Water Shortage in Iran and other arid areas, and also excessive population growth and increase of environmental pollution have faced human life with some difficulties. In order to solve these problems and water shortage, it is essential for human to use unconventional resources. One of these solutions is to use wastewater and unconventional waters. Unconventional waters should be used in such a way that causes minimal adverse effects on the environment, that’s why we apply water treatment and recycling. Nanotechnology is a technology that has many applications in unconventional water treatment. In this research, in addition to use nanotechnology for unconventional water treatment, scheme of mixing several kinds of unconventional waters for reuse in industry, agriculture and significant landscape have been proposed so that the sea water, treated water using nanofiltration (NF) and also effluent biological systems have been used. Tested parameters include Temperature, H, TDS, EC, BOD, COD, nitrate, phosphate and sulfate. The purpose of this research is to find the best mixture for various applications. Determining the best type of mixture by reducing the tested parameters and also analyzing whether up to 5% difference in results of mixing schemes makes sense have been done. In this scheme a designed pilot has been used in which different types of filters were used (nanofilters is an example). Also detecting the optimal mixture scheme with sea water, urber water and biological system wastewater is another innovative aspect of this research.the Results of 9 mixture schemes suggest that the best mixture scheme is mixing of 80% drinking water, 10% raw sewage and 10% NF effluent where the parameters pH, T, EC, TDS, COD, BOD, and which are of the important parameters in the industry are considered in the National and International standards scope and are suitable for all applications, including agriculture and industry. For the industrial uses, the best mixture is 80% drinking water, 10% raw sewage, and 10% NF effluent, in which , thatis considered as an important factor in industry, has the lowest possible percentage. But the 80% mixture of drinking water, 10% raw sewage, and 10% biological effluent is also recommended for the industrial use which covers theational and international standards. Key words: wastewater, unconventional water, Biological system, Nanofilter, sea water.