Oman Water & Wastewater Services Company (Nama Water Services) has awarded a $2.28bn contract to a consortium led by French utility firm Suez to operate and maintain water and wastewater services in parts of the sultanate.

In a statement, the operator said the 15-year performance-based contract covers Muscat and the North Sharqiyah and South Sharqiyah governorates, known as Cluster 1. The area is home to approximately 2.3 million people, representing about 43% of Oman’s population.

The consortium also includes local firms National Trading Company and National Energy Centre, a local utility development and infrastructure company. It will deliver the contract through a dedicated company, National Sustainable Water Alliance.

According to Suez, the contract is the company’s largest ever in the Middle East.

The scope includes the operation and maintenance of 240 wells and 10,700 kilometres of water pipelines that distribute 470,000 cubic metres a day (cm/d) of drinking water. It also covers the refurbishment and upgrading of four desalination plants and the operation of more than 400,000 smart water meters.

The wastewater package includes the operation and maintenance of 22 wastewater treatment plants with a combined treatment capacity of 280,000 cm/d. It also covers about 3,000km of sewer networks, 400km of treated effluent networks, and the installation and operation of new wastewater house connections.

The contract includes 33 key performance indicators that will determine the consortium’s remuneration. These include reducing water losses from 34% to 11% by 2040, maintaining a continuous 24-hour water supply and improving preventive maintenance to extend the lifespan of water assets.

The contract also includes a capacity-building programme to develop operational and management skills. Suez said the project will target more than 83% Omanisation in support of the government’s Vision 2040 objectives.

Under the agreement, Nama Water Services will retain responsibility for strategic oversight and regulation, while the consortium will manage day-to-day operations.