Air Quality Index (AQI) in Puerto Rico 🇵🇷
Live Air Quality Index (AQI) and PM2.5 Levels in Puerto Rico
Currently, the Air Quality Index (AQI) in San Juan, the capital of Puerto Rico, is measured at a score of 15. According to the US EPA health standard, this air quality rating is categorized as Good. The current atmosphere in San Juan is influenced by a PM2.5 (fine particulate matter) concentration of 2.7 µg/m³ and PM10 levels recorded at 4.4 µg/m³. Monitoring of gaseous pollutants shows Nitrogen Dioxide (NO2) at 0.5 µg/m³.
Beyond the primary urban hubs, atmospheric conditions and smog levels fluctuate across Puerto Rico based on industrial output, traffic density, and local weather patterns. Real-time pollution data and respiratory health alerts are also being actively monitored in cities like Bayamón, Caroline, Ponce, Arecibo and Caguas. Tracking these air quality metrics is essential for residents nationwide to manage outdoor exposure and maintain respiratory safety during periods of increased particulate concentration.
Puerto Rico Air Quality: Major Cities Index
- 1
- 1
- 1
- 1
- 1
- 1
- 1
- 1
- 1
- 1
- 1
- 1
- 1
- 1
- 1
- 1
- 1
- 1
* Air Quality Index (AQI) data for Puerto Rico is calculated using the US EPA standard. Information is processed from multiple monitoring stations detecting PM2.5, PM10, and gaseous pollutants to ensure accuracy for respiratory health planning.
Frequently Asked Questions about Air Quality in Puerto Rico
What is the air quality in Puerto Rico right now?
The current AQI in San Juan (capital of Puerto Rico) is 15 — categorised as Good. Conditions vary across the country — see AQI for all cities for a complete picture.
Which city in Puerto Rico has the worst air quality right now?
Right now, San Juan has the highest AQI reading in Puerto Rico at 15 (Good).
Which city in Puerto Rico has the best air quality right now?
Vega Baja currently has the lowest AQI in Puerto Rico at 6 (Good).
What is the PM2.5 level in San Juan today?
The PM2.5 (fine particulate) concentration in San Juan, the capital of Puerto Rico, is currently 2.7 µg/m³. The WHO 24-hour guideline is 15 µg/m³.
Is the air in Puerto Rico safe to breathe today?
Most cities in Puerto Rico currently report acceptable air-quality levels, though local conditions vary.
What are the cleanest cities in Puerto Rico right now?
Top 5 cities in Puerto Rico with the best (lowest) AQI right now:
- Vega Baja: AQI 6 — Good
- Barceloneta: AQI 6 — Good
- Bayamón: AQI 7 — Good
- Caroline: AQI 7 — Good
- Caguas: AQI 7 — Good
What are the most polluted cities in Puerto Rico right now?
Top 5 cities in Puerto Rico with the worst (highest) AQI right now:
- San Juan: AQI 15 — Good
- Mayagüez: AQI 13 — Good
- Guayama: AQI 13 — Good
- Humacao: AQI 13 — Good
- Cayey: AQI 13 — Good
Air Quality Scales & Resources
Wondering what these AQI numbers mean for your health? Our worldwide air quality guide explains every level of the AQI, PM2.5, PM10, ozone, NO2, CO and SO2 scales, with practical health advice for each range.
→ Understanding Air Quality Levels: read the full guide