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Air Quality: EPA's Integrated Science Assessments (ISAs)

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Carbon Monoxide Lead Nitrogen Dioxide Ozone Sulfur Dioxide Particulate Matter Nitrogen Dioxide & Sulfur Dioxide - Ecological Criteria AIRNow Air Quality Air Quality Twitter HERO

EPA has set National Ambient Air Quality Standards (NAAQS) for six principal pollutants, which include: ozone, particulate matter, carbon monoxide, sulfur oxides, nitrogen oxides, and lead. Called criteria pollutants, these are derived from numerous sources and are considered harmful to public health and the environment. [Learn more]

Featured Publications
Click to download the final report of the Integrated Science Assessment for Lead (2013) (PDF)(1885 pp, 24 MB)
(PDF, 1885 pp, 24 MB,
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Click to download the final report of the Integrated Science Assessment for Ozone (2013) (PDF)(2228 pp, 1,105 MB)
(PDF, 1251 pp, 40 MB,
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Click to download the featured reports. Both of these are large reports and may take some time to open/download.

Basic Information Carbon Monoxide Lead Ozone Nitrogen Oxides & Sulfur Particulate Matter Frequent Questions Publications Related Links

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