Organochlorine insecticides and PCBs in water samples collected from river Nilea.

Table 4: Organochlorine insecticides and PCBs in water samples collected from river Nile^a.

Sampling site	Concentration (ng l-1)
	∑HCH	∑HCBs	∑DDTs	Cyclodiene	∑OCPs	PCBs
Lake Nasser	650.46	81.3	841.47	20.86	1594.1	59.86
Aswan	220.36	36.66	1048.24	28.5	1333.8	56.38
Kom Ombo	187.71	31.16	1035.25	41.27	1295.4	85.65
Esna	177.62	32.2	586.3	75.37	871.49	15.65
Naga Hamady	123.16	24.56	297.72	40.65	486.09	32.84
Assiut	143.65	28.37	100.56	75.28	247.86	58.46
El-Minia	163.76	30.35	82.42	16.77	293.3	28.58
BeniSuef	285.4	42.85	56.83	26.5	411.58	25.3
Delta Barrage	22	10	2.65	29.75	64.4	8.28
Kafr El-Ziate	249.34	49.65	29.75	415.37	744.16	652.84
Dessouk	166.27	53.56	37.21	186.82	443.86	295.46
Edfina	107.26	77.8	10.133	228.11	423.3	71.76
Rosetta	185.87	16.7	98.51	32.39	333.42	140.52
El-Mansoura	151.01	92.61	102.67	48.43	394.72	32.43
Demietta	26.12	3.9	90.87	65.57	186.46	73.66

∑HCH = α, ß and γ-HCH, ∑HCBs = α, ß and γ-HCB; ∑OCPs = Total organochlorine pesticides; ∑DDTs = p, p'-DDD, p, p'-DDE and p, p'-DDT; Cyclodiene = heptachlor + aldrin + endrin + heptachlorepoxide; ^aAdopted from Abdel Wahaab and Badawy (2004) [133].