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The Air Quality Today page provides near real time air quality data for
California. This page provides links to other products including week-at-a-glance statistics and hourly air quality
data. Caution: Summaries are based on preliminary data. Preliminary data are
subject to change or deletion. |
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Summaries
of the latest ozone data for selected California regions. The summaries
include the maximum ozone concentrations (ppm) for today, yesterday,
and the year so far. Caution: Summaries are based on preliminary data. Preliminary data are
subject to change or deletion. |
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See
summaries indicating how good or bad the air quality is throughout
California for a number of pollutants. For example, you can view the
number of days per year that air quality is deemed to be unhealthy, and
how this has changed over the years. Toxics data summaries are also
available. |
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The
California Almanac of Emissions and Air Quality - 2009 Edition is now
available Adobe Acrobat format. In addition, all tables from this
document are available in both Excel and text formats so users can use
these data to create alternate presentations. The CD version of the
2009 California Almanac can be ordered through the Order Form for Air
Quality Products or by email to aqdweb@arb.ca.gov. |
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Easy
to understand information for commonly asked questions about ambient
air quality in California. Learn how air quality varies statewide.
Learn how to tell how polluted the air is where you live and work. |
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Here
you will find a listing of the air quality monitoring sites in
California and what pollutants are monitored at each site. Tables
indicate how many years of data are available for each site. Includes
maps of the site locations. |
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The
ARB designates areas of California for each criteria pollutant based on
recent ambient air quality data. The Area Designations provides
information regarding the designation areas in California with respect
to the State Ambient Air Quality Standards. Areas can be designated as
attainment, nonattainement, or unclassified. |
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Access information on the status of the air quality monitoring network for fine particulate matter (PM2.5), i.e., where and how PM2.5
is monitored in California. This link also includes information on
planned changes to the monitoring network, as well as a summary table
of the monitoring results. |
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The
ARB has co-sponsored several special field measurement studies for the
purpose of collecting air quality, meteorological, and emission data
for data analysis and modeling. Descriptions and data are available for
the Central California Air Quality Studies (CCAQS) and the 1997
Southern California Ozone Study (SCOS97-NARSTO). |
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Copies
of our Air Quality Data Products can be quickly ordered. For example,
you can order a paper copy of the monitoring network plan or the
almanac. You can also order Air Quality Data CD/DVDs this way. |
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The
Air Quality Data CD/DVDs are available free upon request. These CD/DVDs
contain a snapshot of 26 years of California air quality data. These
CD/DVDs store the data in many formats (ASCII, DBF, etc.). These
CD/DVDs also include annual and daily summaries in table format. |
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The
E-Mail Sign Up is for the Air Quality Data List Serve which provides an
opportunity to sign up to receive e-mail notification of updates to air
quality related data, documents, and products developed by the ARB. |
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Please send questions or comments to: aqdweb@arb.ca.gov
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