Most Polluted Cities — Puerto Rico

Real-time air quality data from cities around the world Puerto Rico

Real-time air pollution rankings for 10 cities across Puerto Rico, updated hourly. See which cities have the highest pollution levels and worst air quality.

Most Polluted Cities in Puerto Rico

The most polluted city in Puerto Rico is Aeropuerto Borinquen (AQI 29), followed by Humacao Airport (AQI 25), San Juan (AQI 25). Currently, 0 out of 10 monitored cities in Puerto Rico report unhealthy air quality with an AQI above 100.

Understanding Air Quality Index

0-50

Good

Air quality is satisfactory, and air pollution poses little or no risk.

51-100

Moderate

Air quality is acceptable. However, there may be a risk for some people.

101-150

Unhealthy for Sensitive Groups

Members of sensitive groups may experience health effects.

151-200

Unhealthy

Everyone may begin to experience health effects.

201-300

Very Unhealthy

Health alert: everyone may experience more serious health effects.

301+

Hazardous

Health warnings of emergency conditions. The entire population is likely to be affected.

The Air Quality Index (AQI) is a scale from 0 to 500 that measures air pollution levels. Poor air quality can cause respiratory issues, cardiovascular problems, and other health concerns. Rankings are updated hourly to help you stay informed.

Source: US EPA Air Quality Index

Last updated: 23 Mar 23:09

Airpult

Get accurate weather forecasts worldwide with real-time updates and severe weather alerts. Covering 6M+ locations with precise, reliable weather data.

© 2026 Samuenti GmbH. All rights reserved.

gb English
Metric (°C, km/h)