Worst air pollution Velletri, today and tomorrow
Today (20 September): Air quality in Velletri is moderate. AQI and PM2.5 are moderate; PM10, NO2, and O3 are fair; SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 AM (PM2.5: 40.9/100).
Tomorrow (21 September 2026): Air quality in Velletri is moderate. PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 8:00 AM (PM2.5: 41.1/100). Airmine updates local air quality forecasts four times daily.
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Velletri's air quality reflects the Castelli Romani volcanic hills southeast of Rome at 332 metres, with vehicle traffic on the A1 motorway and surrounding wine and agricultural operations contributing local sources. The elevated Colli Albani volcanic plateau position aids background dispersal compared to the flat Roman plain below, while the Tyrrhenian sea breezes provide coastal ventilation on westerly days and the volcanic highlands create topographic variation throughout the year.
Today - 20 September | Pollution peaks at 03:00
AQI:
Moderate
40.9/100
PM2.5 (fine particles):
Moderate
40.9/100
PM10 (coarse particles):
Fair
25.4/100
NO2 (nitrogen dioxide):
Fair
29.8/100
O3 (ozone):
Fair
21.3/100
SO2 (sulfur dioxide):
Good
1.2/100
CO (carbon monoxide):
Good
1.2/100
HCHO (formaldehyde):
Good
12.3/100
PM1 (ultrafine particles):
Good
19.2/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 08:00
AQI:
Moderate
41.1/100
PM2.5 (fine particles):
Moderate
41.1/100
PM10 (coarse particles):
Fair
27.8/100
NO2 (nitrogen dioxide):
Fair
29.3/100
O3 (ozone):
Fair
21.7/100
SO2 (sulfur dioxide):
Good
1.1/100
CO (carbon monoxide):
Good
1.1/100
HCHO (formaldehyde):
Good
11.8/100
PM1 (ultrafine particles):
Fair
20.5/100
Pollen forecast in Velletri
View pollen forecastFrequently Asked Questions
Is air quality bad in Velletri right now?
On 20 September 2026, overall air quality in Velletri is moderate. AQI is the main air quality indicator at 40.9/100. Pollution peaks around 3:00 AM (PM2.5: 40.9/100).
Will air quality be worse tomorrow in Velletri?
On 21 September 2026, air quality conditions in Velletri will be similar to today, with AQI forecast at moderate at 41.1/100. Pollution peaks around 8:00 AM (PM2.5: 41.1/100).
When is air pollution at its worst in Velletri?
The most noticeable dips in Velletri's air quality come when torrent corridor linden and vine pollen peaks, or because of vehicle traffic on the A1 motorway and surrounding wine and agricultural operations; the clearest air tends to follow a change in wind direction or rainfall here.
Are air quality levels in Velletri 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: 20 September 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.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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