Thus the present study revealed that, the study area of the River Cauvery and Bhavani are grossly polluted in
respect to coliform assessment which is mainly attributed to the open defecation, high amount of raw sewage
and barrage sedimentation, which require continuous monitoring and proper disinfection if the water is to be
used for drinking purposes. The severely contaminated stations of Rivers Cauvery and Bhavani with respect to
total coliform are Vairapalayam (1800 MPN/100ml) and Bhavani Sagar (920 MPN/100ml) This study
demonstrated a high degree of variability in the fecal and total coliform organisms in the stations of these rivers.