Anas S Dablol, Saleh AlGarni, Hussain AlMehdar, Khaled M.Ghanem, Mohammed A Alawad
well water is essential source of water in Makkah which is used for different purposes. This study was carried out to assess physical and biological characteristics of well water inside and outside Holly Makkah. Water samples were collected from all wells and examined according to Saudi Arabia standard (407/1989). The results were compared to Saudi Arabia Guidelines. Coliforms were detected in all wells, while E.coli and fungi were found in the majority of wells. Taste and MPN were exceeded the standards of Saudi Arabia in a considerable number of wells. Improvement of water treatment process is extremely needed.