Worst air pollution Colosseum - Rome, today and tomorrow
Today (9 August): Air quality in Colosseum is fair. NO2 and PM1 are fair; AQI and O3 are medium; PM2.5, PM10, SO2, CO, and HCHO are good. Pollution peaks around 2:00 PM (O3: 47.7/100).
Tomorrow (10 August 2026): Air quality in Colosseum is fair. PM2.5 increases to fair; all other pollutants stay as today. Pollution peaks around 3:00 PM (O3: 55.3/100). Airmine updates local air quality forecasts four times daily.
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Rome's Colosseum sits within one of the city's highest-traffic zones, with vehicle emissions elevating NO₂ and PM10 significantly above residential averages. Winter temperature inversions trap exhaust emissions across the historic centre, producing the worst annual pollution episodes.
Today - 9 August | Pollution peaks at 14:00
AQI:
Medium
47.7/100
PM2.5 (fine particles):
Good
16.8/100
PM10 (coarse particles):
Good
5.5/100
NO2 (nitrogen dioxide):
Fair
28.2/100
O3 (ozone):
Medium
47.7/100
SO2 (sulfur dioxide):
Good
2.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
19.5/100
PM1 (ultrafine particles):
Fair
20.0/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 15:00
AQI:
Medium
55.3/100
PM2.5 (fine particles):
Fair
20.2/100
PM10 (coarse particles):
Good
6.3/100
NO2 (nitrogen dioxide):
Fair
24.3/100
O3 (ozone):
Medium
55.3/100
SO2 (sulfur dioxide):
Good
2.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
16.3/100
PM1 (ultrafine particles):
Fair
23.5/100
Other Landmarks in Rome
Sports venues in Rome
Frequently Asked Questions
Is air quality bad in Colosseum right now?
On 9 August 2026, overall air quality in Colosseum is fair. NO2 is the main pollutant at 28.2/100. Pollution peaks around 2:00 PM (O3: 47.7/100).
Will air quality be worse tomorrow in Colosseum?
On 10 August 2026, air quality conditions in Colosseum will be similar to today, with NO2 forecast at fair at 24.3/100. Pollution peaks around 3:00 PM (O3: 55.3/100).
When is air pollution at its worst in Colosseum?
Colosseum residents notice reduced air quality mainly when local tree and grass allergens peaks, and during spells of vehicle emissions; conditions generally improve once the season shifts and rainfall or stronger winds return.
Are air quality levels in Colosseum 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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