ABSTRACT
Ammonia (NH3) occurs in varying concentrations in groundwater, surface water, and wastewater. Its occurrence in waters and sludge is primarily attributed to its formation resulting from the reduction of nitrogen-containing organics, deamination of amines, and hydrolysis of urea, and also to its use in water treatment plants for dechlorination. Its concentration in groundwaters is relatively low because of its adsorption to soil.
