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The bio-sand water filter was developed by Dr. David Manz of the University of Calgary, Alberta, Canada. It has been extensively tested in laboratories at the University of Calgary, MIT and Dartmouth College, and has proven economical and effective in thousands of field installations.
Many technical reports have been published attesting to the effectiveness of the water filtration system. The reports confirm that under optimal operating conditions, the bio-sand filter is capable of removing 97% of fecal coliform, 100% of giardia cysts, 99.98% cyptosporidium oocysts, 100% worms, 100% parasites, and up to 90% of organic and inorganic toxicants from contaminated water.
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