Log reduction
Log10 Reductions
A mathematical term referring to a 10-fold (or 90%) reduction in the quantitative value of a microbial population.
For example, a 1-log10 reduction means the quantitative value of a microbial population is reduced by 10 times or by 90%. A 2-log10 reduced means the quantitative value of a microbial population is reduced by 100 times or 99%.
Often 4 to 6 log10 reductions are suggested for microbes via treatment thus a pathogen found at 1million per liter in sewage would be reduced to 100 and 1/Liter with 4 to 6 log10 reductions.
