Worst air pollution Montijo, today and tomorrow

Today (21 July): Air quality in Montijo is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 PM (O3: 40.0/100).
Tomorrow (22 July 2026): Air quality in Montijo is fair. All pollutants stay as today. Pollution peaks around 5:00 PM (O3: 33.7/100). 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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Montijo's air quality reflects the southern Tagus estuary bank in the Setúbal peninsula opposite Lisbon, with vehicle traffic on the A2 motorway and the Montijo Airport's aviation operations contributing elevated NOₓ alongside the surrounding mixed industrial and residential character. The Tagus estuary provides Atlantic ventilation, while the prevailing northwesterly winds generally carry Lisbon's urban emissions southward toward the Montijo-Alcochete shoreline and the airport's operations add aviation emissions to the local corridor throughout the year.

Today - 21 July | Pollution peaks at 15:00

AQI:

Fair

40.0/100

PM2.5 (fine particles):

Good

11.0/100

PM10 (coarse particles):

Good

9.1/100

NO2 (nitrogen dioxide):

Good

12.4/100

O3 (ozone):

Fair

40.0/100

SO2 (sulfur dioxide):

Good

2.1/100

CO (carbon monoxide):

Good

0.0/100

HCHO (formaldehyde):

Good

6.6/100

PM1 (ultrafine particles):

Good

7.8/100

Levels show the poorest local air quality during the day

Tomorrow - 22 July | Pollution peaks at 17:00

AQI:

Fair

33.7/100

PM2.5 (fine particles):

Good

11.8/100

PM10 (coarse particles):

Good

8.9/100

NO2 (nitrogen dioxide):

Good

6.8/100

O3 (ozone):

Fair

33.7/100

SO2 (sulfur dioxide):

Good

2.2/100

CO (carbon monoxide):

Good

0.0/100

HCHO (formaldehyde):

Good

3.0/100

PM1 (ultrafine particles):

Good

7.3/100

Pollen forecast in Montijo

View pollen forecast

Frequently Asked Questions

Is air quality bad in Montijo right now?

On 21 July 2026, overall air quality in Montijo is fair. AQI is the main air quality indicator at 40.0/100. Pollution peaks around 3:00 PM (O3: 40.0/100).

Will air quality be worse tomorrow in Montijo?

On 22 July 2026, air quality conditions in Montijo will be similar to today, with AQI forecast at fair at 33.7/100. Pollution peaks around 5:00 PM (O3: 33.7/100).

When is air pollution at its worst in Montijo?

Reduced air quality in Montijo is most likely when local tree and grass pollen peaks, alongside periods of vehicle traffic on the A2 motorway and the Montijo Airport's aviation operations; the rest of the calendar year is generally more forgiving for air quality.

Are air quality levels in Montijo 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: 21 July 2026 at 16:20 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.

For long term forecasts and maps, see the Airmine app