Evaluation of heavy metals pollution in groundwater, soil and some vegetables irrigated with wastewater in the Skhirat region "Morocco"

0.435, 0.251, 0.286, 0.0017 and 0.062 mg/L. On the other hand, results indicate that there is a substantial buildup of heavy metals concentrations in canal wastewater above FAO and WHO recommendations with respectively mean of 1.32, 0.043, 0.230, 0.70, 0.67, 0.41, 0.01, and 0.093 mg/l. And when soil was analyzed results for most of the elements were observed ordinary value except for Cr, and Pb with respectively average of 276.67, and 107.19 mg/kg. Data Statistical analysis indicated that canal wastewater obtained values were in high significance amount relatively to elements P, K, S, Zn, Cu, Fe, Mn and Ni compared to shallow well. Also sludge was found in high significance concentrations above normal soil. It is noticed that when vegetables were analyzed; Fe, Cu, Zn, Mn, Ni and Cd showed normal value within the prescribed safety limits at all tested samples, with an average of 456.55, 16.41, 40.11, 81.76, 44.61, and 0 mg/kg. While, concentrations of Cr and Pb in all tested samples have crossed the safe limits for the prescribed safety limits with respectively mean of 14.36 and 13.78 mg/kg. Mint and leek registered maximum content of Cr, whereas high amount of Pb in Parsley and cabbage was recorded the highest value for Ni. Thus we expect that consumption of Cd and Pb through vegetables poses substantial health risk to consumers and for this reason perhaps these products are unfit consumption. Therefore, this emphasizes the need for proper method to manage using wastewater to reduce the health risk and the extent of heavy metals contamination.