Santiago, Chile · Live air quality
You're looking at Santiago's air right now — US AQI 79, moderate, driven by PM2.5.
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Santiago Air Quality Index (AQI) Today
Live air quality in Santiago, Chile — real-time US AQI, PM2.5 & PM10 and a plain-English health advisory, from OpenAQ station data.
Yes — Santiago's US AQI is 79 (Moderate). Fine for most; unusually sensitive people may limit prolonged outdoor exertion.
Where 79 sits on the US EPA scale
What you can do outside right now
General guidance by AQI band. Sensitive groups should act one level earlier.
Live pollutant levels
Computed on the US EPA AQI scale from PM2.5 and PM10 concentrations; the city AQI is the higher sub-index (the dominant pollutant). Bars show the sub-index out of 500.
What this air does to your body
Illustrative equivalences from published research (Berkeley Earth; Air Quality Life Index, University of Chicago). Not a medical assessment of your personal risk.
24-hour AQI graph
min 79 · max 79Hourly AQI recorded each hour by DailyAQI (local time). Fills to a rolling 24 hours.
7-day AQI trend
We're recording daily readings for this city — the 7-day trend chart fills in over the coming days as history accumulates.
Air quality calendar
A colour-coded calendar of daily air quality builds here as we record each day — check back as the month fills in.
Make it personal
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Alert me when the air turns unhealthy
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What Moderate air means for you
Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.
Health guidance per US EPA AQI categories. Informational only — not medical advice.
US AQI categories
| AQI | Category | Health impact |
|---|---|---|
| 0–50 | Good | Air quality is satisfactory, and air pollution poses little or no risk. |
| 51–100 | Moderate | Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion. |
| 101–150 | Unhealthy for Sensitive Groups | Members of sensitive groups may experience health effects; the general public is less likely to be affected. |
| 151–200 | Unhealthy | Some members of the general public may experience health effects; sensitive groups may experience more serious effects. |
| 201–300 | Very Unhealthy | Health alert: the risk of health effects is increased for everyone. |
| 301–500 | Hazardous | Health warning of emergency conditions; everyone is more likely to be affected. Stay indoors. |
Monitoring location
Approximate location of the monitoring station(s) feeding this reading. Map © OpenStreetMap.
About air quality in Santiago
This page tracks the Santiago Air Quality Index using measurements from public monitoring stations aggregated by OpenAQ, reported on the US EPA AQI scale — the international standard used by most worldwide air-quality services. The index runs from 0 to 500; the higher the number, the more polluted the air and the greater the health concern. It is calculated here from fine particulate matter (PM2.5) and coarse particulate matter (PM10), the pollutants that most often drive urban air quality.
Air quality in Santiago varies through the day and across seasons with traffic, industry, weather and — in many regions — seasonal biomass or crop burning. Checking the live reading before outdoor exercise or a commute helps you decide whether to adjust timing, wear a mask, or keep windows closed. We only display a number when a recent station reading exists; if you see "data updating", we are waiting on fresh data rather than showing an estimate.
Frequently asked questions
What is the AQI in Santiago today?
The current US EPA Air Quality Index in Santiago is 79 (Moderate), driven by PM2.5.
Is it safe to go outside in Santiago today?
Yes — Santiago's US AQI is 79 (Moderate). Fine for most; unusually sensitive people may limit prolonged outdoor exertion.
Which AQI scale is used here?
International cities use the US EPA AQI scale (0–500), the global standard also used by most worldwide air-quality services, computed from PM2.5 and PM10. Indian cities on this site use India's national CPCB scale.
How is Santiago's AQI measured?
From public monitoring stations aggregated by OpenAQ. We only show a reading when a station has reported within the last few hours; otherwise the page says "data updating".