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Numbers in the chart below show the Air Quality Index for today, based on an average over time. The Index numbers represent a ranking for the pollutant, not the measurement of a pollutant. When air quality is expected to be worse — such as during wildfires, which produce elevated levels of particulate matter (PM) — it is important to check hourly readings, which do show the measurement of the pollutant. Hourly readings are available on the Station Data page. The Index below presents ratings for: ozone, a principal component of smog; particulate matter smaller than 10 microns in diameter (PM10); and particulate matter smaller than 2.5 microns in diameter (PM2.5). Note: all data are preliminary and subject to verification. To view exceedances of standards, see Days Exceeding Ozone and Particulate Standards. See also outlooks and smoke reports for California wildfires posted on California Smoke Information site.

We now have temporary air monitoring for fine particles (PM 2.5) in Santa Ynez, page down on the chart below. We also have temporary PM 2.5 air monitoring in Los Alamos and Carpinteria.  These report data to a national website. When you get to that site, you will see summary information on the right, and you can page down to see levels for Carpinteria and Los Alamos. Note that the national website is best viewed with Chrome or Firefox browsers, and Internet Explorer versions 10 or below. The forecast above has forecasted PM 2.5 levels for several areas of the county, including Carpinteria and Los Alamos.

Today’s AQI | AQI Summary by DateOzone Data SummaryStation DataExceedances | Monitoring | Wind