Appendix B
Page 12
time. Company testing is well-designed with multiple controls. They have also
documentation that residual concentrations of chlorine dioxide were well0-maintained
during the recommended contact times. Chlorine dioxide does not have extended
persistence in water, so should not be used to maintain microbiologic purity of stored
water. Sunlight breaks down chlorine dioxide, so for optimal effect, keep the water bottle
in a dark location, such as inside a pack or bag, during disinfection time.
AquarMira (McNett Corp)
http://www.mcnett.com/
Pristine (Canada)
http://www.pristine.ca/
A stabilized solution of chlorine dioxide is mixed with phosphoric acid, which
activates the chemical and is then mixed with water for disinfection. Contact times for
inactivation of Cryptosporidium by Pristine range from 15 minutes in warm water using a
triple dose to 7 hours using a single dose in very cold water. The two solutions are mixed
together in a mixing cap and added to the water for treatment. Advantages include
effectiveness across broad range of water, temperature, and pH; no aftertaste or odor;
unaffected by freezing.
Personal size: 2 X 1 oz plastic bottles; Capacity: up to 120 liters (30 gal) of water; wgt:
2.8 oz; $10.99.
Pristine also makes 2 oz bottles, and larger packages for relief agencies to disinfect large
quantities.
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