Reports in the literature revealed that, considerable coliform
removal is achieved in stabilization ponds. Thus Malina
and Yousef (1964) reported a reduction of 88.8% in 11.4 days.
Meron et al. (1965) reported a reduction of 99.6%. Another
supported study was performed in this respect (Oswald et al.,
1967; Parhad and Rao, 1976).