Table 7.

The contamination factor (CF) and different categories of contamination (as defined by the mean CF) for each of the heavy metal studied in Wuhan.

Metal	Ag	As	Cd	Co	Cr	Cu	Mn	Mo	Ni	Pb	V	Zn
HZ	1.00	1.00	1.00	1.00	1.00	1.00	1.00	2.47	1.00	1.00	1.00	1.00
HX	1.58	1.43	0.85	3.54	2.00	1.31	2.49	2.35	1.66	1.44	1.80	1.17
JX	1.40	1.14	0.81	1.89	2.22	0.95	1.74	2.41	1.64	1.38	1.21	1.32
LY	1.20	1.02	0.62	2.13	1.55	1.05	2.09	2.18	1.52	1.26	1.39	1.19
MA	1.15	1.28	0.58	2.21	1.64	1.00	2.29	2.29	1.61	1.13	1.98	1.01
TR	1.33	1.65	0.74	2.17	2.10	1.19	1.62	2.58	1.96	1.13	2.11	1.95
GS	3.47	2.20	1.58	2.83	2.05	2.14	5.51	3.86	1.90	3.55	1.64	1.70
WS	3.19	1.04	1.08	2.79	1.96	1.31	2.13	2.41	1.58	2.66	1.37	1.54
WB	1.11	1.67	0.57	2.71	4.24	1.03	2.33	3.40	2.06	1.04	2.11	1.00
Mean CF	3.47	2.20	1.58	3.54	4.24	2.14	5.51	3.86	2.06	3.55	2.11	1.95
Category	C2	C2	C1	C3	C3	C2	C3	C2	C2	C2	C2	C2