Worst air pollution Tijuana, today and tomorrow
Today (23 August): Air quality in Tijuana is moderate. AQI and PM10 are moderate; PM2.5 and O3 are fair; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 5:00 AM (PM10: 40.0/100).
Tomorrow (24 August 2026): Air quality in Tijuana is fair. AQI improves to fair; PM10 decreases to fair; all other pollutants stay as today. Pollution peaks around 5:00 AM (PM10: 39.0/100). 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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Tijuana's air quality reflects the US-Mexico border position adjacent to San Diego, with vehicle traffic on the surrounding expressways and the maquiladora manufacturing, international border crossing, and construction corridor generating elevated PM2.5 and NOₓ. The Pacific coastal proximity provides limited sea breeze ventilation, while the extraordinary San Ysidro border crossing vehicle concentration and the flat Tijuana River valley's limited topographic dispersal maintain Tijuana among northwestern Mexico's more persistently vehicle and border crossing-influenced urban environments throughout the year.
Today - 23 August | Pollution peaks at 05:00
AQI:
Moderate
40.0/100
PM2.5 (fine particles):
Fair
22.7/100
PM10 (coarse particles):
Moderate
40.0/100
NO2 (nitrogen dioxide):
Good
0.1/100
O3 (ozone):
Fair
20.6/100
SO2 (sulfur dioxide):
Good
0.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.8/100
PM1 (ultrafine particles):
Good
4.0/100
Levels show the poorest local air quality during the day
Tomorrow - 24 August | Pollution peaks at 05:00
AQI:
Fair
39.0/100
PM2.5 (fine particles):
Fair
24.5/100
PM10 (coarse particles):
Fair
39.0/100
NO2 (nitrogen dioxide):
Good
0.1/100
O3 (ozone):
Fair
27.6/100
SO2 (sulfur dioxide):
Good
0.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
5.7/100
Pollen forecast in Tijuana
View pollen forecastFrequently Asked Questions
Is air quality bad in Tijuana right now?
On 23 August 2026, overall air quality in Tijuana is moderate. AQI is the main air quality indicator at 40.0/100. Pollution peaks around 5:00 AM (PM10: 40.0/100).
Will air quality be worse tomorrow in Tijuana?
On 24 August 2026, air quality conditions in Tijuana will be better than today, with AQI forecast at fair at 39.0/100. Pollution peaks around 5:00 AM (PM10: 39.0/100).
When is air pollution at its worst in Tijuana?
Air quality in Tijuana tends to be worse when vehicle traffic, light manufacturing, and ongoing construction work build up and maritime winds die down. Maritime airflow normally ventilates the area well, though calmer spells let levels rise. Areas further inland without this ventilation tend to fare worse.
Are air quality levels in Tijuana 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: 24 August 2026 at 02:28 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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