Worst air pollution Terni, today and tomorrow
Today (9 August): Air quality in Terni is fair. NO2 is fair; AQI and O3 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 5:00 PM (O3: 41.3/100).
Tomorrow (10 August 2026): Air quality in Terni is fair. All pollutants stay as today. Pollution peaks around 6:00 PM (O3: 50.4/100). Airmine updates local air quality forecasts four times daily.
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Terni's air quality faces significant industrial challenges as Umbria's main industrial city, with the ThyssenKrupp steel plant and surrounding chemical and electrochemical manufacturing operations generating elevated PM2.5, SO₂, and heavy metals alongside vehicle traffic on the E45. The Nera river valley's topographic enclosure between the Appennino Umbro-Marchigiano massifs concentrates industrial and vehicle emissions under frequent winter temperature inversions throughout the year.
Today - 9 August | Pollution peaks at 17:00
AQI:
Medium
41.3/100
PM2.5 (fine particles):
Good
9.2/100
PM10 (coarse particles):
Good
3.3/100
NO2 (nitrogen dioxide):
Fair
29.9/100
O3 (ozone):
Medium
41.3/100
SO2 (sulfur dioxide):
Good
1.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
12.7/100
PM1 (ultrafine particles):
Good
10.7/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 18:00
AQI:
Medium
50.4/100
PM2.5 (fine particles):
Good
11.2/100
PM10 (coarse particles):
Good
4.0/100
NO2 (nitrogen dioxide):
Fair
25.7/100
O3 (ozone):
Medium
50.4/100
SO2 (sulfur dioxide):
Good
1.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
18.8/100
PM1 (ultrafine particles):
Good
12.7/100
Pollen forecast in Terni
View pollen forecastFrequently Asked Questions
Is air quality bad in Terni right now?
On 9 August 2026, overall air quality in Terni is fair. NO2 is the main pollutant at 29.9/100. Pollution peaks around 5:00 PM (O3: 41.3/100).
Will air quality be worse tomorrow in Terni?
On 10 August 2026, air quality conditions in Terni will be similar to today, with NO2 forecast at fair at 25.7/100. Pollution peaks around 6:00 PM (O3: 50.4/100).
When is air pollution at its worst in Terni?
People in Terni tend to notice reduced air quality when oak and olive pollen peaks, or because of the ThyssenKrupp steel plant and nearby chemical and electrochemical manufacturing operations; the picture usually improves again once the season turns.
Are air quality levels in Terni 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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