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Untreated water is drinking water that has not been chemically
treated, filtered, or boiled to eliminate infectious bacteria, viruses, and
parasites (such as Giardia lamblia). These organisms can
cause diarrhea and illness.
Many infections that result from drinking untreated water go away
by themselves after a few days, but some require treatment.
Current as of:
March 3, 2017
William H. Blahd, Jr., MD, FACEP - Emergency Medicine & H. Michael O'Connor, MD - Emergency Medicine
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