Orano Narbonne: Untreated Uranium Plant Effluent Released After Flooding

Following heavy rainfall over the weekend, the Orano Malvési uranium processing facility in Narbonne, France, released “untreated rainwater” into the environment. This action prompted a response from local authorities, who are now overseeing increased monitoring and assessment of potential impacts.

Urgent Response to Rainfall Event

On January 20, 2026, the Prefecture of Aude formally acknowledged the releases from the Orano Malvési plant, which began on January 19, 2026, during a period of significant precipitation in the Narbonne region. A prefectural order, signed by Secretary General Lucie Roesch, states that the facility is currently discharging rainwater without prior treatment.

Increased Scrutiny and Evaluation

The state is directing Orano to enhance surveillance of rainwater discharges and the surrounding effluent storage basins. This intensified monitoring will specifically focus on levels of uranium, nitrates, fluorides, and ammonium. Furthermore, an evaluation of the environmental and health impacts of these releases has been mandated.

Did You Know? The facility initiated its Internal Operations Plan (POI) on January 19, 2026, at 6:40 AM as a preventative measure.

Authorities noted that the heavy rains caused “intense inputs” into the evaporation basins, necessitating a closer examination of basin levels and structural integrity – including visual checks for damage and leak detection. Orano is required to collect samples at least four times daily from the rainwater discharge and three times daily from the basins, submitting analysis reports to the prefect within one month.

Facility Response and Safety Measures

Orano Malvési activated its Internal Operations Plan (POI) on January 19th, and the plan was lifted on January 20th at 6:00 PM following inspections. The company states that installations were already shut down at the time of the events. Collaboration with the Direction régionale de l’Environnement, de l’Aménagement et du Logement (DREAL), the Prefecture of Aude, and the Aude Departmental Fire and Rescue Service was central to ensuring proper oversight.

Expert Insight: The activation of an Internal Operations Plan suggests a proactive approach to managing potential risks associated with extreme weather events at a sensitive industrial site. The coordinated response involving multiple agencies underscores the importance of established protocols for safeguarding both the environment and public health.

According to Orano Malvési, contact with authorities began Sunday evening, January 18th, as the storm approached. An independent expert assessed the stability of the site’s dikes, confirming their structural soundness. Recent samples of the rainwater discharge reportedly remain within the concentration limits established by the prefectural order. The company states that “other complementary measures are in progress” to continue monitoring, with results to be shared with authorities.

Orano Malvési maintains that there was “no overflow of our basins” and that ongoing surveillance is being maintained.

Frequently Asked Questions

What prompted the release of untreated water?

Heavy rainfall during the weekend of January 18-19, 2026, led to an influx of water into the Orano Malvési facility’s evaporation basins, resulting in the discharge of untreated rainwater.

What parameters are being monitored in the discharged water?

The state is requiring Orano to monitor levels of uranium, nitrates, fluorides, and ammonium in the discharged rainwater and the water within the effluent storage basins.

Was there a breach of containment at the facility?

Orano Malvési states that there was no overflow from its basins, and an independent expert confirmed the stability of the site’s dikes.

Given the complexities of managing industrial sites in the face of extreme weather, what additional preventative measures might be considered to mitigate future risks?