Capital city, Puerto Rico
Air quality in San Juan
Moderate
The annual average PM2.5 in San Juan was 12.6 µg/m³ in 2018, about 2.5 times the WHO guideline of 5 µg/m³. Saharan dust can haze the air in summer; otherwise air is generally clean.
Key facts
- PM2.5: 12.6 µg/m³ yearly average (2018). Measured at San Juan.
Quick answers
Is the air in San Juan bad?
Moderate: 12.6 µg/m³ of PM2.5 on average, 2.5× the WHO guideline.
When is the air worst in San Juan?
Saharan dust can haze the air in summer; otherwise air is generally clean.
How does San Juan compare with the rest of Puerto Rico?
People in Puerto Rico breathe 8 µg/m³ of PM2.5 on average (2023, World Bank/WHO), against 12.6 µg/m³ measured here.
More about San Juan
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Sources
- WHO Ambient Air Quality Database
- WHO air quality guidelines (2021)
- Live air quality map (WAQI)
- Discover Puerto Rico
- Luis Muñoz Marín International Airport
- Tren Urbano (ATI)
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 Spotted something out of date?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.