Air Quality and Health: What the 2025 Report Reveals for France
As spring arrives in March 2026, Atmo Hauts-de-France has released its annual air quality report for 2025, offering a detailed analysis of pollutant levels, population exposure, and the pollen season. Air pollution remains a significant public health concern, ranking as the third leading cause of mortality in France, following alcohol and tobacco use. This report focuses specifically on the Hauts-de-France region, an area with a dense population and a history of industrial activity, where the health impacts of air pollution are closely monitored.
Overall Trends: Improvement with a Note of Caution
The 2025 report confirms a general trend of improving air quality over the past decades. However, the rate of improvement has slowed, and the situation is more fragile than in 2024. While many pollutant levels have decreased, chronic population exposure remains a concern.
Pollen Levels and Allergy Concerns
Alongside air pollutants, Atmo Hauts-de-France also monitors pollen levels, as one in three people in France suffer from pollen allergies according to the report. The 2025 tree pollination season extended from January to May, followed by herbaceous plants and grasses. A total of 33,286 grains/m3 of pollen was recorded, making it the fourth highest concentration in the last ten years.
Key Pollen Types
- Urticaceae: At 6,421 grains/m3, this plant species released the most pollen. While not highly allergenic, it can cause eye irritation due to hairs on its leaves and flowers.
- Grasses: Concentrations of 4,780 grains/m3 were recorded, posing a strong allergenic potential.
- Cupressaceae: Levels reached 4,159 grains/m3.
The Impact of Pollution on Allergies
Air pollution can exacerbate allergies. Pollen grains are deformed or fractured by pollutants like ozone, sulfur dioxide, and nitrogen dioxide, creating smaller fragments that penetrate deeper into the respiratory tract and become more allergenic. Pollution also weakens mucous membranes, increasing sensitivity to pollen.
Protecting Yourself from Pollen
Several steps can be taken to minimize exposure:
- Retain car windows closed while traveling.
- Avoid drying laundry outdoors.
- Limit exposure during activities like gardening or outdoor sports.
- Rinse hair in the evening to remove deposited pollen.
- Air out homes for at least 10 minutes daily before sunrise or after sunset.
- Avoid irritating or allergenic products like tobacco, cleaning products, and strong perfumes.
Recent Pollen Index Launched
In April 2025, Atmo Hauts-de-France launched a new pollen index to monitor six types of pollen – alder, birch, olive, grasses, ragweed, and mugwort – using a scale ranging from “very low” to “extremely high” risk.
Oxidative Potential of Atmospheric Particles
Recent research highlights the importance of considering the oxidative potential (OP) of atmospheric particles, not just their mass concentration, when assessing health impacts. A study analyzing data from across Europe found high spatial variability in OP, influenced by site type (urban vs. Rural). The study suggests that reducing traffic emissions is key to lowering OP in cities, while comprehensive reductions in both traffic and biomass burning are needed to meet World Health Organization mass guidelines.
The Atmo Hauts-de-France continues to monitor air quality and provide information to the public, businesses, and local authorities to promote healthier air for all.