Worst air pollution Rio Grande, today and tomorrow

Today (9 August): Air quality in Rio Grande is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 7:00 PM (O3: 18.3/100).
Tomorrow (10 August 2026): Air quality in Rio Grande is good. All pollutants stay as today. Pollution peaks around 2:00 AM (O3: 18.4/100). 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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Rio Grande's air quality reflects its position at the mouth of the Patos Lagoon in far southern Brazil, with the Port of Rio Grande's bulk cargo and fertiliser terminal operations and the surrounding Polo Naval industrial complex generating elevated PM2.5 and SO₂ alongside vehicle traffic on the BR-392. Consistent southerly Pampas winds from Argentina generally provide good maritime ventilation, while the industrial port concentration makes Rio Grande one of Rio Grande do Sul's more industrially impacted coastal municipalities.

Today - 9 August | Pollution peaks at 19:00

AQI:

Good

18.3/100

PM2.5 (fine particles):

Good

8.2/100

PM10 (coarse particles):

Good

3.8/100

NO2 (nitrogen dioxide):

Good

0/100

O3 (ozone):

Good

18.3/100

SO2 (sulfur dioxide):

Good

0/100

CO (carbon monoxide):

Good

0/100

HCHO (formaldehyde):

Good

0.3/100

PM1 (ultrafine particles):

Good

0.9/100

Levels show the poorest local air quality during the day

Tomorrow - 10 August | Pollution peaks at 02:00

AQI:

Good

18.4/100

PM2.5 (fine particles):

Good

10.4/100

PM10 (coarse particles):

Good

4.7/100

NO2 (nitrogen dioxide):

Good

0/100

O3 (ozone):

Good

18.4/100

SO2 (sulfur dioxide):

Good

0/100

CO (carbon monoxide):

Good

0/100

HCHO (formaldehyde):

Good

0.3/100

PM1 (ultrafine particles):

Good

1.2/100

Pollen forecast in Rio Grande

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Frequently Asked Questions

Is air quality bad in Rio Grande right now?

On 9 August 2026, overall air quality in Rio Grande is good. AQI is the main air quality indicator at 18.3/100. Pollution peaks around 7:00 PM (O3: 18.3/100).

Will air quality be worse tomorrow in Rio Grande?

On 10 August 2026, air quality conditions in Rio Grande will be similar to today, with AQI forecast at good at 18.4/100. Pollution peaks around 2:00 AM (O3: 18.4/100).

When is air pollution at its worst in Rio Grande?

The most noticeable dips in Rio Grande's air quality come when native pampa grasses and coastal dune vegetation pollen peaks, or because of the Port of Rio Grande's bulk cargo and fertiliser terminal operations and the surrounding Polo Naval; conditions generally improve once the season shifts and rainfall or stronger winds return.

Are air quality levels in Rio Grande 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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