The water test results below show the Black Berkey elements being required to filter two different samples of water containing 3 known types of hostile bacteria that are often found in untreated water. Note the row labeled effluent, this is the water that passed through the filter and it shows it being greater than a log 9 reduction which equates to 99.9999999% reduction or as stated below the chart in the Additional analysis: " Filtrate samples were pure H20 " Read more reports below.
The water test below show results for the Black Berkey elements when required to filter water containing Lead, Chloroform (represents volatile organic compounds and trihalomethanes) and chlorine. milligrams per liter (mg/L) is equivalent to parts per million (ppm), as stated in this document. The lead was reduced from 170 ppb(.017ppm) to less than 6 ppb, that's greater than 96% reduction.VOC's and Trihalomethanes were reduced from 170 ppb (.017 ppm) to as low .5 ppb (.0005 ppm) that's greater than 99.8%. Chlorine was reduced from 2 ppm to .01 ppm that's greater than 95% reduction.
