Europe's air keeps getting cleaner as key emissions fall
Rule ChangesCAMS 2025 assessment finds regulated pollutants still declining, even as wildfires and winter smog spike local readings
June 29th, 2026: CAMS releases European Air Quality Assessment 2025New here? Follow stories to track developments over time. Create a free account to get updates when stories you care about change.
Overview
Updated Jul 9Europe's air is cleaner than it was a decade ago, and it is still improving. A new assessment from the Copernicus Atmosphere Monitoring Service (CAMS) finds that emissions of the most-regulated pollutants keep falling across the continent.
Industrial sulphur oxide emissions have dropped 59% since 2015. Road-transport nitrogen oxides are down 40%. Cleaner air means fewer heart and lung deaths, so the direction of travel matters for millions of people who never read an emissions report.
Why it matters
Dirty air shortens hundreds of thousands of European lives each year; the CAMS report shows the main pollutants are still on their way down.
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Organizations Involved
CAMS is the EU service, run by ECMWF, that monitors and forecasts air quality across Europe.
NILU is a Norwegian institute specializing in air pollution research and measurement.
Timeline
January 2015 June 2026
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CAMS releases European Air Quality Assessment 2025
Latest ReportThe report confirms regulated pollutants keep falling while winter smog, heat, dust, and wildfires still cause sharp local spikes.
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Summer heat drives an ozone spike
Pollution episodeA major ozone episode forms during August heat, one of four flagged events of the year.
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Iberian wildfires break records
Pollution episodeWildfires burning through August 19 become the Iberian Peninsula's worst of the 21st century. Smoke reaches France.
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Saharan dust reaches Europe
Pollution episodeA dust intrusion from the Sahara raises particle levels across parts of the continent.
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Winter smog crosses borders
Pollution episodeA transboundary fine-particle (PM2.5) episode pushes readings up under cold, stable winter conditions.
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Revised EU air quality directive enters force
LegalThe revised Ambient Air Quality Directive (EU/2024/2881) tightens PM2.5 limits, taking effect from January 2030.
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Baseline year for the decade of cuts
BaselineCAMS measures a decade of emissions cuts against 2015 levels for industry and transport.
Historical Context
3 moments from history that rhyme with this story — and how they unfolded.
Great Smog of London (1952)
A five-day smog from coal smoke settled over London under still, cold air. Visibility fell to a few metres. Contemporary estimates linked thousands of deaths to the event.
Public alarm forced air pollution onto the national agenda for the first time.
Britain passed the Clean Air Act in 1956, restricting coal burning and creating smoke-control zones.
It shows the same mechanism CAMS tracks today: winter weather trapping pollution near the ground turns steady emissions into a deadly spike.
US Acid Rain Program (1990)
Amendments to the US Clean Air Act capped sulphur dioxide from power plants and let companies trade emission allowances. Utilities cut sulphur far faster and cheaper than critics predicted.
Power-plant sulphur dioxide fell sharply through the 1990s.
The program became the model for using emission limits to curb industrial sulphur, the same pollutant now down 59% in EU industry.
It explains why Europe's industrial sulphur has dropped so fast: firm caps on the biggest sources deliver most of the gains.
Gothenburg Protocol (1999)
European and North American governments signed a treaty setting national ceilings for sulphur, nitrogen oxides, ammonia, and volatile organic compounds. It tied clean-air targets to specific tonnage limits per country.
Countries began aligning national emission caps with agreed ceilings.
The protocol, revised in 2012, underpins the EU emission targets that the CAMS reports now measure against.
The decade of decline CAMS documents is the payoff from binding national ceilings set years earlier.
