Worst air pollution Saint-Herblain, today and tomorrow
Today (9 August): Air quality in Saint-Herblain is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 2:00 PM (O3: 38.0/100).
Tomorrow (10 August 2026): Air quality in Saint-Herblain is fair. All pollutants stay as today. Pollution peaks around 4:00 PM (O3: 27.3/100). Airmine updates local air quality forecasts four times daily.
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Saint-Herblain's air quality reflects the greater Nantes metropolitan area's western suburban corridor, with vehicle traffic on the N844 ring road and surrounding industrial and logistics character contributing local sources. Atlantic westerlies from the Loire-Atlantique coast generally provide maritime ventilation, while the Loire river corridor provides additional ventilation and the suburban industrial character keeps Saint-Herblain's readings consistently moderate within the broader Nantes metropolitan area throughout most of the year.
Today - 9 August | Pollution peaks at 14:00
AQI:
Fair
38.0/100
PM2.5 (fine particles):
Good
10.7/100
PM10 (coarse particles):
Good
8.3/100
NO2 (nitrogen dioxide):
Good
11.2/100
O3 (ozone):
Fair
38.0/100
SO2 (sulfur dioxide):
Good
1.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.2/100
PM1 (ultrafine particles):
Good
6.0/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 16:00
AQI:
Fair
27.3/100
PM2.5 (fine particles):
Good
7.4/100
PM10 (coarse particles):
Good
5.3/100
NO2 (nitrogen dioxide):
Good
6.4/100
O3 (ozone):
Fair
27.3/100
SO2 (sulfur dioxide):
Good
1.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.9/100
PM1 (ultrafine particles):
Good
4.4/100
Pollen forecast in Saint-Herblain
View pollen forecastFrequently Asked Questions
Is air quality bad in Saint-Herblain right now?
On 9 August 2026, overall air quality in Saint-Herblain is fair. AQI is the main air quality indicator at 38.0/100. Pollution peaks around 2:00 PM (O3: 38.0/100).
Will air quality be worse tomorrow in Saint-Herblain?
On 10 August 2026, air quality conditions in Saint-Herblain will be similar to today, with AQI forecast at fair at 27.3/100. Pollution peaks around 4:00 PM (O3: 27.3/100).
When is air pollution at its worst in Saint-Herblain?
For people sensitive to both pollen and pollution in Saint-Herblain, spring days combining river-port traffic and light industry with the oak and plane peak are the ones to watch; the Loire estuary and Atlantic winds ventilate the area, which tends to clear things fairly quickly.
Are air quality levels in Saint-Herblain 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: 9 August 2026 at 20:27 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.
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