Fe Zn Cu Mn Cd Pb
min 0.116 0.005 0.001 0.027 0.001 0.005
max 0.750 0.060 0.005 0.142 0.003 0.017
mean 0.340 0.24 0.002 0.73 0.001 0.007
±SD 0.24 0.019 0.001 0.045 0.001 0.003
PL

1.0

1.0

1.0

0.05

0.01

0.05

*PL: permissible limits according to USEPA (1986)
Table 2: Mean value of heavy metals concentration (mg/L) in water of RN in Mansoura region according to Elewa 2010.