne sickness can survive boiling temperatures (e.g. clostridium and bacillus spores).

Complete answer:
Temperatures above 149°F (65°C) destroy microorganisms quickly, according to the World Health Organization (WHO). This temperature is far lower than that of boiling water or even a gentle simmer.
Pathogenic bacteria, viruses, and protozoa can all be killed by boiling (WHO, 2015). Allow turbid water to settle before filtering it with a clean cloth, a paper boiling water towel, or a coffee filter. For at least one minute, bring water to a rolling boil. Boiled water can be stored in sterilised, securely sealed containers in the refrigerator for three days, or at room temperature for 24 hours if kept out of direct sunlight.
For at least one minute, bring water to a rolling boil. Boil water for three minutes at heights above 5,000 feet (1,000 metres).
Drinking contaminated water can cause stomach pain, nausea, vomiting, diarrhoea, and dehydration, among other symptoms. No one likes to go through that, so if you don't have any bottled water on hand, boiling the water for a minute will make it drinkable.

Note:-
Boiling water has the following disadvantages: it takes time and requires access to a heating source. Fire, stove, or kettle, for example, are ineffective against possibly dangerous compounds or metals in the water. The smell and taste aren't much better.