Worst air pollution Marais district - Paris, today and tomorrow
Today (16 July): Air quality in Marais district is poor. AQI and O3 are poor; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 4:00 PM (O3: 63.6/100).
Tomorrow (17 July 2026): Air quality in Marais district is fair. AQI improves to medium; O3 decreases to medium; PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 1:00 PM (O3: 59.7/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Paris's Marais district sees air quality shaped by traffic on surrounding boulevards and the dense medieval street network, which limits pollutant dispersal. The Seine corridor nearby provides periodic ventilation on westerly winds, but baseline NO₂ remains elevated compared to outer arrondissements.
Today - 16 July | Pollution peaks at 16:00
AQI:
Poor
63.6/100
PM2.5 (fine particles):
Good
14.2/100
PM10 (coarse particles):
Good
4.1/100
NO2 (nitrogen dioxide):
Good
10.1/100
O3 (ozone):
Poor
63.6/100
SO2 (sulfur dioxide):
Good
0.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
15.1/100
PM1 (ultrafine particles):
Good
19.3/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 13:00
AQI:
Medium
59.7/100
PM2.5 (fine particles):
Good
17.6/100
PM10 (coarse particles):
Good
4.9/100
NO2 (nitrogen dioxide):
Good
12.7/100
O3 (ozone):
Medium
59.7/100
SO2 (sulfur dioxide):
Good
0.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
19.0/100
PM1 (ultrafine particles):
Fair
23.1/100
Other Landmarks in Paris
Sports venues in Paris
Frequently Asked Questions
Is air quality bad in Marais district right now?
On 16 July 2026, overall air quality in Marais district is poor. AQI is the main air quality indicator at 63.6/100. Pollution peaks around 4:00 PM (O3: 63.6/100).
Will air quality be worse tomorrow in Marais district?
On 17 July 2026, air quality conditions in Marais district will be better than today, with PM1 forecast at fair at 23.1/100. Pollution peaks around 1:00 PM (O3: 59.7/100).
When is air pollution at its worst in Marais district?
In Marais district, part of Paris, the toughest days combine traffic and urban heating with the birch and plane pollen peak in spring; the Seine corridor channels westerly winds through the city, which usually brings relief within a day or two.
Are air quality levels in Marais district 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.
Want to see air quality forecasts for other cities in France?
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 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.
For long term forecasts and maps, see the Airmine app