Lead Dust Thresholds in France: Regulations, Limits and Interpretation
A lead dust threshold provides a reference for assessing surface contamination in a building. Following work involving lead, testing can support checks on cleaning effectiveness and help assess potential exposure.
What Is the French Post-Work Lead Dust Threshold?
Results are expressed in µg/m² (micrograms per square metre), representing the amount of lead per unit of sampled surface area.
- Floor dust criterion: 1,000 µg/m²
- Purpose: help limit occupants’ exposure
- Scope: the specific French post-work checks governed by the Order of 12 May 2009
This value is not a universal limit for every surface, building or renovation project, and it does not guarantee the absence of health risks.
How Should Results Be Interpreted?
- ≤ 1,000 µg/m²: meets this numerical criterion, but does not establish overall compliance on its own.
- > 1,000 µg/m²: under the applicable post-work procedure, further thorough cleaning and repeat sampling are required.
Results must be considered alongside the inspection findings and the requirements applicable to the work.
How Is Lead Dust Measured?
Dust is collected using a wipe over a defined, measured area, then analysed in a laboratory. Under this French post-work procedure, the specified floor sampling area is 0.1 m².
When Should Lead Dust Levels Be Checked?
Depending on the project and the applicable requirements, testing may be relevant:
- After renovation work involving lead-containing materials
- After stripping old paint
- When assessing contamination in older properties
- Before an affected area is reoccupied
Related Lead Testing Services
👉 Lead dust testing forms part of a wider assessment: explore our lead testing services.
To measure surface contamination, visit our dedicated page: lead dust testing.
BJL Laboratoires supports you with lead testing and the interpretation of laboratory results.