City in Baja California, Mexico
Air quality in Tijuana
Polluted
The annual average PM2.5 in Tijuana was 20 µg/m³ in 2018, about 4.0 times the WHO guideline of 5 µg/m³. Traffic and border-queue exhaust affect air quality near crossings; coastal breezes usually clear it.
Key facts
- PM2.5: 20 µg/m³ yearly average (2018). Measured at Tijuana.
Air quality across Mexico
| Place | PM2.5 | Level |
|---|---|---|
| Guanajuato | 11 µg/m³ | Moderate |
| San Miguel de Allende | 12 µg/m³ | Moderate |
| Querétaro | 13 µg/m³ | Moderate |
| Mérida | 14.6 µg/m³ | Moderate |
| Cuernavaca | 15.3 µg/m³ | Polluted |
| Morelia | 16.4 µg/m³ | Polluted |
| Puebla | 19 µg/m³ | Polluted |
| Tijuana | 20 µg/m³ | Polluted |
| Mexico City | 22 µg/m³ | Polluted |
| Oaxaca | 22 µg/m³ | Polluted |
| Monterrey | 23 µg/m³ | Polluted |
| Guadalajara | 25 µg/m³ | Polluted |
Quick answers
Is the air in Tijuana bad?
Polluted: 20 µg/m³ of PM2.5 on average, 4.0× the WHO guideline.
When is the air worst in Tijuana?
Traffic and border-queue exhaust affect air quality near crossings; coastal breezes usually clear it.
How does Tijuana compare with the rest of Mexico?
People in Mexico breathe 17 µg/m³ of PM2.5 on average (2023, World Bank/WHO), against 20 µg/m³ measured here.
More about Tijuana
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Sources
- WHO Ambient Air Quality Database
- WHO air quality guidelines (2021)
- Live air quality map (WAQI)
- Tijuana International Airport (Grupo Aeroportuario del Pacífico)
- Cross Border Xpress
- US CBP border wait times
Annual averages are measured values reported to the WHO; check a live map for today's air. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.