Lead is one of the metals considered as a major threat to human health. This heavy metal is characterized by its toxic effects on the gastrointestinal tract, renal system and central or peripheral nervous system [1]. The main sources of lead in humans are inhaled air, diet and drinking water [2]. Lead could be present in water due to general environmental contamination. Polluting sources are quite varied, ranging from industrial and traffic emissions to the use of purification mud and agricultural excipients[3]. The World Health Organization (WHO) has established a maximum permissible limit of 10 g L−1 Pb in drinking water [4]. Therefore, evaluation of Pb at levels close to this limit and in presence of relatively high amounts of other ions and organic matter makes straight determination of Pb a difficult task for quality control of waters