Yes, Our filter forms a physical barrier for pathogens, trapping the bacteria in your water on the surface of the ceramic while allowing clear, mineral-rich, great-tasting water through. The bacteria trapped on the surface is stifled with the anti-microbial formulation, that inhibits microbiological growth. This is added to our ceramic during manufacture. If your water flow reduces before you change your filter, remove and clean it before putting it back to extend its life.