A Filter is different than a Purifier

Berkey Purifier vs common water filter

There are two different classification standards for water treatment devices.

The first classification is a water filter, to meet this standard a water treatment device must remove at least 99.99% of pathogenic bacteria. This is known in the water filter industry as a log 4 reduction.

The second classification is a water purifier, to meet this standard a water treatment device must remove at least 99.9999% of pathogenic bacteria (log 6 reduction). In addition the water purifier must be capable of reducing viruses by at least 99.999% (log 5 reduction).

All Berkey systems that contain the Black Berkey elements are classified as purifiers. In fact Berkey Purifiers remove 99.9999999% (log 9 reduction) of pathogenic bacteria. To our knowledge no other water filtration device in the world can match that claim.

Please check our competition and see for yourself what classification they claim. Some are able to reach the level of purification using harsh chemicals like iodine or chlorinating tablets. We use no chemicals only simple microfiltration coupled with our unique ionic adsorbtion process. These two processes combined offer unmatched abilities.