Worst air pollution Velletri, today and tomorrow
Today (9 August): Air quality in Velletri is fair. HCHO is fair; AQI and O3 are medium; PM2.5, PM10, NO2, SO2, CO, and PM1 are good. Pollution peaks around 2:00 PM (O3: 51.9/100).
Tomorrow (10 August 2026): Air quality in Velletri is medium. HCHO decreases to good; all other pollutants stay as today. Pollution peaks around 4:00 PM (O3: 58.8/100). Airmine updates local air quality forecasts four times daily.
Get the full experience in the Airmine app.
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Follow your pollen exposure and performance with the free Airmine–Strava integration. See your pollen and air quality exposure for every Strava activity.
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 - 9 August | Pollution peaks at 14:00
AQI:
Medium
51.9/100
PM2.5 (fine particles):
Good
16.3/100
PM10 (coarse particles):
Good
5.4/100
NO2 (nitrogen dioxide):
Good
16.0/100
O3 (ozone):
Medium
51.9/100
SO2 (sulfur dioxide):
Good
0.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Fair
21.7/100
PM1 (ultrafine particles):
Good
19.5/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 16:00
AQI:
Medium
58.8/100
PM2.5 (fine particles):
Good
15.1/100
PM10 (coarse particles):
Good
5.2/100
NO2 (nitrogen dioxide):
Good
12.2/100
O3 (ozone):
Medium
58.8/100
SO2 (sulfur dioxide):
Good
1.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
13.0/100
PM1 (ultrafine particles):
Good
17.0/100
Pollen forecast in Velletri
View pollen forecastFrequently Asked Questions
Is air quality bad in Velletri right now?
On 9 August 2026, overall air quality in Velletri is fair. HCHO is the main pollutant at 21.7/100. Pollution peaks around 2:00 PM (O3: 51.9/100).
Will air quality be worse tomorrow in Velletri?
On 10 August 2026, air quality conditions in Velletri will be better than today, with AQI forecast at medium at 58.8/100. Pollution peaks around 4:00 PM (O3: 58.8/100).
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.
Want to see air quality forecasts for other cities in Italy?
Check air quality in other popular cities:
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.
Get the full experience in the Airmine app.