In the Yvelines region (78), Eiffage Génie Civil inaugurates the Seine Aval wastewater treatment plant

In the Yvelines region (78), Eiffage Génie Civil inaugurates the Seine Aval wastewater treatment plant

Infrastructures Division

- 21 March 2025 - 14:30

Since 2017, our Eiffage Génie Civil teams have been fully mobilized to design and build the new primary sedimentation unit at the Seine Aval wastewater treatment facility. With construction now complete, it is time for the official inauguration.

Key figures about Seine Aval:

Largest treatment plant in Europe

Treatment capacity: 34 m³/s

Wastewater treated for 6 million residents

We would like to thank SIAAP for their continued trust, as well as all the teams who have successfully managed this large-scale project.

Our gratitude also goes to all the partners who contributed to the success of this exceptional project, led by OTV France, representative of the consortium.

Photo credit: SIAAP – Laurent Blossier