# MEL breaks ground on Wattrelos–Leers wastewater treatment plant expansion

The Métropole Européenne de Lille held the groundbreaking for the expansion and reconstruction of the Wattrelos–Leers wastewater treatment plant. Capacity will increase to 511,500 population-equivalents by 2031, with a new rainwater treatment line and storage basin.

- Type: Expansion
- Announced: 2025-08-28
- Where: Wattrelos–Leers, France, France
- Starts operating: 2031
- Status: under construction
- Capacity: 511,500 population-equivalents
- Products: wastewater treatment services
- Sectors: [Water Treatment Equipment](https://endata.com/sectors/water-treatment-equipment.md)

## Companies

- [Métropole Européenne de Lille](https://endata.com/companies/27800.md)
- [Saur](https://endata.com/companies/5831.md) (partner)
- [Stereau](https://endata.com/companies/33189.md) (partner)
- [NGE](https://endata.com/companies/42809.md) (partner)

## Sources

- [stereau.com](https://www.stereau.com/en/press-releases/the-metropole-europeenne-de-lille-lays-the-foundation-stone-of-the-future-wattrelos-leers-wastewater-treatment-plant/), 2025-09-01: "This milestone marks the launch of a strategic project for the region, one of the largest wastewater treatment plant modernization initiatives in France over the coming decade."

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Data from Endata (https://endata.com/). Announcements are summarized from public sources and may be incomplete; check the linked originals.