Dammam Sea Outfall STP (Secondary & Tertiary) - Al Khobar, Eastern Province, Saudi Arabia

The Dammam Sea Outfall STP (Secondary & Tertiary) is a wastewater treatment facility located in Al Khobar, Eastern Province, Saudi Arabia. It serves the urban and industrial areas of the Dammam metropolitan region, a major population and economic hub on the Arabian Gulf coast. The plant is part of the country's extensive water management network, addressing the needs of a rapidly growing population. The plant's name indicates it provides secondary and tertiary treatment, which is typical for facilities discharging into sensitive coastal environments. In Saudi Arabia, wastewater treatment standards are governed by the Ministry of Environment, Water and Agriculture, with requirements for advanced treatment to protect marine ecosystems and enable water reuse. The treated effluent is discharged into the Arabian Gulf via a sea outfall, impacting the coastal waters of the Gulf. This region supports diverse marine life, including coral reefs and fisheries, and is ecologically sensitive due to high salinity and limited water exchange. The plant's advanced treatment helps mitigate nutrient loading and protect the Gulf's water quality.

The plant discharges treated wastewater into the Arabian Gulf, a semi-enclosed sea with limited circulation and high evaporation rates. The Gulf supports critical marine habitats, including coral reefs, seagrass beds, and mangrove forests, which are sensitive to nutrient pollution and thermal changes. The Eastern Province coastline is also an important area for fisheries and desalination plants, making effluent quality management crucial for both ecological and human water security.