Worst air pollution Salto, today and tomorrow
Today (20 September): Air quality in Salto is moderate. AQI and PM2.5 are moderate; PM10 is fair; NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 AM (PM2.5: 40.4/100).
Tomorrow (21 September 2026): Air quality in Salto is fair. AQI improves to fair; PM2.5 decreases to fair; all other pollutants stay as today. Pollution peaks around 3:00 AM (PM2.5: 32.8/100). 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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Salto's air quality benefits from its position on the Uruguay River border between Uruguay and Argentina, with consistent Pampas winds from the southwest providing generally good natural ventilation across this northwestern Uruguayan thermal resort city. Vehicle traffic on the Ruta 3 and the Salto Grande hydroelectric complex's infrastructure activity are the primary local sources, while the flat Pampas terrain and the Uruguay River corridor generally maintain moderate to good conditions, making Salto among Uruguay's cleaner medium-sized urban environments.
Today - 20 September | Pollution peaks at 09:00
AQI:
Moderate
40.4/100
PM2.5 (fine particles):
Moderate
40.4/100
PM10 (coarse particles):
Fair
36.0/100
NO2 (nitrogen dioxide):
Good
0.2/100
O3 (ozone):
Good
15.5/100
SO2 (sulfur dioxide):
Good
0.2/100
CO (carbon monoxide):
Good
0.3/100
HCHO (formaldehyde):
Good
0.5/100
PM1 (ultrafine particles):
Good
14.7/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 03:00
AQI:
Fair
32.8/100
PM2.5 (fine particles):
Fair
32.8/100
PM10 (coarse particles):
Fair
28.3/100
NO2 (nitrogen dioxide):
Good
0.2/100
O3 (ozone):
Good
15.7/100
SO2 (sulfur dioxide):
Good
0.2/100
CO (carbon monoxide):
Good
0.3/100
HCHO (formaldehyde):
Good
0.5/100
PM1 (ultrafine particles):
Good
12.2/100
Pollen forecast in Salto
View pollen forecastFrequently Asked Questions
Is air quality bad in Salto right now?
On 20 September 2026, overall air quality in Salto is moderate. AQI is the main air quality indicator at 40.4/100. Pollution peaks around 9:00 AM (PM2.5: 40.4/100).
Will air quality be worse tomorrow in Salto?
On 21 September 2026, air quality conditions in Salto will be better than today, with AQI forecast at fair at 32.8/100. Pollution peaks around 3:00 AM (PM2.5: 32.8/100).
When is air pollution at its worst in Salto?
People in Salto tend to notice reduced air quality when native Amazon forest remnants and secondary vegetation pollen peaks, or because of vehicle traffic on the Ruta 3 and the Salto Grande hydroelectric complex's infrastructure activity; outside those spells, this remains one of the more consistently clean-air places to be.
Are air quality levels in Salto 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 14:33 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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