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Why we should filter raw water?

Author: Time: 03/05/2013 Read: 973

 

The World Health Organization (WHO) attributes 80% of all travel diseases to contaminated drinking water. You never know what's in the water, it makes sense to always protect yourself with a quality water system. A pristine stream may be safe one day and contaminated the next. It all depends upon what's happening upstream. Microorganisms generally come from human and animal waste and are spread by rain and run-off. The EPA reports that 90% of the world's fresh water supply is contaminated.

Drinking water contains three groups of pathogenic microorganisms:

Family Known germs Size range
Viruses Hepatitis A, Norwalk Virus, Rotavirus, Poliovirus ~0.02 - 0.2 microns
Bacteria E-coli (Escherichia coli), Salmonella (Salmonella typhimurium), Cholera (Vibrio cholerae) 0.2 - 5 microns
Protozoans Amoeobiasis (Entamoeba histolytica), Giardia lamblia (Giardia intestinalis), Cryptosporidium (Cryptosporidumparvum) 1 - 15 microns
 
"We highly recommend treating water from every source in the backcountry. You don't know what's upstream - not just people but animals - and you can get infected."

                                                                                                     Center for Disease Control and Prevention,
                                                                                                      U.S. Government