Estimation of Economic Value of the Use of Wastewater in Agricultural Sector in South of Tehran province

Appropriate use of non-conventional water resources such as surface runoff and sewage produced an issue that has emerged as a necessity particularly on Iran. This thread is specifically in Tehran. This study analysis the economic value of sewage in Agricultural Sector in South of Tehran with production approach In the contaminated area and a clean area. The results show that the average yield of wheat production among the farmers from polluted water is 376kg per hectare more than farmers who use clean water and the economic value of water is 110 Rials more than farmers who use clean water. According these results, the total value of wastewater in Tehran in 1405 would be equivalent to 335,480 million Rials. Prioritize the interests of irrigation with wastewater from an agricultural perspective suggests that availability and reliability of wastewater than other water sources and low cost of its use is the most important benefit. The next priority result of irrigation with wastewater is increasing crop yield and improving soil fertility. This explains why farmers despite the legal prohibition of the use of untreated sewage continue to utilize this source of irrigation water.