Occupational diseases (ODs) encompass all illnesses that physicians—and occupational physicians in particular—determine, based on their expertise, to be related to professional activity and that are not covered by the Social Security system. As a result, they are not included in the Social Security’s annual statistics. As part of its mission to conduct epidemiological surveillance of occupational risks, Santé publique France (SpF) has established, in partnership with the Medical Labor Inspection (IMT) of the Ministry of Labor, a system for the epidemiological surveillance of ODDs. In Brittany, the program has been jointly conducted since 2012 by SpF, the IMT of the Regional Directorate for Enterprises, Competition, Consumer Affairs, Labor, and Employment (Direccte) of Brittany, and the Regional Health Observatory (ORS) of Brittany.