Evian Plant Sabotage Highlights Growing Threat to France's Power Grid

A deliberate act of sabotage on a high-voltage electricity pylon in Haute-Savoie, in the French Alps on the southern shore of Lake Geneva, has brought two major industrial sites near Évian-les-Bains to a standstill. Danone's Evian mineral water bottling plant, one of the largest bottling sites in Europe with around 1,200 employees, and the specialty paper maker Papeteries du Léman, which employs about 250 people, both lost their power supply at the start of the week.

During the night of Sunday 6 to Monday 7 September 2026, attackers sawed through three of the four legs of a pylon on the 63,000-volt line linking Allinges to Publier, in the commune of Marin. The structure began to lean dangerously and grid operator RTE switched off the line for safety reasons. The outage started at around 08:00 on Monday (all times in this article are Paris time). Households in the area lost power for only about eight minutes before supply was rerouted, but the industrial customers that depend on high-voltage supply could not be switched over so easily.

The Evian bottling plant remained at a standstill for close to 36 hours. At Papeteries du Léman, all machines stopped abruptly on Monday morning and the 250 staff found themselves in the dark. The paper mill's general manager, Stéphane Barbereau, explained that the entire production line had to be cleaned and that the local wastewater treatment plant was refusing to take the cleaning water, leaving the site in very poor condition. Power returned to the industrial sites at around 21:00 on Tuesday 8 September, but the paper mill was only able to restart production gradually from around 12:00 on Wednesday 9 September.

The financial toll for the paper maker is heavy. Barbereau estimated the loss of margin at roughly 10,000 euros per hour, meaning more than 480,000 euros after 48 hours of shutdown, a figure he described as enormous for a company of that size. National broadcaster TF1 reported that the sabotage could cost the local economy several million euros once the losses at the bottling plant are included. The paper mill has announced it will file a complaint.

RTE has temporarily stabilized the damaged pylon with a tensioned cable and wooden beams. The operator plans to build a provisional line over the coming days and to replace the pylon permanently within the next few weeks, which is not expected to cause any further disruption for residents. RTE has filed a complaint and the public prosecutor's office in Thonon-les-Bains has opened an investigation, although it has declined to comment publicly. As of 10 September, no arrest has been announced.

On 8 September, an anonymous text claiming responsibility for the attack was published on Indymedia Nantes, an alternative website regularly used by anarchist and ultra-left groups. The authors wrote that their goal was to cut power to two targets below the line, the Evian bottling plant and a local Thales site. They accused the French defense group of producing electronic components for weapons and of partnering with the Israeli company Elbit Systems, and they accused Evian of taking water from the mountain to sell it in plastic bottles. The text also said the group had wanted to hit the neighboring paper mill but believed it had a dedicated power line that was beyond their reach. In reality, Papeteries du Léman was one of the hardest-hit victims. Local media have not reported any disruption at the Thales site in Thonon-les-Bains, which specializes in electronic boards and high-precision mechanics. Investigators have not publicly confirmed the authenticity of the claim.

The authors also expressed solidarity with protesters who opposed the G7 summit held in Évian in mid-June and with activists occupying land to block the planned A412 motorway between Machilly and Thonon-les-Bains, whose environmental permit was signed on 28 August. They praised an arson attack carried out the previous week in Liège, Belgium, against a defense company. Several employees of the affected factories told French media that they found the act irresponsible, noting that it mainly penalizes local businesses and workers.

The method used in Marin is almost identical to the attack that hit the French Riviera in May 2025. At that time, three of the four legs of a 225,000-volt pylon were cut in Villeneuve-Loubet a few hours after an arson attack on the Tanneron substation, leaving about 160,000 homes around Cannes without power on the closing day of the film festival. That attack was also claimed by anarchist groups, and the national anti-terrorism police unit took over the case. In July 2024, coordinated arson attacks on high-speed rail installations disrupted travel for around 800,000 passengers on the day of the Paris Olympics opening ceremony. Germany is facing a similar trend, with an arson attack claimed by far-left activists cutting power to tens of thousands of Berlin households for several days in January 2026, and new attacks on power lines in North Rhine-Westphalia and Brandenburg on 1 September.

These incidents highlight the structural weakness of the grid. France's transmission network includes around 105,000 kilometers of high and very high voltage lines, which makes permanent protection of every pylon impossible. The French national security secretariat has scheduled a nationwide crisis exercise simulating a generalized blackout for 2027.

Supply chain managers should also be aware that France is entering a period of deep political instability that could increase the frequency of such attacks. The presidential election is scheduled for April 2027, and polls currently show the far-right National Rally clearly ahead in the first round, while far-left leader Jean-Luc Mélenchon is competing for a place in the runoff. A victory by either camp would likely bring sharp policy changes and could trigger strong street mobilization from opponents. In the meantime, Prime Minister Sébastien Lecornu's minority government is struggling to pass a 2027 budget through a fragmented National Assembly.

The state's financial position has also narrowed its options. Public debt reached 3,536 billion euros, or 117.5% of GDP, in the first quarter of 2026, and the 10-year borrowing rate has climbed above 4%, its highest level since 2008. Moody's and S&P are due to review France's credit rating on 23 October and 27 November respectively. Unlike during past crises, such as the yellow vest movement of 2018 and 2019, when the government released billions of euros to calm social anger, the country no longer has the budget room to buy social peace.

Judicial deterrence also appears limited. The authors of ultra-left sabotage in France are rarely identified, and the most emblematic prosecution in this field, the Tarnac railway sabotage case, ended in 2018 with acquittals on the main charges. Finally, hostile foreign states may see a polarized pre-election France as an opportunity to sow disorder. European security agencies have repeatedly warned that Moscow uses sabotage and local proxies against countries supporting Ukraine. There is no evidence at this stage linking the Marin attack to any foreign actor.

Taken together, these factors point to an elevated risk of further sabotage against power lines, rail networks and telecom infrastructure in France at least until the 2027 election. Industrial sites connected to the grid through a single high-voltage line, like those near Évian, are among the most exposed and should review their power redundancy, backup capacity and business interruption coverage.