Nematollah Dayyani - lecturer of Payam Noor University, Qom, Iran.

There are many trends in making an ecological city all around the word, one of important cases in this approach is safe and health water. According by definitions, safe and potable water is water needed for conducting the activities of man. Potable water is the most important renewable sources and this resourceplays important role for survival of most living organisms as well as man based on supplying the water requirements and irrigation water. By development of urbanization, today, the subject of sources management in the civil areas has been remarkably considered and this paper has been written by that vision. Progress in the urban living made irretrievable damages to the nature and treated many naturalsources. One of the most important of these factors includes water pollution and its sources. Water safety, and preventing its pollution and its lost is one of the most important issues in our era, Water contamination is considered as a great environmental complication encountered with due to day-to-dayprogress of industries and technology. This paper aims to investigate the existing concepts, factors making the contaminations ,alternatives such as managerial methods, existing challenges, and recommendations in the field of preventing and reducing the contamination of water sources and using safe water .

Ecological city, safe water, waters contamination, challenges and alternatives, potable water,urban environment