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Sewage treatment plants in Saudi Arabia run from city-scale independent plants of 90,000 to 200,000 cubic metres a day to packaged units for camps, schools and compounds. This page lists Saudi suppliers and explains plant sizes, approvals, climate design, aeration and pumps, sludge drying at Riyadh and what drives price and lead time.
Jubail is a desalination and industrial water city. Zawya reports that the Jubail 3A project, a seawater reverse osmosis plant about 18 km south of the industrial city, was targeting commercial operation in the fourth quarter, with investment of USD 650 million and a 25 year water purchase agreement. Other desalination projects have been tendered by the Saudi Water Partnership Company for the same coast. For water and environmental services buyers, that means steady demand for desalination plants components, reverse osmosis systems, pumping stations and pipeline materials.
Petrochemical plants need demineralised water, cooling water and effluent treatment. Demineralization plants, industrial effluent treatment, sludge dewatering equipment and stack emission monitoring are routine purchases. Utilities for the industrial city are provided on the Royal Commission side, so check with the plot's utility provider what quality and pressure will be supplied before you size equipment.
Treatment contractors and chemical suppliers work from Jubail Industrial City and Dammam. Membranes, pumps and dosing skids typically arrive through the Jubail ports or by road. Questions worth asking any supplier:
Environmental permits for emissions and discharge are regulated, so confirm the current rule with the relevant Saudi environmental authority and the Royal Commission before design is fixed. Use post a requirement to compare proposals.
Smaller sites also need water tanks, filters, softeners and meters for camps, workshops and offices. Waste contractors collect hazardous and general waste from plants, and licensing of the carrier and the disposal site matters, so request transfer records for every load.
Jubail is a planned industrial city before it is a town. The Royal Commission for Jubail and Yanbu, created in 1975, develops and runs Jubail Industrial City on the Arabian Gulf coast of the Eastern Province. Saudipedia names SABIC as the main owner of the industrial complexes and says 13 of its 16 Saudi production plants stand here, alongside Saudi Aramco Total Refining and Petrochemical Company (SATORP), Advanced Petrochemical Company and Jubail United Petrochemical Company. The older estate is often called Jubail 1. Jubail 2, whose foundation stone was laid in 2004, was planned in stages, with about a quarter of its area reserved for industry and a primary zone for chemicals such as methanol, ethylene oxide and ammonia, according to a 2018 trade report.
The Commission reported that investment across its industrial cities passed SAR 1.5 trillion (about USD 400 billion) by the end of 2025, and Saudipedia says it has set aside SAR 67.5 billion to double the city's area by 2030. Smaller fabricators, workshops and service firms cluster around the main plants, because the big complexes buy maintenance and contract labour continuously.
The Port of Jubail is two harbours under Mawani, the Saudi Ports Authority. King Fahd Industrial Port, opened to serve the industrial city, handles bulk and plant cargo, and Jubail Commercial Port handles general, container and bulk cargo. Saudi Global Ports, a PIF and PSA International venture, holds a build-operate-transfer contract for multipurpose terminals at four Eastern Province ports including both Jubail harbours. In December 2025 Mawani announced a land lease of more than SAR 500 million to a chemical terminal operator for 70,000 cubic metres of chemical storage at Jubail Commercial Port. Dammam is about 100 km south by road, and trucks and rail carry cargo on to Riyadh.
Inside the industrial city, the Royal Commission allocates land, supplies infrastructure and approves investors. Power, water and seawater cooling come from Marafiq, the utility for Jubail and Yanbu. Fire and life safety approvals come from the General Directorate of Civil Defense, medical products need the Saudi Food and Drug Authority, and customs entries are handled by ZATCA. Confirm the current steps with each body before signing.
Petrochemicals, refining and chemicals buy pumps, valves, instruments, coatings, gases and maintenance services on shutdown calendars. Utilities and the port buy electrical and marine equipment. Construction and housing demand follows the expansion programme.
