Table 6.

Inter-elemental correlation of heavy metals in samples of waste water and soils that were significant or nearly significant.

Pairs correlated	Correlation co-efficient (r - value)	P value
Cd (soila) & Hg (soil)	0.839	0.009**
Tl (waste water) & Cd (soil)	0.967	0.000**
Tl (waste water) & Cd (waste water)	0.631	0.069
Tl (soil) & Cr (waste water)	−0.641	0.087
Tl (soil) & Cd (soil)	0.672	0.068

^aType of sample analyzed is placed in brackets; *correlation significance at 0.05 level (2 tailed); **correlation significance at 0.01 level (2 tailed).