Residues, Distributions, Sources, and Ecological Risks of OCPs in the Water from Lake Chaohu, China

Table 4

The residual levels of OCPs in the water from Lake Chaohu (ng/L).

	SD	Maximum	Minimum	Arithmetic mean	Geometric mean	Detection rate
α-HCH	0.53	2.40	0.11	0.47	0.33	100.00%
β-HCH	0.51	2.19	0.36	0.92	0.80	100.00%
γ-HCH	0.38	1.77	0.06	0.29	0.19	100.00%
δ-HCH	0.13	0.60	N.D.	0.08	0.06	83.78%
HCHs	1.45	6.92	0.55	1.76	1.41	100.00%
o,p′-DDE	1.93	7.03	N.D.	1.42	1.01	62.16%
p,p′-DDE	0.04	0.16	N.D.	0.02	0.03	32.43%
o,p′-DDD	0.08	0.38	N.D.	0.03	0.18	16.22%
p,p′-DDD	0.22	1.06	N.D.	0.06	0.07	24.32%
o,p′-DDT	0.46	2.32	N.D.	0.16	0.15	35.14%
p,p′-DDT	0.30	1.15	N.D.	0.23	0.30	62.16%
DDTs	1.92	7.03	N.D.	1.91	1.10	97.30%
HCB	0.08	0.35	0.06	0.17	0.15	100.00%
Heptachlor	0.25	1.09	N.D.	0.17	0.15	64.86%
Aldrin	2.87	12.22	0.15	2.83	1.76	100.00%
Isodrin	0.17	0.63	N.D.	0.16	0.12	91.89%
γ-chlodane	0.02	0.14	N.D.	0.01	0.01	32.43%
Endosulfan I	0.03	0.15	N.D.	0.02	0.03	62.16%
Endosulfan II	0.45	2.70	N.D.	0.09	0.01	48.65%
Endosulfan	0.46	2.80	N.D.	0.10	0.30	86.26%
Endrin	0.08	0.37	N.D.	0.03	0.08	27.03%