Polychlorinated Biphenyls Water Pollution along the River Nile, Egypt

Table 1

Mean concentrations of PCBs (µg/L⁻¹) in water samples from the River Nile, Egypt.

Site No.	Sampling site	Region	Mean concentration of PCB congeners (µg/L^−1)										Total PCBs
			PCB congener 28	PCB congener 52	PCB congener 44	PCB congener 70	PCB congener 101	PCB congener 153	PCB congener 118	PCB congener 105	PCB congener 138	PCB congener 180
1	Alwasta-Beni Sweif	Greater Cairo	ND	1.188	2.222	1.089	2.165	1.462	0.821	1.704	2.482	1.370	14.503
2	Helwan
3	Cairo
4	Alaeat-Giza
5	Giza town
6	Alknater-Giza
7	Qalubiya
8	Monofeya	Nile Delta	0.161	0.917	4.391	1.867	1.211	0.951	0.188	1.412	5.322	2.351	18.771
9	Belbas
10	Benha
11	Alazezea-Menia El Kamh
12	Menia El Kamh town
13	Zagazig
14	Mansoura
15	Fraskour-Damietta	Nile Estuaries	2.708	0.158	1.866	1.411	0.924	5.189	ND	3.949	2.315	1.646	20.166
16	Damietta town
17	Ras El-bar
18	Gamasa
19	Rosetta town
20	Edfina-Rosetta
Total mean of PCB congeners ± standard error			2.869 ± 0.27	2.263 ± 0.21	8.479 ± 0.47	4.367 ± 0.35	4.3 ± 0.29	7.602 ± 0.41	1.009 ± 0.11	7.065 ± 0.46	10.119 ± 0.49	5.367 ± 0.34	53.44

ND = not detectable.
Number of samples = 60 (3/each sampling site).