Where do you get that from? According to https://zerowater.com/pages/frequently-asked-questions https://zerowater.com/pages/frequently-asked-questions, > Does

Where do you get that from? According to https://zerowater.com/pages/frequently-asked-questions https://zerowater.com/pages/frequently-asked-questions, > Does the ZeroWater® 5-stage filter reduce bacteria? > The current system is meant to be used with municipally treated, potable water as the current filter will not remove microbiological contaminants. > Does the ZeroWater® 5-stage filter reduce cryptosporidium? > At this point ZeroWater® 5-stage filters have not been tested for the removal of cryptosporidium(microbiological cysts). Both ZeroWater and Brita are explicit that their filters are meant to be used with water that the government has already deemed safe to drink.