Grand Paris Sud Essonne Sénart - réduire les pertes d'eau et construire un plan pluriannuel d'investissement

Towards autonomous and efficient water management

After more than twenty years under delegation, Grand Paris Sud chose to take back control of its water network management by creating its own utility.
Established in 2013 with an initial perimeter of six municipalities, it has gradually expanded to cover 23 municipalities and 361,000 residents, overseeing nearly 1,300 km of pipelines.

Meeting the challenge of a utility in full reconstruction

This transition came with a rapid change of scale and a dispersion of technical data.
The internal teams, still small in number, had to identify water losses, plan works, and present clear, data-backed scenarios to help elected officials make informed decisions.
The stated objective is ambitious: renew 1% of the network each year over the next decade — a demanding trajectory for a utility in transformation.
The network currently shows a performance level of 82.4%, a solid foundation that reflects the community’s commitment to preserving resources while strengthening its technical oversight.

From leak detection to long-term investment planning

• Sprint is now fully integrated within the utility’s operations — monitoring campaigns are no longer occasional but part of the regular network management process.
• It strengthens internal teams, providing the equivalent of full-time support for leak detection and sustained loss reduction.
• With TWIN, the utility now has a consolidated, data-backed view of its network, municipality by municipality.
• The tool improves cost accuracy and facilitates dialogue with elected officials to prioritize renewal projects.
• Centralized data simplifies regulatory monitoring and supports the development of a multi-year investment plan.