Air Quality Index (AQI) in Chile 🇨🇱

Live Air Quality Index (AQI) and PM2.5 Levels in Chile

Currently, the Air Quality Index (AQI) in Santiago, the capital of Chile, is measured at a score of 155. According to the US EPA health standard, this air quality rating is categorized as Sensitive. The current atmosphere in Santiago is influenced by a PM2.5 (fine particulate matter) concentration of 61.2 µg/m³ and PM10 levels recorded at 61.2 µg/m³. Monitoring of gaseous pollutants shows Nitrogen Dioxide (NO2) at 79.0 µg/m³.

Beyond the primary urban hubs, atmospheric conditions and smog levels fluctuate across Chile 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 Puente Alto, Antofagasta, Viña del Mar, Valparaíso and Talcahuano. Tracking these air quality metrics is essential for residents nationwide to manage outdoor exposure and maintain respiratory safety during periods of increased particulate concentration.

Air Quality Snapshot: Chile Right Now

Across 31 monitored cities in Chile, live air quality currently ranges from a low of 9 AQI in Puerto Montt (the cleanest air right now) to a high of 155 AQI in Santiago (the most polluted). By US EPA health band, the nationwide distribution stands at 9 Good, 19 Moderate, 3 Unhealthy. The average fine-particulate (PM2.5) concentration across these cities is 15.5 µg/m³ — approximately 3.1 times the World Health Organization (WHO) annual air quality guideline of 5 µg/m³.

Chile Air Quality: Major Cities Index

Pollution Monitor & AQI Forecast: Chile Regions

Ovalle
1

* Air Quality Index (AQI) data for Chile 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.

What Today's Readings Mean in Chile

The median reading across 31 monitored cities is 52 AQI. The national spread is 146 points, from 9 in Puerto Montt to 155 in Santiago. Average PM2.5 is 15.5 µg/m³ (3.1× the WHO annual guideline).

At least one monitored location is Unhealthy. Reduce prolonged outdoor exertion and check the city reading before planning exercise or travel.

See the complete AQI and pollutant reference scales

Health & Scientific Resources

→ How to read US EPA Air Quality Index before going outside → Understanding Air Quality Index levels and what they mean → When haze forms and what it does to air quality

Air Quality in Chile — FAQ

Common questions about AQI levels, pollutants, and data sources for Chile.

What is the current air quality in Chile?

Live AQI readings for 31 city(ies) across Chile are listed above on the US EPA 0-500 scale.

Where does Chile's AQI data come from?

Real-time readings come from ground-based monitoring stations operated by national environmental agencies in Chile, delivered via WeatherAPI.com and aggregated using the EPA AQI formula.

What is a healthy AQI value in Chile?

On the EPA scale used worldwide, 0-50 is Good, 51-100 is Moderate, 101-150 is Unhealthy for sensitive groups, 151-200 is Unhealthy, 201-300 is Very Unhealthy, and 301-500 is Hazardous. The WHO 24-hour PM2.5 guideline is 15 μg/m³.

Why do AQI readings vary between cities in Chile?

Air quality is highly local — major pollution sources (traffic, industry, dust, wildfires) cluster around cities, while wind direction and topography move them around. Comparing nearby readings on this page is the best way to see how conditions change across Chile.