Worst air pollution Sfântu-Gheorghe, today and tomorrow
Today (10 August): Air quality in Sfântu-Gheorghe is fair. O3 and PM1 are fair; AQI and NO2 are medium; PM2.5, PM10, SO2, CO, and HCHO are good. Pollution peaks around 11:00 PM (NO2: 52.3/100).
Tomorrow (11 August 2026): Air quality in Sfântu-Gheorghe is poor. AQI worsens to poor; PM2.5 increases to fair; NO2 increases to poor; O3 decreases to medium; all other pollutants stay as today. Pollution peaks around 3:00 AM (NO2: 65.6/100). 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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Sfântu-Gheorghe's air quality reflects the Olt river valley in the eastern Transylvanian basin at 525 metres surrounded by the Carpathian mountains, with vehicle traffic on the E574 and surrounding manufacturing industry contributing local sources alongside winter residential wood and coal burning. The Carpathian highlands create significant topographic enclosure, while winter inversions in the enclosed Transylvanian basin concentrate heating and vehicle emissions and summer conditions are considerably better with mountain breezes providing effective ventilation.
Today - 10 August | Pollution peaks at 23:00
AQI:
Medium
52.3/100
PM2.5 (fine particles):
Good
17.1/100
PM10 (coarse particles):
Good
4.9/100
NO2 (nitrogen dioxide):
Medium
52.3/100
O3 (ozone):
Fair
35.7/100
SO2 (sulfur dioxide):
Good
11.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.1/100
PM1 (ultrafine particles):
Fair
21.8/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 03:00
AQI:
Poor
65.6/100
PM2.5 (fine particles):
Fair
20.0/100
PM10 (coarse particles):
Good
5.8/100
NO2 (nitrogen dioxide):
Poor
65.6/100
O3 (ozone):
Medium
44.6/100
SO2 (sulfur dioxide):
Good
13.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
10.1/100
PM1 (ultrafine particles):
Fair
24.8/100
Pollen forecast in Sfântu-Gheorghe
View pollen forecastFrequently Asked Questions
Is air quality bad in Sfântu-Gheorghe right now?
On 10 August 2026, overall air quality in Sfântu-Gheorghe is fair. O3 is the main pollutant at 35.7/100. Pollution peaks around 11:00 PM (NO2: 52.3/100).
Will air quality be worse tomorrow in Sfântu-Gheorghe?
On 11 August 2026, air quality conditions in Sfântu-Gheorghe will be worse than today, with AQI forecast at poor at 65.6/100. Pollution peaks around 3:00 AM (NO2: 65.6/100).
When is air pollution at its worst in Sfântu-Gheorghe?
You're most likely to notice worse air in Sfântu-Gheorghe when local tree and grass pollen peaks, or due to vehicle traffic on the E574 and surrounding manufacturing industry; conditions generally improve once the season shifts and rainfall or stronger winds return.
Are air quality levels in Sfântu-Gheorghe 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: 10 August 2026 at 02:34 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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