The facilities related to the industrial and sanitary wastewater treatment system, collection and recycling of surface water have been built at the lowest elevation level located in the northeast of the Complex. These sections include: sanitary wastewater treatment unit, industrial wastewater treatment and rainwater recycling. Sanitary wastewater after treatment and its quality to the permitted standards, is used to irrigate green space. Collected industrial wastewater and rainwater after treatment and after reaching the defined standards are used as compensatory water in the production process. Except for a part of the accumulated rainwater (in case of very heavy rains), no sewage, both sanitary and industrial, will be discharged from the complex and all produced sewage will be reused.