Since the Toledo water crisis occurred, many people have wondered if any home filter systems exist that could have protected against the toxin that contaminated tap water to over 400,000 people. Experts have agreed on one answer, no. This is based on the fact that no filter systems have been tested for the removal of this toxin. A recent article published in the Toledo Blade said this:

 “Even though filter manufacturers can’t guarantee their systems will filter out the Lake Erie toxins, that doesn't mean that they won’t. It just means that they haven’t done sufficient testing for the toxins. The manufacturers now say that they are looking at testing their equipment for microcystin toxins."

And that’s exactly what we did. The Auro Water Purification Solution and Auro Water Filtration System* were sent to a laboratory that specializes in cyanotoxin analysis and the identification of algae/cyanobacteria, to test for the removal of Microcystin-LR. One liter of water was spiked with 10 ppb of Microcystin-LR, nearly four times the amount that was found in Toledo’s water supply. Auro Liquid Gold Solution was added to the spiked water and poured through the filter system. Below is a summary of the results.

Summary of Results

Test Sample                                             MC Levels (µg/L)
Pre Filtration (10 ppb MC-LR)            10.8
Post Filtration (10 ppb MC-LR)           ND
                                  ND = Not detected above LOD/LOQ  (LOD/LOQ = 0.15 µg/L)

*NOTE: When using the Auro Solutions Water Filtration System to filter Microcystin-LR, it is advised that the 4-Layer Earth Filter be replaced every 300 gallons.


Green Water Laboratories Microcystin Filtration System Report – click to download. 

Green Water Laboratories Microcystin Filtration System Report DATA – click to download.