In addition to my Alexapure (much better than Berkey..research for yourself and you will see…I can even send you a link to a YouTube comparison video) that I use every day I have a portable large filter from the maker of lifestraw and a lifestraw in my car emergency supplies. Having said all that again just got home from another long day at work & did not actually do the dirty water test. Honestly I am ready to do this if emergency situation is present & know how to do so but really not excited about the test.
