Wastewater system consists of network and treatment plants for sanitary and industrial wastewater separately.

Wastewater Network
The total network length is approximately 1,108 km for sanitary and industrial wastewater system. All wastewater from Jubail Industrial City are collected through a pipeline network into 280 lift stations and 58 pump stations located in community and industrial areas. Marafiq also receives sanitary wastewater from the Jubail town. The critical pump stations and lift stations are equipped with Odor Control Units (OCU’s). The wastewater is then delivered to the two respective treatment plants. There are two kinds of wastewater treatment plants in Jubail Industrial City.

  • Industrial Wastewater Treatment Plant (IWTP8) 
  • Sanitary Wastewater Treatment Plant (SWTP9)

Both plant use preliminary, secondary and biological treatment processes with filtration and disinfection. Stage-3 of IWTP-8 is equipped with advance treatment through Fenton and GAC in order to comply with the latest regulation from the Royal Commission. 

The Industrial Wastewater Treatment Plant is designed to treat incoming industrial wastewater from industries in the Jubail Industrial City. It has a design capacity of 120,000 cubic meters per day.

The Sanitary Wastewater Treatment Plant is designed to treat incoming sanitary wastewater from industries, community area and Jubail town. It has a design capacity of 159,000 cubic meters per day.

Treated Water
The treated effluent from both the plants is being utilized for landscape irrigation mainly by Royal Commission. The standard of irrigation water is maintained as per Royal Commission Environmental Regulation (RCER).