Abstract:The contamination of groundwater has major complications on the environment and can pose serious threat to agriculture and human health. However metals like magnesium, calcium, iron and manganese are necessary to sustain the vital plants function in trace amounts. Therefore World Health Organization has approved the treatment of water if concentrations of iron is higher than 0.3mg/L The aim of this research is to investigate the relationships between concentration of iron and the levels PH of ground water. Thirty five samples were collected from different 10 wells Groundwater in Zulfi Town, two samples from treated water. Water from the ground water is used extensively in Zulfi province for urban and rural water supply, agriculture, and industry. In all well the concentrations of iron was found to be higher than 0.3mg/L, and pH is greater than 7 except in in three wells. So we expect iron bacteria growth.