Formaldehyde in French homes

The air in many French homes contains formaldehyde, a carcinogenic gas detected in 99.7% of residences studied in a major national survey on indoor air quality published in 2025. The substance, a reagent used in various industries and medical sectors, is present in both natural and human-made forms.

Health and safety concerns

According to the National Institute for Research and Safety (INRS), formaldehyde is essential in the production of many chemical substances. While it is classified as a definite human carcinogen and can irritate the eyes and respiratory system, its presence alone does not make a home toxic. The level of concern depends on the concentration of the gas and the duration of exposure.

Trends in formaldehyde levels

Recent data show that formaldehyde concentrations have generally decreased since the previous national survey, conducted between 2003 and 2005. However, about 6% of the studied homes still exceed 30 micrograms per cubic meter (µg/m³), a threshold at which the High Council of Public Health recommends identifying and addressing pollution sources.

Sources of formaldehyde

Formaldehyde can be found in various household products, including paints, glues, floor coverings, and furniture made from particle board or wood residues. Some glues and resins used in these products can release formaldehyde into the air over several years.

Regulation and consumer advice

In France, certain indoor products such as paints, varnishes, and floor coverings must display emissions classifications ranging from A+ (very low emissions) to C (high emissions), with formaldehyde being one of the pollutants considered. However, this requirement does not apply to all indoor products, including furniture, for which there is no standardized emissions score. Consumers are advised to consult manufacturer information or consider furniture made with plant-based adhesives that do not contain formaldehyde.

European regulation on formaldehyde

A new European regulation, effective since August 6, 2026, imposes limits on formaldehyde emissions from furniture sold in the European Union. However, this regulation does not eliminate formaldehyde from furniture entirely, nor does it provide a label for comparing emissions before purchase.