Occupational diseases (OD) are defined as illnesses or symptoms that may be work-related¹ and have not been recognized by social security systems. This concept was introduced by the legislature as early as 1919 to help update the list of occupational diseases (OD) and identify new work-related conditions. As part of its mission to conduct epidemiological surveillance of occupational risks, Santé publique France, in collaboration with the Occupational Health Inspection (Directorate General of Labor) and the Regional Health Observatories, has been responsible for monitoring these conditions since 2003. The system, which relies on the expertise of occupational physicians from the Occupational Health and Safety Services (SPST), aims to document the relevant conditions, the occupational exposure factors (biomechanical, physicochemical, or psychosocial-organizational, etc.) that contribute to their occurrence, and high-risk situations (sectors of activity, occupations, etc.). Surveys are conducted in nine regions of mainland France, including the Pays de la Loire, and two overseas departments and regions. The physicians and their teams participating in these surveys do so on a voluntary basis. This brochure presents the key findings from the MCP Fortnightly Surveys conducted in 2024 in the Pays de la Loire.