Worst air pollution Gragnano, today and tomorrow
Today (20 September): Air quality in Gragnano is moderate. AQI, PM2.5, and PM1 are moderate; PM10, NO2, and O3 are fair; SO2, CO, and HCHO are good. Pollution peaks around 2:00 AM (PM1: 47.8/100).
Tomorrow (21 September 2026): Air quality in Gragnano is moderate. NO2 increases to moderate; O3 increases to moderate; HCHO increases to fair; all other pollutants stay as today. Pollution peaks around 9:00 AM (PM1: 54.5/100). Airmine updates local air quality forecasts four times daily.
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Gragnano's air quality reflects its position in a valley of the Lattari mountains near Naples, with vehicle traffic funnelled through the narrow valley contributing the main local sources through the year. Weather patterns typical of Campania shape how quickly pollutants clear, with conditions generally improving whenever winds pick up or rain moves through, while calmer, high-pressure spells tend to let local emissions accumulate for longer than elsewhere in the region.
Today - 20 September | Pollution peaks at 02:00
AQI:
Moderate
47.8/100
PM2.5 (fine particles):
Moderate
41.5/100
PM10 (coarse particles):
Fair
27.4/100
NO2 (nitrogen dioxide):
Fair
30.9/100
O3 (ozone):
Fair
36.3/100
SO2 (sulfur dioxide):
Good
1.4/100
CO (carbon monoxide):
Good
1.0/100
HCHO (formaldehyde):
Good
19.8/100
PM1 (ultrafine particles):
Moderate
47.8/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 09:00
AQI:
Moderate
54.5/100
PM2.5 (fine particles):
Moderate
43.0/100
PM10 (coarse particles):
Fair
28.6/100
NO2 (nitrogen dioxide):
Moderate
46.9/100
O3 (ozone):
Moderate
40.4/100
SO2 (sulfur dioxide):
Good
1.8/100
CO (carbon monoxide):
Good
1.3/100
HCHO (formaldehyde):
Fair
22.1/100
PM1 (ultrafine particles):
Moderate
54.5/100
Pollen forecast in Gragnano
View pollen forecastFrequently Asked Questions
Is air quality bad in Gragnano right now?
On 20 September 2026, overall air quality in Gragnano is moderate. AQI is the main air quality indicator at 47.8/100. Pollution peaks around 2:00 AM (PM1: 47.8/100).
Will air quality be worse tomorrow in Gragnano?
On 21 September 2026, air quality conditions in Gragnano will be similar to today, with AQI forecast at moderate at 54.5/100. Pollution peaks around 9:00 AM (PM1: 54.5/100).
When is air pollution at its worst in Gragnano?
Gragnano sees its worst air quality stretches line up with plane and pine pollen peaks and periods of vehicle traffic funnelled through the narrow valley; outside of those windows, the Campania area generally settles into calmer, more breathable conditions.
Are air quality levels in Gragnano 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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