Energy Guide

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©Puralytics Confidential, do not use without permission. Jan 13, 2012
Cascade Designs Inc. – Seattle, Washington
Cascade Designs Inc (CDI) is a company in Seattle, Washington that makes several water treatment and
storage products for outdoor recreational and military use. Their microbiological laboratory tests various
water purification products against EPA and military guidelines for performance.
Over a six month period, CDI performed a series of tests measuring chemical contaminant reduction and
microbial inactivation on the SolarBag. The tests were performed outdoors in both the morning and
afternoon sun, under both clear and overcast skies; ambient temperatures ranged from 15 - 30 °C. CDI
also used specially formulated challenge water designed to represent developing world water supplies,
as well as challenge water defined in EPA and NSF P248 protocols.
The tests showed that the SolarBag was able to reduce 99.9999% of all bacteria, 99.99% of all virus, and
over 90% of the chemical contaminants in just 2 hours on warm sunny days while taking 4 hours in rainy
overcast conditions.
Ministry of Water and Irrigation – Kisumu, Kenya
The government of Kenya requires an in house performance test to approve product distribution within
their borders. Puralytics provided the Ministry of Water and Irrigation with the necessary SolarBags and
they tested bacterial reduction in water from Lake Victoria through the water quality laboratory in
Kisumu.
Water was pulled from a commonly used drinking water source in Lake Victoria where the Nzoia river
discharges at the lake. The sample was poured into the SolarBags through two layers of standard cloth
to reduce the turbidity. The SolarBag was left under direct sunlight for 2 hours. After exposure there was
no reproducing coliform detected in the product water, indicating a total kill of any bacteria initially
present in the water source.
The ministry concluded that the SolarBag is a recommended treatment method for household drinking
water.
Kanagawa Academy of Science and Technology – Kawasaki City, Japan
The SolarBag was investigated as a means to address water accessibility challenges in the wake of the
April earthquake and tsunami. The Kanagawa Academy of Science and Technology (KAST) used its
facilities to test the SolarBag in a controlled environment under a UV lamp to measure bacterial coliform
inactivation and organic contaminant reduction.
A SolarBag was filled with water from an outdoor canal that had been filtered through a simple cloth
material. The bag was left under the lamp for 4 hours and sampled for coliform and total organic carbon
(TOC).