Survey of Rainwater Quality Modification as Water Supply in Northern Part of Iran

Lack of water supply in recent years is one of the significant problems of both rural and urban societies, as water is one of sustainable development pillars. in societies with high rainfall seasons rainwater is one of the most accessible water resources, which could be utilized as sustainable and reproducible resource of water supply. As rain water contains very low amount of TDS (0-10) MgL−1 there is a need to modify rainwater TDS in order to make it potable. Besides biological effect of low TDS water on body, taste and odour problems always are reported by inhabitant of region. Mixing rainwater with water from other resources with higher TDS is one of the proposed solutions to solve this problem. In the study area samples from rainwater were grabbed and mixed with surface and groundwater after gathering information from inhabitant of region, results indicated that more than 85 percent of inhabitants were displeased of water quality. At first Samples were analyzed to obtain primitive amount of physicochemical parameters and mixed with water from surface and under ground resources in 3 ratio (1/10, 2/10and 3/10) to obtain the best ratio of mixing for providing water with optimum TDS and TH.