TECHNICAL MEMORANDUM
General
Ecology® Water
Purifiers Certified to EPA Guide Standards
Seagull® IV & Nature
Pure® Ultrafine™ Water Purifiers
First Need® Portable Water Purifiers
Three series of tests were conducted
by the independent laboratory at the University of Arizona
to document removal of microbiological contaminants according
to current EPA Guide Standard and Protocol for Testing Microbiological
Water Purifiers.
The purifiers were operated for 100%
of their rated capacity and challenged periodically with high
concentrations of bacteria, cysts and virus. At the 60% and
75% test points the units were challenged with “worst case” water
according to protocol. Additionally, the systems were allowed
to stagnate for 48 hours after the 50%, 75% and 100% test points
to demonstrate that no microbiological growth through the
cartridge occurred.
% Reduction (geometric average
of 3 units)
Test Point
% of Rated Capacity
Bacteria
Klebsiella terrigena
Cysts
Cryptosporidium
Virus
Polopviurs type I
Rotavirus SA-11
start
>99.9999
>99.99
>99.99
25%
>99.9999
>99.99
>99.99
50%
>99.9999
>99.99
>99.99
48 hr. stagnation
NG
NG
NG
*60%
>99.9999
>99.99
>99.99
*75%
>99.9999
>99.99
>99.99
48 hr. stagnation
NG
NG
NG
*90%
>99.9999
>99.99
>99.99
*100%
>99.9999
>99.99
>99.99
*= Worst case challenge
water. NG = No Growth
Conclusion:
General Ecology Inc.’s Seagull IV, Nature Pure
and First Need water purifiers met the EPA
Guide Standard as Microbiological Purifiers
by removing bacteria, cysts and virus without
the use of chemical additives or multiple processing.
