Nama Water Services (NWS), the main operator of water and wastewater services across the Sultanate of Oman, excluding Dhofar, has announced a long-term investment plan with a total estimated value of RO 11.1 billion (approximately USD 28.8 billion) through to 2050, reports Oman Observer. The plan is intended to support future water security and infrastructure needs in line with Oman Vision 2040, as the country’s population is expected to grow significantly over the coming decades.
The investment framework is outlined in NWS’s Integrated Master Plan (IMP), which targets expanded water supply coverage and increased wastewater treatment capacity across its service area. NWS currently provides services to more than 90% of Oman’s population. Details of the plan were presented by Eng Abdulhakeem bin Amur al Dhuhli, Master Planning and Strategic Investments Manager at Nama Water Services, during the Water Majlis 2025, organised by the Oman-German Friendship Association in collaboration with NWS.
As part of the near-term implementation, NWS has allocated RO 666 million for its 2025–2027 capital expenditure programme. Of this amount, RO 453.3 million is designated for water-related projects, while RO 212.7 million is earmarked for wastewater infrastructure. The three-year programme includes more than 225 projects, comprising over 113 water projects and more than 112 wastewater projects.
The investment strategy follows a structured planning approach that assesses projected water demand and wastewater generation alongside infrastructure requirements. The plan also allows for the inclusion of Public-Private Partnership (PPP) options as part of project delivery.
The investment strategy follows a structured planning approach that assesses projected water demand and wastewater generation alongside infrastructure requirements
Under the 2025–2027 programme, the water network is expected to expand by more than 8,000 kilometres, alongside the construction of 202 new reservoirs with a combined storage capacity exceeding 1.8 million cubic metres and 90 pumping stations. These developments are expected to support the connection of more than 162,000 new water customers. In parallel, the wastewater programme includes the construction of 28 new sewage treatment plants of varying capacities and more than 1,500 kilometres of new sewerage networks, serving over 42,000 additional customers.
Looking further ahead, the Integrated Master Plan extends to 2050 and is designed to accommodate population growth projected to reach approximately 9.2 million. The full plan includes 410 projects, with the largest share of long-term investment—RO 7.2 billion—allocated to wastewater infrastructure. Water projects account for RO 2.0 billion, while integrated water and wastewater initiatives represent RO 1.8 billion of the total planned expenditure.
By 2050, the plan anticipates supporting around 1.75 million water connections, expanding the water distribution network to approximately 30,000 kilometres, and developing a wastewater system comprising 151 sewage treatment plants and around 30,000 kilometres of sewerage lines.
The plan sets targets for service coverage that align with Oman Vision 2040 benchmarks. Water supply coverage is projected to increase from 72.5% to approximately 96% by 2040, while wastewater coverage is targeted to rise from 29.2% to 75% over the same period.
The Integrated Master Plan also emphasizes the use of treated effluent as a non-conventional water resource, with utilisation targeted to increase from 50% to 71%. In addition, the plan includes provisions to raise water production capacity from Independent Water Producers to 932 million cubic metres per year and to expand storage capacity to 6.6 million cubic metres by 2050.
Through this long-term investment programme, Nama Water Services aims to address future infrastructure requirements and support the sustainable management of water and wastewater services across the Sultanate of Oman.
