Worst air pollution Mérida, today and tomorrow
Today (9 August): Air quality in Mérida is poor. AQI and PM10 are poor; PM2.5 is medium; NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 PM (PM10: 60.6/100).
Tomorrow (10 August 2026): Air quality in Mérida is poor. All pollutants stay as today. Pollution peaks around 12:00 AM (PM10: 63.2/100). 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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Mérida's air quality benefits from the flat Yucatan Peninsula's sea breeze-ventilated coastal plain position, with vehicle traffic on surrounding roads and the henequen, tourism, and manufacturing corridor contributing local sources. Consistent Caribbean and Gulf of Mexico trade winds and sea breezes provide reliable maritime ventilation, while the flat karst plain allows reasonable dispersal and Mérida generally maintains among Mexico's more moderately ventilated major cities given its outstanding coastal trade wind exposure throughout most of the year.
Today - 9 August | Pollution peaks at 23:00
AQI:
Poor
60.6/100
PM2.5 (fine particles):
Medium
48.8/100
PM10 (coarse particles):
Poor
60.6/100
NO2 (nitrogen dioxide):
Good
0.1/100
O3 (ozone):
Good
20.0/100
SO2 (sulfur dioxide):
Good
1.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.3/100
PM1 (ultrafine particles):
Good
9.0/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 00:00
AQI:
Poor
63.2/100
PM2.5 (fine particles):
Medium
50.8/100
PM10 (coarse particles):
Poor
63.2/100
NO2 (nitrogen dioxide):
Good
0.1/100
O3 (ozone):
Good
18.2/100
SO2 (sulfur dioxide):
Good
0.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.4/100
PM1 (ultrafine particles):
Good
10.0/100
Frequently Asked Questions
Is air quality bad in Mérida right now?
On 9 August 2026, overall air quality in Mérida is poor. AQI is the main air quality indicator at 60.6/100. Pollution peaks around 11:00 PM (PM10: 60.6/100).
Will air quality be worse tomorrow in Mérida?
On 10 August 2026, air quality conditions in Mérida will be similar to today, with AQI forecast at poor at 63.2/100. Pollution peaks around 12:00 AM (PM10: 63.2/100).
When is air pollution at its worst in Mérida?
Pollution in Mérida typically rises when road traffic, manufacturing and food processing, together with seasonal tourism traffic combine, especially once maritime winds die down. Onshore breezes usually help clear the air, but pollution can build up when winds are light. This coastal advantage is less pronounced during still, high-pressure weather.
Are air quality levels in Mérida 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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