Non-conventional water (NCW) is water that comes from a source that is not normally used for agriculture and is primarily of lower quality. Wastewater treatment and reuse in agriculture is a good example of this source. The two main sources of non-conventional water are: Wastewater from domestic, urban and industrial uses Saline water obtained from groundwater, drainage and surface sources Water that can be supplied from these sources is placed in a range of quality and quantity. Regarding wastewater, the lowest quality is undiluted wastewater and the highest quality is water obtained from four-stage treatment. Regarding salty water, sea water and very salty underground water with an electrical conductivity of more than 25 microsiemens/cm have the lowest quality, and water with an electrical conductivity of less than 4 microsiemens/cm and desalinated water have the highest quality. This water with the highest quality for irrigating valuable agricultural crops or in areas with severe water shortages where there is access to sufficient financial resources; is used Safe use of non-conventional water (NCW) requires that human health is not affected and environmental quality is maintained at an acceptable level in the short and long term. The economic feasibility of using NCW in agriculture depends on many factors: treatment cost to achieve a safe quality, pumping cost, distribution costs and competitive costs of using this water in alternative solutions such as landscaping and amenities. Currently, in some areas, due to the lack of access to safer and cleaner water sources, wastewater is considered a conventional water source. While in many countries, NCW is becoming the main source of water for agriculture as a conventional source of water. NCW can be used alone or in combination with other water sources to achieve the desired quality and quantity. Regarding the use of untreated and diluted sewage, safety measures should be adopted and implemented according to WHO-FAO-UNEP guidelines. Increased use of NCW will primarily benefit peri-urban areas and countries where conventional renewable water resources are limited or demand for water exceeds supply. Wastewater treatment and reuse in agriculture Cities and towns produce a stream of water that has already been used for domestic purposes. This stream is wastewater that must either be safely disposed of or reused downstream. Apart from its value as water, this flow may contain nutrients and useful for agricultural production. However, there may be a mismatch between its production (which is relatively constant) and the agricultural sector’s demand (which varies based on the location requiring irrigation and the time of year). The best way to use this water is to water agricultural products in areas near cities. In order to use this water, it is necessary to pay attention to the following points: Production Availability in the future Reuse and safety instructions Current status of water reuse Governance/Policies/Laws/Monitoring and Agreements Storage equipment Long distance transportation networks and pumping requirements Use of salt water in agriculture If the environmental conditions are favorable; Using salt water to produce agricultural products that tolerate salt water; It can create economic value. To prevent salt accumulation, additional water should be used in the aerated area. It should also be noted that this process should not destroy the environment or resources. Regardless of the source from which the NCW is obtained; Its use should be part of a comprehensive approach to water resources management, which includes demand management and supply strategies and protection of water resources. The economic use of NCW compared to other sources, and the development of its implementation and capacity building strategy, are critical; Because the proper management of this water source is necessary for its safe use in agriculture. Aquaria ultrafiltration modules can be used in the production processes of both non-conventional water sources.