- Three Log Inactivationsearch for term
- This term is used to describe the disinfection of water. It refers to the logarithmic reduction of bacteria or other microorganisms using a water filtration device. Single log reduction translates to a 90% removal. Two log (2-log) reduction equates to 99% removal, three log (3-log) to a 99.9% removal, and four log (4-log) to a 99.99% removal. When discussing the reduction of bacteria from a water source a three or four log reduction is desired.
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