Water Treatment

Question 1

What size filter effectively removes all pathogens (including viruses)?

Answer 1

0.02 microns, or 20 nanometers.

As a comparison, bacteria are effectively filtered by 0.2 microns (10 times more).

Question 2

Can UV light kill viruses? How long does the sun take for a plastic water bottle?

Answer 2

UV light inactivates or kills all viruses, bacteria, and protozoa. Sunlight can penetrate 4” of CLEAR water in approximately 6-8hrs.

Question 3

How effectively does boiling disinfect water?

Answer 3

Boiling water reliably kills all pathogens regardless of altitude. It does not remove chemicals, radioactive substances, etc.

Question 4

Approx what ppm concentration should be used for halogen chemical disinfection? How long should you wait?

Answer 4

Iodine Tab 8ppm
Chlorine Tab 10ppm
At 60degrees F (15C), you need to wait 30 minutes before the water is clean to drink. At 40deg (5C) it takes 60 minutes.