Quick Answer
Boiling water is the most effective method to kill bacteria, viruses, and other pathogens, making it safe for drinking in the backcountry. However, it only kills pathogens and does not remove chemicals, heavy metals, or other contaminants. Boiling water for 1-3 minutes is sufficient to kill most pathogens.
Boiling vs Other Methods
Boiling is the most reliable method to purify water in the backcountry, but it requires fuel and can be time-consuming. Other methods, such as using water filters or purification tablets, can be more convenient and efficient. Water filters can remove up to 99.99% of contaminants, including bacteria, viruses, and parasites, and can be used in a wide range of backcountry settings. Purification tablets can kill pathogens in as little as 30 minutes and are a good option for emergency situations.
Understanding Boiling Times and Temperatures
To kill pathogens, water must be brought to a rolling boil for 1-3 minutes. A rolling boil is defined as when the water is vigorously bubbling and has a temperature of 212°F (100°C) at sea level. However, at higher elevations, the boiling point of water decreases, and the boiling time may need to be adjusted. For example, at 5,000 feet, water boils at 203°F (95°C), so the boiling time may be reduced to 2-3 minutes.
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