Réindustrialisation Fos Berre : adapter la surveillance de la qualité de l’air est impératif !

The industrial landscape of the Fos-Berre region in Southern France is currently undergoing a massive transformation, driven by ambitious government-backed projects aimed at large-scale reindustrialization and decarbonization. However, as the region prepares for this new industrial era, a coalition of environmental and health associations has raised urgent alarms regarding the adequacy of the current air quality monitoring infrastructure. The central argument presented by these groups is that without a fundamental upgrade in how pollution is measured and analyzed, the health of the local population remains inadequately protected against the cumulative effects of industrial expansion.

A Legacy of Monitoring Gaps

The Fos-Berre industrial zone is one of Europe’s most significant chemical and petrochemical hubs. Historically, the management of air quality in this area has relied on a network of fixed monitoring stations. However, recent data suggests a trend toward contraction rather than expansion. Between 2011 and 2025, the region saw the closure of 24 fixed monitoring stations, particularly in the western part of the department, where the highest density of industrial activity and new development projects are situated.

For local stakeholders, this reduction in monitoring capacity is fundamentally at odds with the scale of the upcoming industrial projects. The current network, they argue, is ill-equipped to track the specific cocktail of pollutants emitted by modern industrial processes. Specifically, there is a lack of sustained, real-time monitoring for ultra-fine particles (UFP)—which are widely considered by toxicologists to be the most dangerous to human health due to their ability to penetrate deep into the bloodstream—and for hazardous substances such as PFAS (per- and polyfluoroalkyl substances) and heavy metals like cadmium.

The Debate Over Scientific Methodology

The skepticism regarding current air quality reporting is further fueled by a perceived disconnect between official environmental communications and the findings of independent studies. While the state and industrial operators often cite models such as SCENARI 2 to evaluate potential risks, local groups point to significant limitations in these methodologies.

SCENARI 2 is primarily a theoretical risk assessment based on average emission data provided by the industrial operators themselves. It operates on the assumption that if emissions stay within regulatory limits, the risk to the population is mitigated. Critics argue that this approach ignores the "real-world" health status of the residents. By relying on averages, the study fails to account for peak pollution events or the "lissage" (smoothing) effect that masks the severity of short-term exposure, which is often when the most acute health impacts occur.

Furthermore, studies like REVELA 13—which focuses on specific cancers such as kidney, bladder, and acute leukemia—are viewed by activists as too narrow. They contend that by focusing on a limited set of pathologies, these studies fail to capture the broader, complex relationship between industrial environments and public health. Missing from these official evaluations are indicators for neurodegenerative diseases, cardiovascular ailments, pancreatic cancers, and cognitive disorders, all of which have been linked in various international studies to chronic exposure to atmospheric pollutants.

The "One Health" Perspective

The coalition of associations is pushing for the adoption of a "One Health" approach—a strategy endorsed by the French government that recognizes the interconnectedness of human, animal, and environmental health. They argue that the current industrial evaluation framework is siloed and ignores the bioaccumulation of toxins in the food chain, the loss of local biodiversity, and the potential for zoonotic diseases emerging from environmental degradation.

By failing to evaluate the "exposome"—the totality of environmental exposures an individual experiences over a lifetime—the current assessment protocols risk underestimating the cumulative impact of living in an industrial hotspot. The demand is for a more holistic approach that integrates air quality data with longitudinal health studies, rather than relying on disparate, project-specific snapshots.

Chronology of Growing Tensions

The friction between regional authorities and civil society has been building for several years:

• 2011-2025: A steady decline in fixed air quality monitoring stations, with 24 units decommissioned.
• March 24, 2026: A formal inquiry was sent by the coalition of associations to the regional prefect, requesting a review of the monitoring strategy. No response has been received.
• May 6, 2026: A follow-up inquiry was submitted by European Parliament member Nora Mebarek, highlighting the urgency of the matter. This request also remains unanswered.
• April 2026: The "One Health Summit" in Lyon highlighted the necessity for integrated monitoring, yet local groups report that these principles have yet to be applied to the Fos-Berre industrial plans.

The Need for Real-Time Transparency

The crux of the issue for local residents is the lack of transparency and the absence of real-time, granular data. The coalition emphasizes that "annual average concentrations" are not sufficient to describe the reality of daily life in the shadow of refineries and manufacturing plants. For vulnerable populations, such as children and the elderly, the impact of a 24-hour spike in particulate matter cannot be mitigated by an annual average that stays within legal limits.

The associations, which include groups like France Nature Environnement PACA and the Association de défense et de Protection du Golfe de Fos, are calling for a permanent, collaborative monitoring system. This system would ideally involve all stakeholders—industry, government, and the public—and provide data that is not only transparent but also actionable.

Institutional Implications and Policy Challenges

The refusal or inability of state authorities to engage with these concerns presents a significant governance challenge. In the context of the European Green Deal and France’s own climate objectives, the "greening" of industrial zones is a high-priority political goal. If these projects are labeled as "virtuous" and "decarbonized," the public expects them to set a new standard for environmental stewardship.

However, the current lack of rigorous monitoring suggests a "business-as-usual" approach regarding environmental health. If the regional administration continues to ignore these requests for dialogue, it risks alienating the local population, which could lead to increased legal challenges, project delays, and a loss of public trust in the transition process.

Moving Toward a Sustainable Future

To bridge this gap, observers suggest that the government must pivot from a model of "permitted emissions" to one of "continuous impact monitoring." This would involve:

1. Investment in Sensor Networks: Deploying a dense network of high-sensitivity sensors capable of tracking ultra-fine particles and specific industrial markers in real-time.
2. Independent Audit Protocols: Moving away from industry-reported data and toward independent, third-party verification of air quality metrics.
3. Expanded Health Surveillance: Establishing a long-term health registry that monitors the specific pathologies mentioned by the associations, allowing for better correlation between industrial activity and public health outcomes.
4. Participatory Governance: Creating a permanent forum where residents and environmental scientists have a say in how air quality is monitored and how that data is communicated to the public.

As Fos-Berre stands at the threshold of a new industrial era, the mandate for its developers is clear: economic progress cannot come at the expense of environmental transparency. The insistence from the signatory associations is that if the industrial zone is to be truly sustainable, it must be accountable—starting with the very air the citizens breathe. The path forward requires a shift from defensive posturing to a collaborative framework that prioritizes public health as the primary indicator of industrial success. Without such a shift, the "virtuous" label applied to the region’s reindustrialization will continue to be contested by those who live with its consequences every day.