Worst air pollution Milan, today and tomorrow
Today (20 September): Air quality in Milan is poor. AQI, PM2.5, and PM1 are poor; PM10 and NO2 are moderate; O3 and HCHO are fair; SO2 and CO are good. Pollution peaks around 11:00 PM (PM1: 73.8/100).
Tomorrow (21 September 2026): Air quality in Milan is poor. NO2 increases to poor; O3 increases to moderate; all other pollutants stay as today. Pollution peaks around 8:00 PM (NO2: 76.1/100). Airmine updates local air quality forecasts four times daily.
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Milan's air quality is among the most challenging in northern Europe, with the Po Valley's notorious flat basin surrounded by the Alps and Apennines trapping vehicle and industrial emissions under persistent winter anticyclones. This produces some of the EU's highest NO₂ and PM2.5 concentrations, while summer Po Valley ozone is a major warm-season health concern.
Today - 20 September | Pollution peaks at 23:00
AQI:
Poor
73.8/100
PM2.5 (fine particles):
Poor
60.5/100
PM10 (coarse particles):
Moderate
44.8/100
NO2 (nitrogen dioxide):
Moderate
57.3/100
O3 (ozone):
Fair
35.5/100
SO2 (sulfur dioxide):
Good
3.2/100
CO (carbon monoxide):
Good
1.4/100
HCHO (formaldehyde):
Fair
21.7/100
PM1 (ultrafine particles):
Poor
73.8/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 20:00
AQI:
Poor
76.1/100
PM2.5 (fine particles):
Poor
61.2/100
PM10 (coarse particles):
Moderate
44.7/100
NO2 (nitrogen dioxide):
Poor
76.1/100
O3 (ozone):
Moderate
41.6/100
SO2 (sulfur dioxide):
Good
3.1/100
CO (carbon monoxide):
Good
1.5/100
HCHO (formaldehyde):
Fair
22.1/100
PM1 (ultrafine particles):
Poor
74.1/100
Pollen forecast in Milan
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Frequently Asked Questions
Is air quality bad in Milan right now?
On 20 September 2026, overall air quality in Milan is poor. AQI is the main air quality indicator at 73.8/100. Pollution peaks around 11:00 PM (PM1: 73.8/100).
Will air quality be worse tomorrow in Milan?
On 21 September 2026, air quality conditions in Milan will be similar to today, with AQI forecast at poor at 76.1/100. Pollution peaks around 8:00 PM (NO2: 76.1/100).
When is air pollution at its worst in Milan?
Air quality dips in Milan mostly track canal corridor plane and birch pollen peaks and periods of this produces some of the EU's highest NO₂ and PM2.5 concentrations, while summer Po; the rest of the calendar year is generally more forgiving for air quality.
Are air quality levels in Milan 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 14:33 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.
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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