Filtered water from Berkey systems can be used for preparing baby bottles and as drinking water for infants. Contaminents have been removed from the water whilst minerals have been left. Additional precautions must be taken if the filtered water comes from untreated sources such as rainwater or a wells to ensure the system is fully operational and that the filtered water does not have any left over contaminents due to extremely high pollution levels or an unknown pollutant that may not be entirely removed from the filtered water. More information on filtering water from a natural source can be found here.