Worst air pollution Saint-Brieuc, today and tomorrow
Today (16 July): Air quality in Saint-Brieuc is fair. NO2 is fair; AQI and O3 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 2:00 PM (O3: 50.9/100).
Tomorrow (17 July 2026): Air quality in Saint-Brieuc is fair. AQI worsens to fair; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 3:00 PM (O3: 39.8/100). 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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Air quality in Saint-Brieuc reflects fishing-port and coastal traffic as the main local source, alongside its setting near the Odet, while Atlantic sea breezes ventilate the coast reliably, generally keeping conditions moderate to good on most days. Air quality remains consistently good throughout the year, with near-constant Atlantic winds preventing the build-up seen in more sheltered inland regions, even in summer.
Today - 16 July | Pollution peaks at 14:00
AQI:
Medium
50.9/100
PM2.5 (fine particles):
Good
10.2/100
PM10 (coarse particles):
Good
3.3/100
NO2 (nitrogen dioxide):
Fair
23.5/100
O3 (ozone):
Medium
50.9/100
SO2 (sulfur dioxide):
Good
2.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.0/100
PM1 (ultrafine particles):
Good
12.3/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 15:00
AQI:
Fair
39.8/100
PM2.5 (fine particles):
Good
7.6/100
PM10 (coarse particles):
Good
2.4/100
NO2 (nitrogen dioxide):
Fair
21.3/100
O3 (ozone):
Fair
39.8/100
SO2 (sulfur dioxide):
Good
2.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.0/100
PM1 (ultrafine particles):
Good
9.4/100
Pollen forecast in Saint-Brieuc
View pollen forecastFrequently Asked Questions
Is air quality bad in Saint-Brieuc right now?
On 16 July 2026, overall air quality in Saint-Brieuc is fair. NO2 is the main pollutant at 23.5/100. Pollution peaks around 2:00 PM (O3: 50.9/100).
Will air quality be worse tomorrow in Saint-Brieuc?
On 17 July 2026, air quality conditions in Saint-Brieuc will be similar to today, with AQI forecast at fair at 39.8/100. Pollution peaks around 3:00 PM (O3: 39.8/100).
When is air pollution at its worst in Saint-Brieuc?
In Saint-Brieuc, the worst combined pollen and air quality days tend to come when fishing-port and coastal traffic coincide with the peak birch and oak pollen season in spring; Atlantic sea breezes ventilate the coast reliably, so conditions usually improve within a day or two. The presence of Breton dairy pasture and coastal farmland in the area adds another layer to the local pattern.
Are air quality levels in Saint-Brieuc 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.
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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