Physicochemical and Bacteriological Characterization of Industrial Wastewater Being Discharged to Surface Water Bodies: Significant Threat to Environmental Pollution and Human Health

Table 3

Pearson correlation coefficient matrix (r) to determine the interaction levels of metal and physicochemical properties of the analyzed wastewater samples (n = 18).

Variables	Cd	Fe	Ni	Mn	Zn	Cr	Cu	Pb	pH	EC	TDS	TSS	COD	BOD
Cd	1
Fe	0.821	1
Ni	−0.810	−0.951	1
Mn	0.832	0.529	−0.527	1
Zn	−0.467	−0.497	0.450	−0.292	1
Cr	−0.370	−0.442	0.413	−0.149	0.462	1
Cu	0.174	0.209	−0.031	0.283	−0.409	−0.332	1
Pb	−0.121	−0.282	0.198	−0.085	0.017	−0.343	0.169	1
pH	0.301	0.679	−0.535	0.087	−0.480	−0.551	0.608	−0.163	1
EC	0.084	−0.331	0.180	0.265	0.394	0.496	−0.591	0.105	−0.901	1
TDS	0.084	−0.331	0.180	0.265	0.394	0.496	−0.591	0.105	−0.901	1.000	1
TSS	0.044	−0.366	0.211	0.226	0.409	0.502	−0.607	0.113	−0.918	0.999	0.999	1
COD	−0.620	−0.896	0.825	−0.297	0.597	0.706	−0.348	0.192	−0.845	0.630	0.630	0.653	1
BOD	−0.633	−0.895	0.828	−0.315	0.597	0.702	−0.334	0.197	−0.820	0.602	0.602	0.625	0.993	1