The length of storage depends on the treatment of the water. When using the Berkey Biofilm Drops, water can be stored for up to 5 years.  It is recommended for long term storage to use 16 drops (1/2 tablespoon) of chlorinated bleach per gallon of water. Both treatments will inhibit bacteria growth. Once you are ready to use the water, purify it by using your Berkey system.

It is okay to use a plastic storage container for short term storage. However, it’s best to use a sterilized glass container. We recommend storing your water in a cool and dry place.

To learn more about Berkey Biofilm Drops, click here. To purchase Berkey Biofilm Drops, click here.