Based on the proposal of Ministry of Energy, the Association of specialized holding company of National Water and Wastewater Engineering Company was approved by Iran's Management and Planning Organization and Ministry of Economic and Finance Affairs.

The main purpose of establishing the concerned company is to organize the official activities of Ministry of Energy in water & wastewater affairs including the correct management, supervision and evaluate the performance, guidance and governance, increase the efficiency and operation and the optimal use of resources of subsidiaries companies in the policies of Ministry of Energy and also choosing the Ministry of Energy to do the supervision and compile the programs.

The status of the established water and wastewater companies is as follows right now: 34 urban water and wastewater companies and 30 rural water and wastewater companies.

And also based on the approval in the part of cabinets, all the concerned affairs of rural water and wastewater companies were delivered to the National Water & Wastewater Engineering Company and according to the above mentioned approval, all the authorities of Ministry of Agriculture has been delivered to Ministry of Energy as follows ; in the subject of making policy, planning, establishing, reconstructing, developing, keeping installations and rural potable water networks and as well as healthy discarding of rural wastewater