Element Soils Road Dust Stream    
Range Mean ± Std.Dev Range Mean ± Std.Dev Range Mean ± Std.D + ++
Cu 23-Sep 15.23 ±3.56 12-117 49.46 ±24.3 Jul-37 27.8 ± 12.28 21 27
Pb 11- 1056 61.97 ±188.6 14-679 110.65 ±124.3 16- 127 69.0 ± 39.95 35 58
Zn 15-348 68.7 ±71.9 86-730 274.7 ±149.8 36-412 264.4 ± 162.7 139 156
Ni 12-Jun 8.97 ±1.7 21-May 11.24 ±3.6 15-Apr 9.20 ± 3.96 8 10
Co 13-Mar 5.74 ±2.1 25-Feb 5.75 ±3.3 7-Feb 4.8 ±1.92 5 4
Mn 238-1503 483.4 ±604.1 175-1508 416.35 ±181.5 78 -370 261.6 ±112.8 440 280
As 11-Feb 3.267 ±2.05 22-Feb 4.67 ±3.7 Bdl- 19 11 ±8.09 2 3
Th 18-Apr 9.17 ±3.71 30-Apr 6.91 ±3.9 19-Jul 10.8 ±4.82 7 8
Sr 6 – 25 11.5 ±4.66 Jun-71 18.94 ±10.2 20-Apr 15.0 ±7.0 17 12
V 35- 121 78.37 ±23.51 34-113 57.7 ±18.4 29-135 80.0 ±40 68 72
Cr 25 -94 50.2 ±18.21 34-213 95.41 ±41.7 36-177 111.4 ±50.7 89 103
Ba Dec-53 25.90 ±10.58 25-195 60.944 ±28.11 13- 60 44.0 ±17.98 56 50
± Background concentration for soils and road dust ± ± Background concentration for stream sediments Bdl-Below Detection Limit
Table 1: Summary of element concentration of Ijebu-ode and environ.