The Air We
Breathe

France monitors air quality across 13 regions. The maps show three pollutants — NO₂, ozone, and fine particles — and how much each region has improved since 2015. The patterns are not what you might expect.

France's air quality divide: urban cores vs. clean periphery

NO₂ from road traffic and industry is the most widespread pollutant. Île-de-France, PACA, and Auvergne-Rhône-Alpes — France's three largest urban regions — consistently exceed WHO guidelines. Brittany and Corsica record the cleanest air.

EU legal limit: 40 µg/m³. WHO guideline: 10 µg/m³. No French region meets the WHO target.

Paris, Lyon, Marseille: the NO₂ triangle

Three regions pull far ahead of the rest: Île-de-France (32 µg/m³), Auvergne-Rhône-Alpes (22), and PACA (24). Dense road networks and port activity drive the gap. All three have exceeded EU legal limits in recent years along major corridors.

Summer ozone: the south pays the price for sunshine

Ozone isn't emitted directly — it forms when sunlight reacts with traffic and industrial fumes. The south of France, with its intense UV radiation and heat, generates the most ozone episodes: Occitanie records 44 days per year above the alert threshold.

The 2022 heatwave pushed ozone episodes to a decade high across southern regions. Climate change means this will worsen.

Fine particles: winter heating and industrial legacy

PM2.5 tells a different geographic story. Hauts-de-France (14 µg/m³) leads the country — a legacy of steel and chemical industry combined with dense residential wood-burning in winter. Grand Est and Auvergne-Rhône-Alpes follow.

The EU limit is 25 µg/m³ — all regions comply. But the WHO guideline is 5 µg/m³. Every single French region exceeds it.

2015 – 2023: every region improved, none enough

NO₂ has fallen 25–38% across France since 2015 — driven by Euro 6 vehicle standards, urban low-emission zones, and COVID's structural effect on commuting patterns. Brittany leads with −35%; PACA and Hauts-de-France lag.

At this pace, the WHO guideline of 10 µg/m³ is unreachable before 2040 in urban regions.

Sources

Data is approximate and for illustrative purposes only. Verify against official publications before any decision-making use.