# Pollution of La Valière stream between Mayenne and Ille-et-Vilaine

> Pollution has been discovered in La Valière stream, near Vitré. Investigators from the OFB traced the source of the discharge back to Mayenne.

**In brief**: Environment event (severity: low) in 2 departments (Mayenne, Ille-et-Vilaine), first detected on 4 November 2026 at 09:50. Reported by 1 source (1 article), last updated on 4 November 2026 at 09:50.

- Category: Environment
- Severity: Low
- Place: ruisseau de La Valière — Mayenne, Ille-et-Vilaine
- First detected: 4 November 2026 at 09:50
- Updated: 4 November 2026 at 09:50
- Web page: https://acturadar.com/en/events/9056-pollution-of-la-valiere-stream-between-mayenne-and-ille-et-vilaine

## Sources (1 articles)

- [La police de l’environnement confirme la pollution dans ce ruisseau à cheval entre la Mayenne et l’Ille-et-Vilaine](https://www.ouest-france.fr/environnement/la-police-de-lenvironnement-confirme-la-pollution-dans-ce-ruisseau-a-cheval-entre-la-mayenne-et-lille-et-vilaine-de0829cc-d79e-11f1-a1e1-ae8104d72c9a?utm_source=fluxpublicactu&utm_medium=fluxrss&utm_campaign=banquedecontenu) — Ouest-France, 4 November 2026 at 09:50

---

Cite as: Acturadar, “Pollution of La Valière stream between Mayenne and Ille-et-Vilaine”, https://acturadar.com/en/events/9056-pollution-of-la-valiere-stream-between-mayenne-and-ille-et-vilaine
Methodology: https://acturadar.com/en/methodology