Worst air pollution Rio do Sul, today and tomorrow
Today (9 August): Air quality in Rio do Sul is fair. AQI and PM2.5 are fair; PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 PM (PM2.5: 28.3/100).
Tomorrow (10 August 2026): Air quality in Rio do Sul is fair. All pollutants stay as today. Pollution peaks around 1:00 PM (PM2.5: 31.0/100). 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 do Sul's air quality reflects the Itajaí do Sul river valley in the Santa Catarina highlands at 374 metres, with vehicle emissions from the BR-470 and surrounding textile, metalworking, and food processing industry contributing local sources. The valley's topographic enclosure between the Serra Geral highlands creates modest concentration under calm conditions, while Atlantic sea breezes from the nearby Itajaí coast provide periodic ventilation relief throughout the year.
Today - 9 August | Pollution peaks at 15:00
AQI:
Fair
28.3/100
PM2.5 (fine particles):
Fair
28.3/100
PM10 (coarse particles):
Good
13.5/100
NO2 (nitrogen dioxide):
Good
0.5/100
O3 (ozone):
Good
18.5/100
SO2 (sulfur dioxide):
Good
1.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.4/100
PM1 (ultrafine particles):
Good
3.1/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 13:00
AQI:
Fair
31.0/100
PM2.5 (fine particles):
Fair
31.0/100
PM10 (coarse particles):
Good
14.8/100
NO2 (nitrogen dioxide):
Good
0.4/100
O3 (ozone):
Good
18.7/100
SO2 (sulfur dioxide):
Good
1.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.3/100
PM1 (ultrafine particles):
Good
3.6/100
Pollen forecast in Rio do Sul
View pollen forecastFrequently Asked Questions
Is air quality bad in Rio do Sul right now?
On 9 August 2026, overall air quality in Rio do Sul is fair. AQI is the main air quality indicator at 28.3/100. Pollution peaks around 3:00 PM (PM2.5: 28.3/100).
Will air quality be worse tomorrow in Rio do Sul?
On 10 August 2026, air quality conditions in Rio do Sul will be similar to today, with AQI forecast at fair at 31.0/100. Pollution peaks around 1:00 PM (PM2.5: 31.0/100).
When is air pollution at its worst in Rio do Sul?
Rio do Sul residents notice reduced air quality mainly when native Atlantic Forest species and eucalyptus pollen peaks, and during spells of vehicle emissions from the BR-470 and surrounding textile, metalworking, and food processing industry; background levels usually settle back down once the season changes.
Are air quality levels in Rio do Sul 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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