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Background: Provision of safe drinking water is one of the basic needs of every society and it will only be possible through preventive and comprehensive management of drinking water security programs such as HACCP. Hazard Analysis Critical Control Point (HACCP) is an internationally accepted process control system which includes recognition and determination of risk factor properties of processed products and the prediction and implementation of measures to preserve the ideal quality of the product during the production process, from supply to consumption point. This study aimed to design a comprehensive risk management framework, according to the HACCP system, as a method of drinking water quality management in Isfahan. Methods: In this research, the most important risks and risky events affecting water quality of the three sections of raw Zayandehroud River (Isfahan, Iran) water, Baba Sheikh Ali water treatment plant, and Isfahan__AWT_QUOTE__s drinking water distribution system was predicted, identified and analyzed. Practical solutions and measures for the monitoring control, and limitation of the risks in different phases from water supply to consumption point has been presented in the form of seven principles of HACCP system. Required information was obtained through field inspections done in the study area and also through related organizations. Findings and Conclusion: In this research it was concluded that there are various potential hazards caused by sectional changes in water quality during the treatment process due to seasonal changes, discharge of various pollutants especially by rural communities and recreational centers on the bank of Zayandehroud river, natural and sudden accidences, intentional and malicious acts, lack of appropriate leading of processes and a proportionate current treatment process, and the wide extent and antiquity of the Isfahan water distribution system. Conclusion: In order to gain ideal and high-quality drinking water, it is necessary to control discharging of pollutants in the upstream of the water intake with regard to the increasing trend of Zayandehroud river pollution, design an appropriate treatment process in the water treatment plant, and preserve the quality of existing water in the Isfahan water distribution system.

Keywords: Isfahan, Drinking Water, Zayandehroud, HACCP. &, nbsp

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