Current Air Quality Data and Forecasts

Hourly data is available in two formats: (1) as AQI values for comparison against the health-based air quality levels, and (2) as monitoring data in ppm or μg/m3. The raw monitoring data can be downloaded also for specific date ranges.  A description of the AQI levels and AQMD recommended cautionary statements can be found at Air Quality Index (PDF, 348kb).

Current Advisories



Current Hourly Air Quality



Today's Forecast



Tomorrow's Forecast



Tomorrow's Forecast
Text-based - includes Agricultural & Wildland Fires burn forecast



EPA AirNOW Air Quality Animation

Map Link to external website.


CARB Current Ozone Summary

Table Link to external website.


Check Before You Burn (residential fireplaces)
(in effect Nov. 1 - end of Feb.)



NOTE: Data for the current hourly air quality map are taken directly from SCAQMD's monitoring system and have not been validated and, therefore, are subject to change. Data for today's forecast map and tomorrow’s forecast map map are a result of air quality modeling calculations prepared by our meteorologists.


Other Data Presentations

The California Air Resources Board Link to external website. has current and historic data for the South Coast, as well as the whole state, including the Latest Ozone Summary. Link to external website.


In addition to our long-term ambient air quality monitoring program, SCAQMD conducts specialized measurement and analysis studies to address specific air quality issues.

Air Quality Monitoring Studies
Monitoring studies of air quality in the vicinity of specific industrial sites or communities, both criteria and toxic air pollutants  

Health Studies
Studies of the effects of ambient air pollutants on health.

Special Monitoring and Emissions Studies
Results of monitoring on specific issues such as wood smoke from beach fires, or site-specific investigations.

Meteorological Data

SCAQMD staff has developed AERMOD-ready meteorological data files for use in dispersion modeling.  Modeling guidance for AERMOD permitting applications is available as well. 

Please click here to access meteorological data for AERMOD modeling.

Related Information:

Wildfire Smoke & Ash Health Information & Safety Tips

Sign-up for Air Alerts
(Customizable email alerts)

More Information

Contact: Meteorology Staff

Newsletter Sign Up
Periodic newsletter updates via Email on a variety of air quality-related topics

South Coast Air Quality Management District

21865 Copley Dr, Diamond Bar, CA 91765



© 2018 South Coast Air Quality Management District