the economic and social necessity of water reuse in iran

water scarcity in iran has worsened as a result of population growth, increasing pollution, poor water management practices, and climate change. using proper utilization and management of wastewater can provide the ability to cope with pollution threats and take the opportunity to benefit from the new sources of water. in this study, the impact of water scarcity on the production and macroeconomics indicators in iranian economy was analyzed and in the social appraisal, the relationship between the household poverty and the source of drinking water and sewage disposal unit was evaluated. the results show that in the optimistic scenario, the economic losses of water scarcity is estimated 34000 billion rials. as a result, an investment in the water efficiency improving programs and water reuse projects is a beneficial strategy for coping with economic losses of water shortages. furthermore, poverty is more prevalent in the households with no access to public water supply network and sewage collection and disposal unit systems. according to the current methods of sewage disposal in iran, reuse of wastewater and controlling water and soil pollutions is inevitable.