Los Angeles, United States · Live air quality
We show Los Angeles's air the moment a fresh station reports.
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Los Angeles Air Quality Index (AQI) Today
Live air quality in Los Angeles, United States — real-time US AQI, PM2.5 & PM10 and a plain-English health advisory, from OpenAQ station data.
We publish a live "safe to go out" answer for Los Angeles as soon as a fresh station reading is available.
24-hour AQI graph
We record this city's AQI every hour — the 24-hour intraday graph fills in over the next day as readings accumulate.
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.
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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 Los Angeles
This page tracks the Los Angeles 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 Los Angeles 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 Los Angeles today?
We show Los Angeles's AQI whenever a fresh station reading is available.
Is it safe to go outside in Los Angeles today?
We publish a live "safe to go out" answer for Los Angeles as soon as a fresh station reading is available.
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 Los Angeles'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".