Worst air pollution Caltanissetta, today and tomorrow
Today (20 September): Air quality in Caltanissetta is moderate. AQI and PM2.5 are moderate; PM10 and PM1 are fair; NO2, O3, SO2, CO, and HCHO are good. Pollution peaks around 5:00 AM (PM2.5: 40.1/100).
Tomorrow (21 September 2026): Air quality in Caltanissetta is fair. AQI improves to fair; PM2.5 decreases to fair; PM10 decreases to good; NO2 increases to fair; all other pollutants stay as today. Pollution peaks around 11:00 PM (PM2.5: 26.3/100). Airmine updates local air quality forecasts four times daily.
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Caltanissetta's air quality reflects the enclosed central Sicilian plateau at 588 metres, with vehicle traffic on the A19 motorway and surrounding sulphur mining legacy and agricultural operations contributing local sources. The surrounding Sicilian mountains create partial topographic enclosure, while the Mediterranean climate's summer anticyclonic conditions allow ozone to accumulate from vehicle emissions and Saharan dust intrusions periodically deliver elevated PM10 across the central Sicilian interior throughout the year.
Today - 20 September | Pollution peaks at 05:00
AQI:
Moderate
40.1/100
PM2.5 (fine particles):
Moderate
40.1/100
PM10 (coarse particles):
Fair
27.5/100
NO2 (nitrogen dioxide):
Good
19.3/100
O3 (ozone):
Good
16.4/100
SO2 (sulfur dioxide):
Good
0.7/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
3.5/100
PM1 (ultrafine particles):
Fair
30.1/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 23:00
AQI:
Fair
26.3/100
PM2.5 (fine particles):
Fair
26.3/100
PM10 (coarse particles):
Good
15.1/100
NO2 (nitrogen dioxide):
Fair
21.3/100
O3 (ozone):
Good
17.2/100
SO2 (sulfur dioxide):
Good
0.5/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
2.4/100
PM1 (ultrafine particles):
Fair
22.1/100
Pollen forecast in Caltanissetta
View pollen forecastFrequently Asked Questions
Is air quality bad in Caltanissetta right now?
On 20 September 2026, overall air quality in Caltanissetta is moderate. AQI is the main air quality indicator at 40.1/100. Pollution peaks around 5:00 AM (PM2.5: 40.1/100).
Will air quality be worse tomorrow in Caltanissetta?
On 21 September 2026, air quality conditions in Caltanissetta will be better than today, with AQI forecast at fair at 26.3/100. Pollution peaks around 11:00 PM (PM2.5: 26.3/100).
When is air pollution at its worst in Caltanissetta?
Reduced air quality in Caltanissetta is most likely when below olive and almond pollen peaks, alongside periods of vehicle traffic on the A19 motorway and neighbouring sulphur mining legacy and agricultural operations; wind and rain both help clear the air fairly quickly here.
Are air quality levels in Caltanissetta 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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