The project of studies on the separation of urban drinking water from the green space water of Khosf city was carried out with the aim of optimizing water consumption and maintaining quality drinking water resources for human use. In this project, due to the dry climate and the lack of water resources in the region, the need to separate the water sources used for irrigation of green spaces from drinking water was identified. Initial studies focused on available resources, water needs of green spaces, and water consumption patterns in Khosuf city. These studies helped identify suitable non-potable water sources, such as surface water, treated wastewater, and recycled water for use in green spaces. In this project, practical solutions were proposed to create an effective separation system, which included the design of separate transmission lines, wastewater treatment and reuse systems, and the use of new water management technologies. These measures have helped to reduce the pressure on drinking water resources and increase the efficiency of water consumption in the green space, and at the same time, it has also led to maintaining and improving the quality of the urban green space. With the implementation of this plan, Khosef city has taken an effective step towards sustainable management of water resources and reducing the wastage of drinking water.