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modernsurvivalblog.com/survival-skills/how-long-to-boil-drinking-water

The moment your drinking water reaches a rolling boil, the water has already become safe to drink. According to the World Health Organization: Looking at their collection of testing records & data for bacteria, virus, and protozoa (source below), the worst common denominator is for Giardia (protozoa).

traveltips.usatoday.com/long-boil-water-purification-62933.html

Boiling water is the safest method of purification. Whether you're out camping, in a country with under or un-sanitized drinking water, or you fear your local water supply has become contaminated ...

gringosabroad.com/boil-drinking-water

The moment your drinking water reaches a rolling boil, the water has already become safe to drink.” While we generally filter our water we use tap water for cooking. Until recently we were only using tap water if it would be on the stove for 20 minutes or more – as we obediently followed the imaginary 20-minute boiling rule.

www.offgridweb.com/preparation/survival-science-minimum-water-boiling-time

Since we know that water boils* at 212°F (100°C), this means that by the time water has reached a rolling boil, it will be safe to drink. For an added margin of safety, the Centers for Disease Control (CDC) recommend boiling water for 1 minute just to be sure.

besurvival.com/guides/how-long-should-you-boil-water

Boiling water is sustainable, unlike filters and chemical treatment. As long as you have a source of heat and a fireproof vessel of some sort you can boil water. The Case For A Lid Whatever pot you use to boil your water in, make sure it has a lid. Boiling water without a lid is a huge waste of resources.

www.health.ny.gov/environmental/water/drinking/boilwater/faq_residents_and...

Boil Water Notices - Frequently Asked Questions for Residents and Homeowners . Protecting your family, yourself and others from potentially contaminated drinking water takes some thought and effort. Questions from residents and homeowners about how to do this often arise during a boil water event.

www.wikihow.com/Boil-Drinking-Water

Boil the water for 1-3 minutes, depending on your altitude. If you are in an area 5,000 ft (1.5 km) or more above sea level, boil the water for a full 3 minutes. At altitudes lower than this, boil the water for at least 1 full minute. Boil it for longer if you are unsure about the altitude in your area.

www.superprepper.com/purifying-boiling-water-for-drinking

Boiling only requires a heat source and something to boil the water in. Boiling purifies your drinking water. Some emergencies such as flooding can often compromise the integrity of drinking water. However, boiling kills the disease-causing microorganisms that are often in your drinking water. Disadvantages of Boiling Water

www.cdc.gov/healthywater/emergency/drinking/making-water-safe.html

Bring the clear water to a rolling boil for 1 minute (at elevations above 6,500 feet, boil for three minutes). Let the boiled water cool. Store the boiled water in clean sanitized containers with tight covers. If the water is clear: Bring the clear water to a rolling boil for 1 minute (at elevations above 6,500 feet, boil for three minutes).

www.epa.gov/ground-water-and-drinking-water/emergency-disinfection-drinking-water

Use bottled water or water you have properly prepared and stored as an emergency water supply. Boil water, if you do not have bottled water. Boiling is sufficient to kill pathogenic bacteria, viruses and protozoa (WHO, 2015). If water is cloudy, let it settle and filter it through a clean cloth, paperboiling water towel, or coffee filter.