Tubli Water Pollution Control Centre - Major Wastewater Treatment in Bahrain

Tubli Water Pollution Control Centre is a major wastewater treatment facility located in Tubli, approximately 10 km south-west of Manama, in the Capital Governorate of Bahrain. It serves a population of 1,400,000, making it one of the largest treatment plants in the country, and is operated by the Ministry of Works (Sanitary Engineering Affairs) under the oversight of the Supreme Council for Environment. The plant employs activated sludge treatment with tertiary polishing, achieving secondary treatment standards. It has a designed capacity of 200,000 m³/day and currently operates at full capacity, treating the same volume daily. As a large agglomeration, it aligns with the requirements of Bahrain's environmental regulations, which mandate advanced treatment for facilities of this scale to protect sensitive coastal waters. The treated effluent is partially reused for landscape irrigation, supporting water conservation in this arid region, while the remainder is discharged into Tubli Bay, a shallow coastal embayment connected to the Arabian Gulf. The plant plays a critical role in safeguarding marine ecosystems in the Gulf, which support diverse aquatic life and are important for regional fisheries and biodiversity.

Tubli Bay is a coastal water body on the eastern coast of Bahrain, connected to the Arabian Gulf. The Gulf is a semi-enclosed sea with high salinity and limited water exchange, making it sensitive to nutrient pollution. The plant's discharge and reuse program help mitigate eutrophication risks in the bay, which supports seagrass beds, coral reefs, and migratory bird populations. Downstream, the Arabian Gulf drains into the Gulf of Oman and ultimately the Indian Ocean, linking local water quality to broader marine health.