Table 5.

Hazard quotient (HQ) and hazard index (HI) of trace elements in surface water from Honghu Lake.

Assessment Methods	HQ						HI	Target Risk
	Zn	Cu	Cd	Cr	As	Pb
Fuzzy assessment	(1.93 × 10−3, 2.43 × 10−3)	(2.18 × 10−3, 2.61 × 10−3)	(5.85 × 10−3, 6.81 × 10−3)	(2.35 × 10−2, 2.72 × 10−2)	(9.37 × 10−2, 1.14 × 10−1)	(2.73 × 10−2, 3.32 × 10−2)	(1.52 × 10−1, 1.86 × 10−1)	1 [26]
Certain assessment	2.13 × 10−3	2.42 × 10−3	6.28 × 10−3	2.53 × 10−2	1.03 × 10−1	3.02 × 10−2	1.70 × 10−1