Worst air pollution Saint-Nazaire, today and tomorrow
Today (16 July): Air quality in Saint-Nazaire is poor. AQI and O3 are poor; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 1:00 PM (O3: 60.6/100).
Tomorrow (17 July 2026): Air quality in Saint-Nazaire is fair. AQI improves to fair; O3 decreases to fair; all other pollutants stay as today. Pollution peaks around 6:00 PM (O3: 38.5/100). 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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Saint-Nazaire's air quality reflects its position as a major Loire estuary industrial port, with Airbus aircraft manufacturing, naval shipbuilding, and the LNG terminal generating elevated industrial and vehicle emissions alongside the A11 motorway traffic. Atlantic westerlies from the Loire-Atlantique coast generally provide strong maritime ventilation, while the industrial port's combined aviation, marine, and heavy industrial character makes Saint-Nazaire one of western France's more industrially distinctive urban environments.
Today - 16 July | Pollution peaks at 13:00
AQI:
Poor
60.6/100
PM2.5 (fine particles):
Good
13.5/100
PM10 (coarse particles):
Good
4.5/100
NO2 (nitrogen dioxide):
Good
19.9/100
O3 (ozone):
Poor
60.6/100
SO2 (sulfur dioxide):
Good
1.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
11.9/100
PM1 (ultrafine particles):
Good
16.8/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 18:00
AQI:
Fair
38.5/100
PM2.5 (fine particles):
Good
9.7/100
PM10 (coarse particles):
Good
2.8/100
NO2 (nitrogen dioxide):
Good
9.7/100
O3 (ozone):
Fair
38.5/100
SO2 (sulfur dioxide):
Good
0.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.8/100
PM1 (ultrafine particles):
Good
12.7/100
Pollen forecast in Saint-Nazaire
View pollen forecastFrequently Asked Questions
Is air quality bad in Saint-Nazaire right now?
On 16 July 2026, overall air quality in Saint-Nazaire is poor. AQI is the main air quality indicator at 60.6/100. Pollution peaks around 1:00 PM (O3: 60.6/100).
Will air quality be worse tomorrow in Saint-Nazaire?
On 17 July 2026, air quality conditions in Saint-Nazaire will be better than today, with AQI forecast at fair at 38.5/100. Pollution peaks around 6:00 PM (O3: 38.5/100).
When is air pollution at its worst in Saint-Nazaire?
Saint-Nazaire's toughest days for allergy and air quality sufferers alike are usually calm, dry ones when river-port traffic and light industry overlap with the oak and plane pollen peak; the Loire estuary and Atlantic winds ventilate the area, offering fairly regular relief.
Are air quality levels in Saint-Nazaire 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