cells and is depend upon the availability of nutrients in the
environment. Turbidity measurement or optical density of the
cell suspensions was related to cell number. Fig. 2 shows the
variation of optical density in each sample was measured at
wavelength 600 nm. The results show the optical density of
samples has correlation with the number colonies per unit
(CFU). The turbidity each various samples were lowest in G4
and the turbidity became higher at sites G1, G2, and G3,
respectively.