Table 1

Effluent Concentration %	%Fish Mortality after 96hr (Sample-1)	%Fish Mortality after 96hr (Sample-2)	%Fish Mortality after 96hr (Sample-3)
C-Stage Effluent
0	0	0	0
30	30	20	30
50	70	40	60
70	80	70	90
E-Stage Effluent
0	0	0	0
30	40	30	50
50	80	70	70
70	90	70	90
H-Stage Effluent
0	0	0	0
30	20	25	30
50	40	35	40
70	60	55	70
Combined Bleach Effluent
0	0	0	0
30	20	30	20
50	50	65	45
70	70	75	70

Table 1: Fish Toxicity from bleach effluent of wood based mill at DO 7.3 to 7.7 mg/l and temperature of 25±2^°C.