Community QuestionSeen on 11 CBTs

What are some methods to purify water? (Select all that apply)

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Answer

-Chemically treating water with chlorine or iodine (correct) -Purifying with a commercial micro filter (correct) -Boiling vigorously for at least one minute (correct)

VERIFIED AGAINST THE OFFICIAL SOURCE

“Boiling is the safest method for purifying water. Bringing water to a rolling boil for one minute at sea level will kill all waterborne pathogens. If above 8,000 feet, the boiling time should be extended to 3 minutes.”

— ATP 3-50.21, Survival (18 September 2018), Ch. 3 Water, para 3-41 ↗

Alternate answers seen on other CBTs

The same question shows up worded slightly differently across CBT versions. Here are the other answer variants we've indexed.

Chemically treating water with chlorine or iodine (correct) Boiling vigorously for at least one minute (correct) Purifying with a commercial micro filter (correct)

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Chemically treating water with chlorine or iodine (correct) Purifying with a commercial micro filter (correct) Boiling vigorously for at least one minute (correct)

What Are Some Methods To Purify Water Sere →

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