Worst air pollution Pombal, today and tomorrow
Today (20 September): Air quality in Pombal is fair. AQI, PM2.5, NO2, and PM1 are fair; PM10, O3, SO2, CO, and HCHO are good. Pollution peaks around 10:00 AM (PM2.5: 28.2/100).
Tomorrow (21 September 2026): Air quality in Pombal is fair. O3 increases to fair; PM1 decreases to good; all other pollutants stay as today. Pollution peaks around 1:00 PM (NO2: 37.2/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Pombal's air quality reflects the Arunca river valley in central Portugal, with consistent Atlantic westerlies providing reliable ventilation across this Batalha-Leiria corridor city. Vehicle traffic on the A1 motorway and surrounding agricultural and light manufacturing industry contribute the primary local sources, while the Atlantic coastal proximity and the Pombal hills provide moderate topographic variation, generally maintaining Pombal among Portugal's more moderate central corridor urban environments throughout most of the year.
Today - 20 September | Pollution peaks at 10:00
AQI:
Fair
28.2/100
PM2.5 (fine particles):
Fair
28.2/100
PM10 (coarse particles):
Good
13.4/100
NO2 (nitrogen dioxide):
Fair
22.6/100
O3 (ozone):
Good
19.6/100
SO2 (sulfur dioxide):
Good
2.0/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
3.0/100
PM1 (ultrafine particles):
Fair
22.0/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 13:00
AQI:
Fair
37.2/100
PM2.5 (fine particles):
Fair
26.5/100
PM10 (coarse particles):
Good
12.3/100
NO2 (nitrogen dioxide):
Fair
37.2/100
O3 (ozone):
Fair
21.8/100
SO2 (sulfur dioxide):
Good
2.3/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
4.0/100
PM1 (ultrafine particles):
Good
16.7/100
Pollen forecast in Pombal
View pollen forecastFrequently Asked Questions
Is air quality bad in Pombal right now?
On 20 September 2026, overall air quality in Pombal is fair. AQI is the main air quality indicator at 28.2/100. Pollution peaks around 10:00 AM (PM2.5: 28.2/100).
Will air quality be worse tomorrow in Pombal?
On 21 September 2026, air quality conditions in Pombal will be similar to today, with AQI forecast at fair at 37.2/100. Pollution peaks around 1:00 PM (NO2: 37.2/100).
When is air pollution at its worst in Pombal?
Pombal residents notice reduced air quality mainly when oak and eucalyptus pollen peaks, and during spells of vehicle traffic on the A1 motorway and nearby agricultural and light manufacturing industry; a change of season or a spell of wind usually clears things up again.
Are air quality levels in Pombal 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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