Oman Water & Wastewater Services Company S.A.O.C. is a subsidiary of the Electricity Holding Company S.A.O.C. operating under the trade name of Nama Water Services. Established on 21 June 2003, the Company was granted concession rights, by virtue of Royal Decree No. 69/2005, to operate and manage the wastewater sector in the Governorate of Muscat. In 2014, the Company was mandated, by the Government of the Sultanate of Oman, to operate and manage the wastewater sector in all of the Sultanate of Oman except for Dhofar Governorate.

Through an ambitious vision and well-established values, the company seeks to be a leading service institution in the water and wastewater sectors and applies best international practices to contribute to achieving the sustainable development of the Sultanate.