Toad tad poles were exposed to cassava effluents of 10ppt, 5ppt, 2.5ppt, 1.0ppt, 0.5ppt and 0ppt (that is 100ml, 50ml, 25ml, 10ml, 5ml and 0ml respectively in 10litres of water). It was observed that time of first death of tad pole is 25, 40, 103, 120,164 and 250 hours in the same order. The time of total mortality of toad tad pole was 32, 150, 220, 250, 280 and 475 in that order up to the concentration 0ppt. It was observed that the period to record death increases as the concentration of cassava effluent decreases. Time taken to have first death and total mortality in toad tad pole upon exposure to different concentrations of cassava effluents were express graphically and also shows the same trend. Standard Deviation for the time to record first death in tad pole is 75.82 and Standard Deviation for the time to record total mortality in tad pole is 88.