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Table 4

Pearson correlation coefficient analysis for drinking and wastewater parameters to find extent of correlation among parameters

pHTempTurb.Coli formFecal formTotal hardnessCa hardnessMg hardnessAlkTSTDSTSeSClNiZnCdCrPb
Drinking water parameters 
pH 1.000                  
Temp − 0.671 1.000                 
Turbidity − 0.020 − 0.020 1.000                
Coliform − 0.897 0.927 0.056 1.000               
Fecal form − 0.652 0.336 0.764 0.567 1.000              
Total hardness 0.988* − 0.749 − 0.116 − 0.943 − 0.704 1.000             
Ca+2 hardness 0.597 0.159 − 0.320 − 0.220 − 0.697 0.530 1.000            
Mg+2 Hardness − 0.021 − 0.704 0.296 − 0.392 0.335 0.067 − 0.811 1.000           
Alkalinity 0.890 − 0.760 − 0.406 − 0.918 − 0.847 0.946 0.475 0.094 1.000          
TS − 0.795 0.964* − 0.185 0.958* 0.308 − 0.835 0.011 − 0.590 − 0.766 1.000         
TDS − 0.793 0.964* − 0.189 0.956* 0.304 − 0.833 0.015 − 0.592 − 0.763 1.000** 1.000        
TSeS − 0.534 0.985* − 0.049 0.848 0.216 − 0.624 0.325 − 0.812 − 0.653 0.919 0.920 1.000       
Chlorides − 0.020 − 0.020 1.000** 0.056 0.764 − 0.116 − 0.320 0.296 − 0.406 − 0.185 − 0.189 − 0.049 1.000      
Ni 0.507 0.052 − 0.714 − 0.261 − 0.911 0.508 0.888 − 0.694 0.606 0.023 0.028 0.191 − 0.714 1.000     
Zn 0.918 − 0.901 − 0.102 − 0.997 − 0.621 0.962* 0.285 0.327 0.942 − 0.935 − 0.933 − 0.813 − 0.102 0.331 1.000    
Cd − 0.352 0.774 0.566 0.668 0.572 − 0.493 0.173 − 0.544 − 0.709 0.598 0.596 0.788 0.566 − 0.199 − 0.662 1.000   
Cr − 0.095 0.595 0.660 0.440 0.479 − 0.248 0.294 − 0.517 − 0.518 0.371 0.370 0.642 0.660 − 0.140 − 0.433 0.962* 1.000  
Pb 0.527 − 0.752 − 0.644 − 0.747 − 0.761 0.651 0.090 0.343 0.850 − 0.617 − 0.614 − 0.722 − 0.644 0.431 0.757 − 0.965 − 0.890 1.000 
Wastewater parameters 
 pH Temp BOD COD TKN Total hardness Ca hardness Mg hardness Alkalinity TS TDS TSeS Chloride Ni Cd Cr Pb  
pH 1.0000                  
Temp − 0.8758 1.0000                 
BOD − 0.3878 0.7808 1.0000                
COD 0.6668 − 0.3852 0.0433 1.0000               
TKN 0.5340 − 0.2255 0.1697 0.985* 1.0000              
Total hardness − 0.9234 0.989* 0.6883 − 0.4060 − 0.2444 1.0000             
Ca+2 hardness − 0.965* 0.972* 0.6138 − 0.5367 − 0.3851 0.989* 1.0000            
Mg+2 hardness − 0.8772 0.987* 0.7350 − 0.2994 − 0.1327 0.993** .965* 1.0000           
Alkalinity − 0.7736 0.6154 0.2569 − 0.954* − 0.8999 0.6103 0.7139 0.5215 1.0000          
TS 0.0567 0.3700 0.8314 0.0909 0.1322 0.2278 0.1738 0.2658 0.1491 1.0000         
TDS 0.0530 0.3719 0.8310 0.0840 0.1253 0.2297 0.1767 0.2669 0.1555 1.000** 1.0000        
TSeS 0.0558 0.3710 0.8321 0.0909 0.1324 0.2288 0.1748 0.2668 0.1493 1.000** 1.000** 1.0000       
Chlorides − 0.9141 0.986* 0.7212 − 0.5313 − 0.3830 0.976* 0.983* 0.955* 0.7377 0.3456 0.3486 0.3465 1.0000      
Ni − 0.8969 0.998** 0.7552 − 0.4436 − 0.2875 0.989* 0.981* 0.979* 0.6640 0.3530 0.3553 0.3540 0.995** 1.0000     
Cd − 0.996** 0.9132 0.4678 − 0.6487 − 0.5107 0.9484 0.983* 0.9071 0.7791 0.0331 0.0367 0.0340 0.9472 0.9320 1.0000    
Cr 0.986* − 0.8221 − 0.2867 0.6057 0.4740 − 0.8912 − 0.9290 − 0.8485 − 0.6866 0.2000 0.1969 0.1991 − 0.8503 − 0.8405 − 0.970* 1.0000   
Pb 0.9215 − 0.6643 − 0.1174 0.8927 0.8118 − 0.7178 − 0.8123 − 0.6343 − 0.9072 0.1855 0.1799 0.1849 − 0.7612 − 0.7072 − 0.9005 0.8988 1.0000  
pHTempTurb.Coli formFecal formTotal hardnessCa hardnessMg hardnessAlkTSTDSTSeSClNiZnCdCrPb
Drinking water parameters 
pH 1.000                  
Temp − 0.671 1.000                 
Turbidity − 0.020 − 0.020 1.000                
Coliform − 0.897 0.927 0.056 1.000               
Fecal form − 0.652 0.336 0.764 0.567 1.000              
Total hardness 0.988* − 0.749 − 0.116 − 0.943 − 0.704 1.000             
Ca+2 hardness 0.597 0.159 − 0.320 − 0.220 − 0.697 0.530 1.000            
Mg+2 Hardness − 0.021 − 0.704 0.296 − 0.392 0.335 0.067 − 0.811 1.000           
Alkalinity 0.890 − 0.760 − 0.406 − 0.918 − 0.847 0.946 0.475 0.094 1.000          
TS − 0.795 0.964* − 0.185 0.958* 0.308 − 0.835 0.011 − 0.590 − 0.766 1.000         
TDS − 0.793 0.964* − 0.189 0.956* 0.304 − 0.833 0.015 − 0.592 − 0.763 1.000** 1.000        
TSeS − 0.534 0.985* − 0.049 0.848 0.216 − 0.624 0.325 − 0.812 − 0.653 0.919 0.920 1.000       
Chlorides − 0.020 − 0.020 1.000** 0.056 0.764 − 0.116 − 0.320 0.296 − 0.406 − 0.185 − 0.189 − 0.049 1.000      
Ni 0.507 0.052 − 0.714 − 0.261 − 0.911 0.508 0.888 − 0.694 0.606 0.023 0.028 0.191 − 0.714 1.000     
Zn 0.918 − 0.901 − 0.102 − 0.997 − 0.621 0.962* 0.285 0.327 0.942 − 0.935 − 0.933 − 0.813 − 0.102 0.331 1.000    
Cd − 0.352 0.774 0.566 0.668 0.572 − 0.493 0.173 − 0.544 − 0.709 0.598 0.596 0.788 0.566 − 0.199 − 0.662 1.000   
Cr − 0.095 0.595 0.660 0.440 0.479 − 0.248 0.294 − 0.517 − 0.518 0.371 0.370 0.642 0.660 − 0.140 − 0.433 0.962* 1.000  
Pb 0.527 − 0.752 − 0.644 − 0.747 − 0.761 0.651 0.090 0.343 0.850 − 0.617 − 0.614 − 0.722 − 0.644 0.431 0.757 − 0.965 − 0.890 1.000 
Wastewater parameters 
 pH Temp BOD COD TKN Total hardness Ca hardness Mg hardness Alkalinity TS TDS TSeS Chloride Ni Cd Cr Pb  
pH 1.0000                  
Temp − 0.8758 1.0000                 
BOD − 0.3878 0.7808 1.0000                
COD 0.6668 − 0.3852 0.0433 1.0000               
TKN 0.5340 − 0.2255 0.1697 0.985* 1.0000              
Total hardness − 0.9234 0.989* 0.6883 − 0.4060 − 0.2444 1.0000             
Ca+2 hardness − 0.965* 0.972* 0.6138 − 0.5367 − 0.3851 0.989* 1.0000            
Mg+2 hardness − 0.8772 0.987* 0.7350 − 0.2994 − 0.1327 0.993** .965* 1.0000           
Alkalinity − 0.7736 0.6154 0.2569 − 0.954* − 0.8999 0.6103 0.7139 0.5215 1.0000          
TS 0.0567 0.3700 0.8314 0.0909 0.1322 0.2278 0.1738 0.2658 0.1491 1.0000         
TDS 0.0530 0.3719 0.8310 0.0840 0.1253 0.2297 0.1767 0.2669 0.1555 1.000** 1.0000        
TSeS 0.0558 0.3710 0.8321 0.0909 0.1324 0.2288 0.1748 0.2668 0.1493 1.000** 1.000** 1.0000       
Chlorides − 0.9141 0.986* 0.7212 − 0.5313 − 0.3830 0.976* 0.983* 0.955* 0.7377 0.3456 0.3486 0.3465 1.0000      
Ni − 0.8969 0.998** 0.7552 − 0.4436 − 0.2875 0.989* 0.981* 0.979* 0.6640 0.3530 0.3553 0.3540 0.995** 1.0000     
Cd − 0.996** 0.9132 0.4678 − 0.6487 − 0.5107 0.9484 0.983* 0.9071 0.7791 0.0331 0.0367 0.0340 0.9472 0.9320 1.0000    
Cr 0.986* − 0.8221 − 0.2867 0.6057 0.4740 − 0.8912 − 0.9290 − 0.8485 − 0.6866 0.2000 0.1969 0.1991 − 0.8503 − 0.8405 − 0.970* 1.0000   
Pb 0.9215 − 0.6643 − 0.1174 0.8927 0.8118 − 0.7178 − 0.8123 − 0.6343 − 0.9072 0.1855 0.1799 0.1849 − 0.7612 − 0.7072 − 0.9005 0.8988 1.0000  
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