Air dust measurements include air sampling and the analysis and counting of asbestos fibres. They are carried out in accordance with procedures defined by order of the ministers responsible for construction, health and labour.
These measurements are carried out by accredited organisations, which submit an annual activity report to the Minister for Health. An order by the ministers responsible for health and labour defines the terms and conditions of accreditation of these bodies, in particular the qualifications of the persons responsible for carrying out the measurements, as well as the content and conditions of transmission of the annual activity report.