Abstarct: The nitrate ion is the most important surface water and groundwater contaminants that cause diseases such as Met Hemoglobin and digestive system cancers. By having widespread active surface and taking strong electron, Zero-Nano Iron (Fe0) has used as a non-toxic nitrate contaminants from water. In the research we studied Nitrate Removal Process Using Zero-Nano Iron is dependent on environmental conditions (conducted in 2013-2014), The Effects of Humic Acid on Nitrate Removal Process Using Zero-Nano Iron in glass and experimental conditions as factorial in form of randomized complete design with three replications. Factors examined included various concentrations of humic acid (0,0/25,0/75 milligrams per liter), concentrations of Zero-Nano Iron (1-1/5-2 mg per liter) and different levels of pH (3, 4 and 5) and then it was evaluated changes of Nitrate content in a solution containing 30 milligrams per liter ammonium, nitrite and iron (II) due to corrosion after 48. Results of the study show that due to high special surface, Zero-Nano Iron has high capacity to revive Nitrate and its removal from water sources and presence of Humic Acid in term of increasing nanoparticles, lead to reduce Nitrate removal and increasing primary solution pH lead to reduce restoration efficiency of Nitrate and Nitrate restoration process has products which nitrite considered as unstable median product and its results have not consistence with Nitrate and ammonim and due to mass effect, ammonim concentrations has inverse relationship with Nitrate restoration efficiency of Nitrate Using Zero-Nano Iron.