Does any filtration method remove parasites and bacterial contaminants?
Yes. The new EPA/CDC guidelines recommend only filters with a one micron or less absolute pore size to reliably remove parasites and bacteria. A 0.5 micron rated ceramic filter removes bacteria and parasites (even resistant Cryptosporidium and giardia). Leading water expert, Dr. Lemley of Cornell University, recommends only filters that meet NSF standard 53. Other filters have pores that are too large to stop dangerous microorganisms. Ceramic also protects the carbon inside it from breeding bacteria which is a problem with standard carbon filters.
