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Water treatment in Saudi Arabia covers desalination, reverse osmosis, filtration, softening, demineralisation, deionisation and UV disinfection, from utility plants on the Gulf and Red Sea to skids in factories and camps. This page lists Saudi water treatment companies and explains Saudi Water Authority licensing, SWPC independent water plants, treating seawater and inland groundwater, and what drives cost.
Largely from the sea. Desalination plants on the Red Sea coast near Yanbu feed a transmission pipeline that carries water inland to Madinah, and confirming current supply arrangements with the National Water Company is sensible before sizing storage. This is the base of the city's water and environmental services market, from treatment and storage to meters and leak work.
The Madinah 3 wastewater plant was developed by an international water developer for the Saudi Water Partnership Company at a reported cost of US$257 million, with initial capacity of 200,000 cubic metres a day, expandable, and 23 km of recycled water collectors. Treated water goes mostly to irrigation and industrial use. In July 2025 the National Water Company reported starting 23 water and environmental projects in Madinah worth over SAR 814 million, including sewage network extension.
Utilities and contractors buy water pipeline materials, water pumping stations, water tanks and reservoirs and water meters. Factories and hotels need water filtration systems, reverse osmosis systems, industrial effluent treatment and grease traps and interceptors. Food plants in the industrial city are the main source of effluent that needs pre-treatment.
Check discharge and reuse limits with the National Water Company and the environmental authority before sizing a plant. Ask for pilot or reference data, membrane and spare part supply in the region, and service response time. Reuse of treated water is relevant to landscaping, so state your quality target. Compare suppliers through post a requirement.
For industrial reuse, ask what the treated-water quality is at the delivery point, since the Madinah 3 plant sends most of its output to irrigation. Madinah summers raise demand sharply, so size storage and pumping for peak days, not averages. Ask for energy use per cubic metre when comparing treatment plants.
Madinah is first a city of pilgrimage and visitors, so its industry is concentrated in a planned estate rather than spread through the city. That estate is Madinah Industrial City, run by MODON, the Saudi Authority for Industrial Cities and Technology Zones. Dar Al Riyadh lists a MODON project of 28 ready-built factories there, with works dated 2022 to 2024, covering the buildings plus roads, water supply, firefighting and sewage networks. MODON also said in 2024 that two industrial cities in Madinah were among the most attractive in the Kingdom for food and beverage manufacturing in 2023. Inside the city, the other large building sites are tied to hospitality. Knowledge Economic City, in its Islamic World District, is a 6.8 million square metre development, and Marriott announced three hotels there in December 2024. Rua Al Madinah, east of the Prophet's Mosque, was announced in August 2022 on 1.5 million square metres with a target of 47,000 new hotel rooms by 2030.
Madinah has no seaport of its own. Sea cargo normally comes in through the Red Sea at Yanbu, the nearest industrial port, and then moves by truck. In December 2025 Mawani signed a contract with a logistics operator for an integrated logistics centre of 120,490 square metres at Yanbu Commercial Port, worth over SAR 29 million. Prince Mohammad bin Abdulaziz International Airport handles passengers and some goods; in 2023 Arab News reported date-shipment permits issued through it. Argaam reported in 2018 that the airport reached 12 million passengers a year of capacity after a second phase in 2014, with a third phase aimed at 16 million by 2037. The Haramain high-speed railway links Madinah with Jeddah and Makkah, and Knowledge Economic City plans a connection to its station. The line is passenger rail, so freight still travels by road.
MODON handles factory land and ready units in the industrial city. Building permits come through the Madinah municipality, fire and life safety approvals through the General Directorate of Civil Defense, and electricity connections through Saudi Electricity Company. The Prophet's Mosque cooling plant is operated by the General Authority for the Care of the Affairs of the Prophet's Mosque. Medical products need approval from the Saudi Food and Drug Authority. Confirm each current step on the authority's own platform.
Hospitality, facilities and cooling lead demand because of the visitor economy. Healthcare follows, with King Salman Medical City of 1,246 beds. Date packers and food plants buy processing and packaging machinery, and farms supply a date crop that Arab News counted at 8.3 million palms in the province in 2023. Heavy oil, gas and petrochemical demand sits mainly at Yanbu and in the Eastern Province.
