Almost a retention basin, sick inhabitants question the origin of their pathology
Fungal Infections spark Concerns over Stagnant Water in La Baule
Updated June 02, 2025
Two residents of the Guézy district in La Baule, Loire-Atlantique, have contracted aspergillosis, a fungal infection often linked to damp environments. The cases have prompted questions about the maintenance of local retention basins.
During a recent municipal council meeting, laetitia English, an opposition advisor, raised concerns about the potential link between the aspergillosis cases and stagnant water. She described the situation as “worrying,” noting that one patient now requires a mask.
English inquired about planned maintenance for the basins on behalf of concerned residents. Mayor Franck Louvrier responded that the regional Health Agency (ARS) had been contacted to investigate any causal relationship. He added that while the ARS has not yet intervened, the situation is being monitored by state services.
Annabelle Garand,deputy mayor for the affected district,stated that the city would implement any necessary measures if the ARS determined a health problem existed. She also mentioned visiting the site.
The ARS confirmed it is indeed reviewing reports from two residents who beleive their conditions are linked to the retention basin. The agency stated that a standardized approach is needed to determine if the number of cases is unusual and if they share a common cause. They require detailed information on symptoms,conditions of onset,and the environmental context.
According to the ARS, the current information lacks details on the onset and nature of the illnesses, making it challenging to assess the situation as unusual. The agency also noted that a municipal police observation did not indicate a concerning environmental situation. As such, the ARS does not currently consider the situation alarming.
Joël Moreau, president of the neighborhood association L’Avis du Guézy, expressed disappointment with the ARS’s response. He believes the agency has not adequately investigated the concerns of residents. Moreau also highlighted recent work on the Noue basin, where a semi-buried structure was created. He fears that the standing water in the open-air section could create a breeding ground for pests due to lack of infiltration and reliance on evaporation.
Garand countered that not all stagnant water is unhealthy and that the work on the basin is not yet complete. She added that features would be installed around the area.
what’s next
The ARS will continue to monitor the situation and gather more information to determine if further action is necessary. Residents and local officials await further assessment of the potential link between the aspergillosis cases and the environmental conditions of the retention basins.
