Community QuestionSeen on 11 CBTs

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

Community-sourced. Answers may be wrong or out of date. Always verify with your official training portal before submitting. Not affiliated with any branch, agency, or vendor. Details.

Answer

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

9 of 11 indexed CBT versions give this answer·Answer index rebuilt Aug 16, 2026

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 ↗

Full course answer keys:SERE 100.2 Answers →

This question appears on

Army Sere 100 →Army Sere 100.2 →Jko Sere →Jko Sere Training →Sere 100 Training →Sere 100.2 Level A Sere Education And Training →Sere Jko →Sere Training Jko →Sere Training Online →What Are Some Methods To Purify Water Sere →What Are Some Methods To Purify Water Sere 100.2 →