Organochlorine Pesticides in Surface Water of Jiuxi Valley, China: Distribution, Source Analysis, and Risk Evaluation

Table 1

OCPs concentration in surface water from Jiuxi Valley (ng·L⁻¹).

Compounds	Spring, 12.03.2019–12.04.2019 (n = 32)			Autumn, 08.10.2018–08.11.2018 (n = 32)
	Mean	S. D.^a	Range	Mean	S. D.	Range
α–HCH	1.45	1.63	0.120–5.24	7.17	3.05	4.31–13.0
β–HCH	0.968	0.798	0.509–2.98	3.84	2.95	2.25–11.5
γ–HCH	1.08	0.327	0.844–1.84	3.16	0.854	2.42–5.02
δ–HCH	0.198	0.0589	0.142–0.312	0.598	0.0939	0.485–0.756
ΣHCHs	3.69	2.10	1.71–8.12	14.8	4.99	9.94–23.5
p,p′–DDT	1.11	0.332	0.715–1.84	1.48	0.403	0.849–2.12
o,p′–DDT	0.904	0.421	0.247–1.86	1.45	0.120	0.708–4.13
p,p′–DDD	0.0612	0.0318	<0.04–0.128	0.120	0.109	<0.04–0.316
p,p′–DDE	0.161	0.0680	<0.05–0.246	0.283	0.165	0.0724–0.622
ΣDDTs	2.23	0.615	1.19–3.31	3.34	1.31	1.90–6.23
Aldrin	0.736	0.524	<0.05–1.62	1.28	1.63	0.213–2.45
Heptachlor	0.426	0.554	<0.04–1.75	0.316	0.371	0.0634–1.23
Endrin	0.063	0.0312	<0.04–0.110	0.126	0.0980	<0.04–0.196
ΣOCPs	7.15	3.08	4.07–13.5	19.8	6.65	12.5–30.1

Note. Levels below the LOD were assumed to be half the LOD during the data analysis. ^aS. D. means standard deviation.