Indoor Air Pollution: An Invisible Yet Major Problem

We spend an average of 80% of our time indoors, whether at home, at work, or in other enclosed spaces. However, indoor air quality is often much more concerning than outdoor air quality, with direct consequences for our health. According to the French Indoor Air Quality Observatory (OQAI), indoor air can be 5 to 9 times more polluted than outdoor air, due to an accumulation of pollutants from various sources (OQAI).

Key Factors in Indoor Pollution

Indoor air pollution results from a complex mix of chemical, biological, and physical pollutants. Among the most common are:

• Humidity and mold: These promote the proliferation of bacteria, dust mites, and spores, exacerbating respiratory conditions such as asthma (ANSES).
• Volatile organic compounds (VOCs): Emitted by paints, adhesives, chipboard furniture, and household products, these substances can cause irritation and, in the long term, toxic effects (Source: ADEME).
• Carbon monoxide (CO): From poorly maintained heating appliances, this odorless gas is responsible for serious poisonings every year (Santé Publique France).
• Fine particles: From cooking, candles, incense, or tobacco, they penetrate deep into the respiratory tract (INSERM).

An Underestimated Impact on Health

The effects of indoor pollution can be immediate (headaches, irritations, fatigue) or chronic (asthma, allergies, cardiovascular disorders). A study by the French Agency for Food, Environmental and Occupational Health & Safety (ANSES) estimates that this pollution is responsible for 20,000 premature deaths per year in France and numerous respiratory illnesses (ANSES).

Despite this, a survey conducted by Murprotec and RespiLab laboratory indicates that 71% of French people are unaware that indoor air can be more polluted than outdoor air. However, good indoor air quality should be a public health priority, just like outdoor pollution (Murprotec/RespiLab).

How to Improve Indoor Air Quality?

Simple actions can limit indoor pollution and improve daily well-being:

• Ventilate daily: 10 minutes of ventilation morning and evening are enough to refresh the air and remove accumulated pollutants.
• Maintain ventilation systems: CMV (Controlled Mechanical Ventilation) and other devices must be regularly cleaned to ensure good air exchange (Santé Publique France).
• Choose low-emission products: Opt for paints, furniture, and household products certified "Ecolabel" or "A+". (Source: ADEME)
• Limit sources of pollution: Reduce the use of scented candles, incense, and avoid smoking indoors.

A Public Health Issue Not to Be Neglected

Although indoor air pollution is invisible, its effects are very real. It should be treated as a public health issue rather than a simple comfort problem. By adopting good practices and learning about sources of pollution, it is possible to limit risks and improve the indoor air quality of our living spaces.

📌 To learn more:

• French Indoor Air Quality Observatory (OQAI)
• French Agency for Ecological Transition (ADEME)
• French Agency for Food, Environmental and Occupational Health & Safety (ANSES)
• Santé Publique France

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