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

Table 2

Comparison of ΣHCHs and ΣDDTs in surface waters (ng·L⁻¹).

Location	ΣHCHs	ΣDDTs	Reference
Yongding river	<0.08–13.87 (spring),	<0.12–194.34 (spring),	[10]
	<0.08–19.53 (summer)	<0.12–88.68 (summer)
Honghu lake	0.95–7.04 (dry season),	0.06–0.49 (dry season),	[11]
	0.79–4.00 (wet season)	0.15–0.82 (wet season)
River Ravi	2.15–12.73 (postmonsoon),	4.09–33.28 (postmonsoon),	[13]
	2.53–6.90 (premonsoon)	3.36–93.15 (premonsoon)
Lake Small Baiyangdian	0.53–6.81	N.D.	[14]
Poyang Lake	4.38–59.65	2.31–33.4	[15]
River Hooghly	8–114	N.D.–26	[16]
River Chenab	3.6–200 (summer),	0.55–550 (summer),	[17]
	<6.7–330 (winter)	0.63–580 (winter)
Jiuxi Valley	1.71–8.12 (spring),	1.19–3.31 (spring),	This study
	9.94–23.5 (autumn)	1.90–6.23 (autumn)