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Table 8

Pearson's correlation coefficients between trophic state of water (TSI), silica, ortho-P, THMs levels, phytoplankton numbers, and microcystin concentration at the intake and output of Kafr El-Shinawy drinking-water treatment plant – Damietta

TSISilicaOrtho-PChloroformDichlorobromomethaneDibromochloromethaneCyanophyta numberChlorophyta numberBacillariophyta numberIntramicrocystinExtramicrocystin
TSI           
Silica 0.221          
Ortho-P 0.937** 0.356         
Chloroform 0.450* 0.466* 0.704**        
Dichlorobromomethane 0.419* 0.450* 0.689** 0.993**       
Dibromochloromethane 0.423* 0.465* 0.696** 0.981** 0.997**      
Cyanophyta number 0.583** 0.062 0.384 0.003 0.080* 0.107     
Chlorophyta number 0.670** 0.344 0.582** 0.365 0.260* 0.212 0.745**    
Bacillariophyta number 0.017 0.356** 0.194 0.470* 0.454* 0.431* 0.496* 0.209   
Intramicrocystin 0.886** 0.838** 0.393 0.111 −0.097 0.097 0.382 0.259 0.222  
Extramicrocystin 0.551** 0.176 0.768** 0.924** 0.935** 0.942** 0.087 0.303 0.521** 0.504* 
TSISilicaOrtho-PChloroformDichlorobromomethaneDibromochloromethaneCyanophyta numberChlorophyta numberBacillariophyta numberIntramicrocystinExtramicrocystin
TSI           
Silica 0.221          
Ortho-P 0.937** 0.356         
Chloroform 0.450* 0.466* 0.704**        
Dichlorobromomethane 0.419* 0.450* 0.689** 0.993**       
Dibromochloromethane 0.423* 0.465* 0.696** 0.981** 0.997**      
Cyanophyta number 0.583** 0.062 0.384 0.003 0.080* 0.107     
Chlorophyta number 0.670** 0.344 0.582** 0.365 0.260* 0.212 0.745**    
Bacillariophyta number 0.017 0.356** 0.194 0.470* 0.454* 0.431* 0.496* 0.209   
Intramicrocystin 0.886** 0.838** 0.393 0.111 −0.097 0.097 0.382 0.259 0.222  
Extramicrocystin 0.551** 0.176 0.768** 0.924** 0.935** 0.942** 0.087 0.303 0.521** 0.504* 

**Statistically significant correlation at p < 0.01, *Statistically, significant correlation at p < 0.05.

Bold numbers indicate a negative correlation.

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