Worst air pollution Paris, today and tomorrow
Today (20 September): Air quality in Paris is fair. AQI, PM2.5, NO2, and PM1 are fair; PM10, O3, SO2, CO, and HCHO are good. Pollution peaks around 10:00 AM (NO2: 33.0/100).
Tomorrow (21 September 2026): Air quality in Paris is moderate. AQI worsens to moderate; PM10 increases to fair; NO2 increases to moderate; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 10:00 AM (NO2: 43.9/100). Airmine updates local air quality forecasts four times daily.
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Paris' air quality is driven by traffic on the Périphérique and surrounding boulevards, with the Seine corridor channelling westerly winds through the urban core. Calm anticyclonic conditions in winter trap particulates and NO₂ across the dense arrondissements, while the open Île-de-France countryside provides cleaner air on windier days.
Today - 20 September | Pollution peaks at 10:00
AQI:
Fair
33.0/100
PM2.5 (fine particles):
Fair
27.5/100
PM10 (coarse particles):
Good
16.5/100
NO2 (nitrogen dioxide):
Fair
33.0/100
O3 (ozone):
Good
17.2/100
SO2 (sulfur dioxide):
Good
0.9/100
CO (carbon monoxide):
Good
0.7/100
HCHO (formaldehyde):
Good
11.8/100
PM1 (ultrafine particles):
Fair
26.0/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 10:00
AQI:
Moderate
43.9/100
PM2.5 (fine particles):
Fair
29.9/100
PM10 (coarse particles):
Fair
20.7/100
NO2 (nitrogen dioxide):
Moderate
43.9/100
O3 (ozone):
Fair
32.5/100
SO2 (sulfur dioxide):
Good
1.5/100
CO (carbon monoxide):
Good
0.8/100
HCHO (formaldehyde):
Good
14.5/100
PM1 (ultrafine particles):
Fair
31.3/100
Pollen forecast in Paris
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Frequently Asked Questions
Is air quality bad in Paris right now?
On 20 September 2026, overall air quality in Paris is fair. AQI is the main air quality indicator at 33.0/100. Pollution peaks around 10:00 AM (NO2: 33.0/100).
Will air quality be worse tomorrow in Paris?
On 21 September 2026, air quality conditions in Paris will be worse than today, with AQI forecast at moderate at 43.9/100. Pollution peaks around 10:00 AM (NO2: 43.9/100).
When is air pollution at its worst in Paris?
In Paris, the combination of traffic and urban heating and heavy birch and plane pollen in spring is what most affects sensitive groups; the Seine corridor channels westerly winds through the city, so poor conditions rarely last more than a couple of days. Nearby Île-de-France farmland add a further seasonal factor.
Are air quality levels in Paris based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 20 September 2026 at 14:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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