Worst air pollution San Pedro Sula, today and tomorrow
Today (9 August): Air quality in San Pedro Sula is fair. AQI, PM10, and O3 are fair; PM2.5, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 7:00 AM (O3: 25.2/100).
Tomorrow (10 August 2026): Air quality in San Pedro Sula is fair. All pollutants stay as today. Pollution peaks around 10:00 AM (PM10: 26.2/100). 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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San Pedro Sula's air quality reflects the Honduras Sula Valley's enclosed basin at 75 metres between the Merendón and Nombre de Dios mountain ranges, with vehicle density and the manufacturing, textile maquiladora, and industrial corridor generating elevated PM2.5. The valley's topographic enclosure creates concentration under inversions and San Pedro Sula generally maintains moderate to elevated Central American industrial valley metropolitan readings throughout most of the year.
Today - 9 August | Pollution peaks at 07:00
AQI:
Fair
25.2/100
PM2.5 (fine particles):
Good
18.2/100
PM10 (coarse particles):
Fair
22.2/100
NO2 (nitrogen dioxide):
Good
15.5/100
O3 (ozone):
Fair
25.2/100
SO2 (sulfur dioxide):
Good
3.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.5/100
PM1 (ultrafine particles):
Good
8.9/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 10:00
AQI:
Fair
26.2/100
PM2.5 (fine particles):
Good
17.6/100
PM10 (coarse particles):
Fair
26.2/100
NO2 (nitrogen dioxide):
Good
13.1/100
O3 (ozone):
Fair
22.6/100
SO2 (sulfur dioxide):
Good
2.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.7/100
PM1 (ultrafine particles):
Good
7.1/100
Frequently Asked Questions
Is air quality bad in San Pedro Sula right now?
On 9 August 2026, overall air quality in San Pedro Sula is fair. AQI is the main air quality indicator at 25.2/100. Pollution peaks around 7:00 AM (O3: 25.2/100).
Will air quality be worse tomorrow in San Pedro Sula?
On 10 August 2026, air quality conditions in San Pedro Sula will be similar to today, with AQI forecast at fair at 26.2/100. Pollution peaks around 10:00 AM (PM10: 26.2/100).
When is air pollution at its worst in San Pedro Sula?
Air quality in San Pedro Sula tends to be worse when vehicle traffic as well as textile and manufacturing operations build up and the surrounding valley traps air close to the ground. The bowl-like terrain here limits how quickly pollutants can escape. These wind events can carry dust in from the surrounding arid landscape.
Are air quality levels in San Pedro Sula 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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