Progress in the Research of the Toxicity Effect Mechanisms of Heavy Metals on Freshwater Organisms and Their Water Quality Criteria in China

Table 2

Comparison of water quality criteria of heavy metals in China and the US EPA [12, 91].

Heavy metal	China (μg/L)		US EPA (μg/L)
	Acute	Chronic	CMC	CCC
Zn	89.7	34.5	120	120
Cd	2.10–7.30	0.21–0.23	2	0.25
Cr	45.79	14.22	16	11
Cu	30	9.44	12	9
Hg	1.743	0.467	1.4	0.77
Pb	131	5.1	67.54	25.46