Food & Nutrition

Arab Journal of Food & Nutrition
The average pH of all samples (7.4) was in compliance with JS 286:1997. The
averages of the inorganic nonmetallic constituents (N03, N02 and NH4) and the heavy
metals (Fe, Zn and Al) for all samples were also in compliance with JS 286:1997. The
concentration of iron was higher in some samples from municipal water than those
from storage tanks in both areas that are supplied from Zai Plant and Yajouz Station.
The percentage of samples that had iron concentration >0.3 mg/L that is recommended
by JS 286:1997 was higher in municipal water (18.4%) than those from storage tanks
(4.9%).
The majority of municipal water samples originating from both stations
contained free residual chlorine which was within the range (0.2-1.0 mg/L) specified
in JS 286:1997; few samples were outside this range 16 (13.0%). However, higher
number of tank water samples contained residual chlorine in concentrations