Fe Zn Cu Mn Cd Pb
min 0.72 0.32 0.36 0.28 0.01 0.012
max 1.98 0.66 0.68 0.84 0.09 0.22
mean 1.416 0.464 0.513 0.513 0.044 0.099
±SD ±0.08 ±0.02 ±0.02 ±0.03 ±0.005 ±0.012
PL

1.0

1.0

1.0

0.05

0.01

0.05

*PL: permissible limits according to USEPA (1986)
Table 1: Mean value of heavy metals concentration (mg/L) in water of Lake Manzala. According to the measurement of Saeed and Shaker (2008).