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Doha West Sewage Treatment Works


Doha West Sewerage Treatment Works

It is a state of the art plant using modern processes such as Ultra-Filtration. The effluent quality exceeds all common international standards and is used, among other uses, to irrigate local farms.

Involved since 2008 in phase 3 of the expansion works, Gulf Contracting Co. (GCC) completed all civil construction, buildings and MEP works.  Additionally, GCC completed the external works, an extensive refurbishment of the existing plant and constructed two storage lagoons.

Because of our continued success and excellent communication and delivery, the client has asked GCC to manage a further expansion to increase the capacity to 170,000 m3 per day.


  • 17 independent water retaining structures, using 40,000 m3 of structural concrete
  • Process buildings, including air blower rooms, substations, pump rooms, etc.
  • Administration and accommodation buildings
  • 1.2 km of concrete dam and earthen bund to form the lagoons, which holds 5 million m3 of effluent
  • 12 km of trench work
  • 17km of perimeter fencing.

Project vitals


Al Wakra, Qatar


Public Works Authority (Ashgal)


Nippon Koei


QR 275 million


February 2008 to December 2010

Doha West Sewage Treatment Works is designed to treat a daily flow of 135,000 m3 per day or a population equivalent of 500,000 people.