Recycling 100% of the wastewater in Doha, Qatar, to support its international development

Water requirements in Doha are continously growing and the capital has very low rainfall levels. From 2005, the Qatar National Public Works Authority (Ashghal), signed three successive contracts with SUEZ to cope with the demographic pressure coupled with hydric stress. The challenge: satisfy water needs and protect the resource. With this aim in mind, SUEZ set up future-proof infrastructures and innovative treatments to achieve up to 100% wastewater recycling.
The mission

Support Doha's demographic and international growth while securing its water resources

Water resource management has become a critical issue for Qatar. Tucked between the sea and the desert, this small kingdom is subject to high demographic and climate stress with scarce, minimal rainfall. The city of Doha in particular, which houses 80% of the country's population, must meet ever-increasing water requirements.
The needs of inhabitants of the urban area exceeded plant capacity. Facilities had to handle volumes superior to initial requirements and still maintain the quality of recycled water.


In 2005 and within the framework of three successive contracts, the Qatar state public works authority (Ashghal), responsible for the capital city’s wastewater system, called on SUEZ to meet its resource protection goals and support Doha’s demographic and international growth.


Ashghal planned and contracted a phased extension of Doha West wastewater treatment plant, according to a Design Build and Operate procurement model. The original capacity of Doha West wastewater treatment plant was 70,000 m3/day.

These missions were in part conducted in partnership with Japanese firm Marubeni Corporation. 



Daily quantity of water consumed per inhabitant in Qatar

Our solution

Protect resources by recycling wastewater

The SUEZ solution? Propose efficient and scalable infrastructures to protect the water resources while meeting the growing needs of the capital. We built a new wastewater treatment and recycling plant on the Doha West site; and extend the facility capacity to meet the needs of Doha.
Scalable solutions to increase the water treatment capacity
In 2005, the city of Doha signed an agreement with SUEZ for the design, build and operation of a new wastewater treatment and recycling plant located west of Doha. The new plant, which has a production capacity of 135,000 m3 a day, came into operation in March 2010 supplementing the production of the existing plant on the Doha West site.
The following year, State authority Ashghal entrusted SUEZ with the extension of the Doha West wastewater plant, as the needs of the population already exceeded the capacity of the plant. The aim was to raise capacity from 135,000 to 175,000 m3 of wastewater treated per day using the same technology.  The extension was brought online in July 2012, three months ahead of schedule. 
Ensure sufficient water supply for the FIFA 2022 world cup infrastructures
In 2015, SUEZ was again assigned to extend the Doha West wastewater treatment and recycling plant by 2017. This time, the intended capacity amounted to 280,000 m3 per day. The same year, the management authority of the Aspire Zone contracted SUEZ to design and build a post-treatment plant. The aim was to reuse part of the wastewater recycled by the Doha West site for the needs of the 250-hectare sports complex, including the FIFA 2022 world cup stadium. Using innovative technology, we have adjusted the quality of recycled water to the specific requirements of the Aspire Zone and guaranteed plant performance in terms of quantity.
Increase the volumes of water available without reducing natural resources
Through advanced technologies, such as ultrafiltration membranes, the Doha West plant can reuse 100% of treated wastewater. The wastewater is reused for agriculture in the desert (55%), gardens (42%), and recharging aquifers (3%).


extra inhabitants served by the Doha West plant under the second 2011 contract

The results

Innovative treatments to preserve water resources in Doha by recycling treated wastewater to save drinking water and recharge aquifers.

By using this additional treated wastewater, which is of very high quality and contains nutrients, crop growers have produced better yields and reduced their use of artificial fertilisers.

Daily production capacity of the reuse plant dedicated to the Aspire Zone. 
of treated wastewater is reused for irrigation and aquifers recharge