Effectiveness of Entropy Weight Method in Decision-Making

Table 1

Threshold for classification of pollutants (mg/L).

Evaluation index	Excellent	Good	Medium	Bad	Worst
CODMn	[0, 2]	(2, 4]	(4, 6]	(6, 10]	(10, 15]
NH3	[0, 0.15]	(0.15, 0.5]	[0.5, 1]	(1, 1. 5]	(1.5, 2]
Sulfide	[0, 005]	(0.05, 0.1]	(0.1, 0.2]	(0.2, 0.5]	(0.5, 1]